EP0565283A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus and method for tone and color reproduction control
Assignee: Scitex Corp Ltd
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Filing: 1993-03-26
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Granted: —
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Expires: 2013-03-26
Abstract
Abstract A method for employing an existing color space as a color independent color space including the steps of calibrating a color transformation unit to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within an existing color space, and calibrating the color transformation unit to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the existing color space, wherein the first and second device-independent digital representations of the color image are substantially identical within the limitations of the first and second color processing devices.
Inventors
- 👤 Isak Duenyas
- 👤 Eliezer Baron
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 12:09
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
119 words
A method for employing an existing color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within an existing color space; and calibrating the color transformation unit to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the existing color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical within the limitations of the first and second color processing devices.
Claim 2
Independent Claim
119 words
A method for employing an existing color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within an existing color space; and calibrating the color transformation unit to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the existing color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical within the limitations of the first and second color processing devices.
Claim 3
Independent Claim
148 words
A method for employing an existing color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a device-independent digital representation of a color image within an existing color space into a first output device-dependent digital representation suitable for output by a first color output device; and calibrating the color transformation unit to transform the device-independent digital representation of the color image within the existing color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 4
Independent Claim
148 words
A method for employing an existing color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a device-independent digital representation of a color image within an existing color space into a first output device-dependent digital representation suitable for output by a first color output device; and calibrating the color transformation unit to transform the device-independent digital representation of the color image within the existing color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 5
Independent Claim
119 words
A method for employing a noncolorimetric color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within a noncolorimetric color space; and calibrating the color transformation unit to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the noncolorimetric color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 6
Independent Claim
119 words
A method for employing a noncolorimetric color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within a noncolorimetric color space; and calibrating the color transformation unit to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the noncolorimetric color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 7
Dependent Claim
32 words
A method according to claim 2 and also comprising the step of generating an analog representation of the color image from the first output device-dependent digital representation using the first output device.
Claim 8
Independent Claim
184 words
A method for employing an existing color space to mix-and -match at least one color input device and at least one color output device comprising the steps of: calibrating a color transformation unit to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within an existing color space; and calibrating the color transformation unit to transform the device-independent digital representation of a color image within the existing color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance to the first analog representation of the color image, within the limitations of the at least one color input device and the at least one color output device.
Claim 9
Independent Claim
184 words
A method for employing an existing color space to mix-and -match at least one color input device and at least one color output device comprising the steps of: calibrating a color transformation unit to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within an existing color space; and calibrating the color transformation unit to transform the device-independent digital representation of a color image within the existing color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance to the first analog representation of the color image, within the limitations of the at least one color input device and the at least one color output device.
Claim 10
Dependent Claim
19 words
A method according to claim 5 wherein the at least one input device comprises a plurality of input devices.
Claim 11
Dependent Claim
22 words
A method according to claim 5 or claim 6 wherein the at least one output device comprises a plurality of output devices.
Claim 12
Dependent Claim
75 words
A method according to claim 1 or claim 3 and also comprising the steps of: calibrating the color transformation unit to transform at least one of the first and second device-independent digital representation of the color image within the color space into an output device-dependent digital representation suitable for output by a color output device; and employing the output device to generate an analog representation of the color image from the output device-dependent digital representation.
Claim 13
Independent Claim
23 words
A method according to any of the preceding claims 1 and 5 - 8 wherein the input device comprises a desktop input device.
Claim 14
Independent Claim
23 words
A method according to any of the preceding claims 2 and 4 - 8 wherein the output device comprises a desktop output device.
Claim 15
Independent Claim
24 words
A method according to any of the preceding claims wherein said color image comprises any individual one of a broad spectrum of color images.
Claim 16
Dependent Claim
25 words
A method according to claim 11 wherein said color image comprises any individual one of a group of color images comprising sunstantially all color images.
Claim 17
Independent Claim
28 words
A method according to any of the preceding claims wherein the existing color space comprises a high-end color space in which high-quality color transformations may be carried out.
Claim 18
Dependent Claim
17 words
Amethod according to claim 13 wherein the high-end color space comprises the Scitex Smart Scanner color space.
Claim 19
Dependent Claim
54 words
A method according to claim 2 or claim 4 and wherein the device-independent digital representation is provided by performing the following step: calibrating the color transformation unit to transform an input device-dependent digital representation of a color image generated by a color input device into a device-independent digital representation within the existing color space.
Claim 20
Independent Claim
20 words
A method according to any of the preceding claims wherein said color space comprises an industry accepted proprietary color space.
Claim 21
Independent Claim
19 words
A method according to any of the preceding claims wherein said color space comprises a non- colorimetric color space.
Claim 22
Independent Claim
148 words
A method for employing a noncolorimetric color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a device-independent digital representation of a color image within a noncolorimetric color space into a first output device-dependent digital representation suitable for output by a first color output device; and calibrating the color transformation unit to transform the device-independent digital representation of the color image within the noncolorimetric color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 23
Independent Claim
148 words
A method for employing a noncolorimetric color space as a color independent color space comprising the steps of: calibrating a color transformation unit to transform a device-independent digital representation of a color image within a noncolorimetric color space into a first output device-dependent digital representation suitable for output by a first color output device; and calibrating the color transformation unit to transform the device-independent digital representation of the color image within the noncolorimetric color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 24
Independent Claim
181 words
A method for employing a noncolorimetric color space to mix-and-match at least one color input device and at least one color output device comprising the steps of: calibrating a color transformation unit to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within a noncolorimetric color space; and calibrating the color transformation unit to transform the device-independent digital representation of a color image within the noncolorimetric color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively are substantially identical in appearance, within the limitations of the at least one input device and the at least one output device, to the first analog representation of the color image.
Claim 25
Independent Claim
181 words
A method for employing a noncolorimetric color space to mix-and-match at least one color input device and at least one color output device comprising the steps of: calibrating a color transformation unit to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within a noncolorimetric color space; and calibrating the color transformation unit to transform the device-independent digital representation of a color image within the noncolorimetric color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively are substantially identical in appearance, within the limitations of the at least one input device and the at least one output device, to the first analog representation of the color image.
Claim 26
Independent Claim
88 words
A method for determining characteristics of a target color input device relative to a reference color input device comprising the steps of: employing the target color input device to read an analog database, thereby to generate a first digital representation of the analog database; and comparing the first digital representation of the analog database to a digitally stored second digital representation of the analog database, wherein the second digital representation of the analog database was generated by employing the reference color input device to read the analog database.
Claim 27
Independent Claim
88 words
A method for determining characteristics of a target color input device relative to a reference color input device comprising the steps of: employing the target color input device to read an analog database, thereby to generate a first digital representation of the analog database; and comparing the first digital representation of the analog database to a digitally stored second digital representation of the analog database, wherein the second digital representation of the analog database was generated by employing the reference color input device to read the analog database.
Claim 28
Independent Claim
96 words
A method for replacing a first color independent color space employed in a color independent color processing system with a second color independent color space, the color independent color processing system comprising a color transformation unit for linking a plurality of color processing devices to the first color independent color space, the method comprising the step of: constructing a transformation for transforming digital representations of color images in an individual one of said first and second color independent color spaces into digital representations in the other one of said first and second color independent color spaces.
Claim 29
Independent Claim
96 words
A method for replacing a first color independent color space employed in a color independent color processing system with a second color independent color space, the color independent color processing system comprising a color transformation unit for linking a plurality of color processing devices to the first color independent color space, the method comprising the step of: constructing a transformation for transforming digital representations of color images in an individual one of said first and second color independent color spaces into digital representations in the other one of said first and second color independent color spaces.
Claim 30
Dependent Claim
26 words
A method according to claim 1 or claim 3 wherein at least one of said first and second color processing devices comprises a color input device.
Claim 31
Dependent Claim
33 words
A method according to claim 1 or claim 3 wherein at least one of said first and second color processing devices comprises a creative device for synthetically generating digital representations of color images.
Claim 32
Dependent Claim
134 words
Apparatus for employing an existing color space as a color independent color space comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within an existing color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation u nit so as to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the existing color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 33
Dependent Claim
134 words
Apparatus for employing an existing color space as a color independent color space comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within an existing color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation u nit so as to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the existing color space, wherein the first and second device-independent d ig ital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 34
Dependent Claim
164 words
Apparatus for employing an existing color space as a color independent color space comprising: a first device-independent/device-dependent color manipulation unit operative to calibrate a color transformation unit so as to transform a device-independent digital representation of a color image within an existing color space into a first output device-dependent digital representation suitable for output by a first color output device; and a second device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of the color image within the existing color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 35
Dependent Claim
164 words
Apparatus for employing an existing color space as a color independent color space comprising: a first device-independent/device-dependent color manipulation unit operative to calibrate a color transformation unit so as to transform a device-independent digital representation of a color image within an existing color space into a first output device-dependent digital representation suitable for output by a first color output device; and a second device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of the color image within the existing color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 36
Dependent Claim
133 words
Apparatus for employing a noncolorimetric color space as a color independent color space comprising: a first device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within a noncolorimetric color space; and a second device-dependent/device-independent color manipulation unit operative to calibrate the color transformation unit so as to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the noncolorimetric color space, wherein the first and second device-independent digital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 37
Dependent Claim
133 words
Apparatus for employing a noncolorimetric color space as a color independent color space comprising: a first device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform a first color processing device-dependent digital representation of a color image generated by a first color processing device into a first device-independent digital representation within a noncolorimetric color space; and a second device-dependent/device-independent color manipulation unit operative to calibrate the color transformation unit so as to transform a second color processing device-dependent digital representation of the color image generated by a second color processing device into a second device-independent digital representation within the noncolorimetric color space, wherein the first and second device-independent digital representations of the color image are substantially identical, within the limitations of the first and second color processing devices.
Claim 38
Dependent Claim
197 words
Apparatus for employing an existing color space to mix-and-match at least one color input device and at least one color output device, the apparatus comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within the existing color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of a color image within the existing colorspace into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance, within the limitations of the at least one input device and the at least one output device, to t he first analog representation of the color image.
Claim 39
Dependent Claim
197 words
Apparatus for employing an existing color space to mix-and-match at least one color input device and at least one color output device, the apparatus comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within the existing color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of a color image within the existing colorspace into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance, within the limitations of the at least one input device and the at least one output device, to t he first analog representation of the color image.
Claim 40
Dependent Claim
164 words
Apparatus for employing a noncolorimetric color space as a color independent color space comprising: a first device-independent/device-dependent color manipulation unit operative to calibrate a color transformation unit so as to transform a device-independent digital representation of a color image within a noncolorimetric color space into a first output device-dependent digital representation suitable for output by a first color output device; and a second device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of the color image within the noncolorimetric color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 41
Dependent Claim
164 words
Apparatus for employing a noncolorimetric color space as a color independent color space comprising: a first device-independent/device-dependent color manipulation unit operative to calibrate a color transformation unit so as to transform a device-independent digital representation of a color image within a noncolorimetric color space into a first output device-dependent digital representation suitable for output by a first color output device; and a second device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of the color image within the noncolorimetric color space into a second output device-dependent digital representation suitable for output by a second color output device, wherein an analog representation of the color image generated from the first output device-dependent digital representation by the first output device is substantially identical in appearance, within the limitations of the first and second output devices, to an analog representation of the color image generated from the second output device-dependent digital representation by the second output device.
Claim 42
Dependent Claim
199 words
Apparatus for employing a noncolorimetric color space to mix-and-match at least one color input device and at least one color output device, the apparatus comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within a noncolorimetric color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of a color image within the noncolorimetric color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance, within the limitations of the at least one color input device and the at least one color output device, to the first analog representation of the color image.
Claim 43
Dependent Claim
199 words
Apparatus for employing a noncolorimetric color space to mix-and-match at least one color input device and at least one color output device, the apparatus comprising: a device-dependent/device-independent color manipulation unit operative to calibrate a color transformation unit so as to transform at least one input device-dependent digital representation of at least one color images respectively generated by the at least one color input devices respectively from a first analog representation of the at least one color images respectively into a device-independent digital representation within a noncolorimetric color space; and a device-independent/device-dependent color manipulation unit operative to calibrate the color transformation unit so as to transform the device-independent digital representation of a color image within the noncolorimetric color space into at least one output device-dependent digital representation suitable for output by the at least one color output device, wherein at least one analog representations of the color image generated from the at least one output device-dependent digital representations respectively by the at least one output devices respectively is substantially identical in appearance, within the limitations of the at least one color input device and the at least one color output device, to the first analog representation of the color image.
Claim 44
Dependent Claim
64 words
Apparatus for determining characteristics of a target color input device relative to a reference color input device comprising: a digital comparing unit operative to compare a first digital representation of the analog database, generated by the target color input device, to a digitally stored second digital representation of the analog database, generated by employing the reference color input device to read the analog database.
Claim 45
Dependent Claim
64 words
Apparatus for determining characteristics of a target color input device relative to a reference color input device comprising: a digital comparing unit operative to compare a first digital representation of the analog database, generated by the target color input device, to a digitally stored second digital representation of the analog database, generated by employing the reference color input device to read the analog database.
Claim 46
Dependent Claim
98 words
Apparatus for replacing a first color independent color space employed in a color independent color processing system with a second color independent color space, the color independent color processing system comprising a color transformation unit for linking a plurality of color processing devices to the first color independent color space, the apparatus comprising: a device-independent/device-independent transformation unit operative to construct a transformation which transforms digital representations of color images in an individual one of said first and second color independent color spaces into digital representations in the other one of said first and second color independent color spaces.
Claim 47
Dependent Claim
98 words
Apparatus for replacing a first color independent color space employed in a color independent color processing system with a second color independent color space, the color independent color processing system comprising a color transformation unit for linking a plurality of color processing devices to the first color independent color space, the apparatus comprising: a device-independent/device-independent transformation unit operative to construct a transformation which transforms digital representations of color images in an individual one of said first and second color independent color spaces into digital representations in the other one of said first and second color independent color spaces.
Claim 48
Dependent Claim
52 words
A method according to claim 1 or claim 3 wherein said first step of calibrating comprises the step of storing a first transformation for transforming the first device-dependent digital representation and the second step of calibrating comprises the step of additionally storing a second transformation for transforming the second device-dependent digital representation.
Claim 49
Dependent Claim
56 words
A method according to claim 2 or claim 18 wherein said first step of calibrating comprises the step of storing a first transformation for transforming into the first output device-dependent digital representation and the second step of calibrating comprises the step of also storing a second transformation for transforming into the second output device-dependent digital representation.
Claim 50
Dependent Claim
51 words
A method according to claim 5 or claim 19 wherein said first step of calibrating comprises the step of storing a first transformation for transforming the input device-dependent digital representation and the second step of calibrating comprises the step of additionally storing a second transformation for transforming the device-independent digital representation.
Claim 51
Independent Claim
26 words
A method according to any of claims 32 - 34 wherein said steps of storing each comprise the step of storing a transformation as a LUT.
Claim 52
Independent Claim
76 words
A method according to any of claims 1, 3 and 32 wherein the color transformation unit is operative to transform a plurality of second color processing device-dependent digital representations of the color image generated respectively by a corresponding plurality of second color processing devices into a plurality of second device-independent digital representations within the color space, respectively, which are all substantially identical to the first device-independent digital representation within the limitations of the color processing devices.
Claim 53
Independent Claim
96 words
A method according to any of claims 2, 18 and 33 wherein the color transformation is operative to transform the device-independent representation into a plurality of second output device-dependent digital representations suitable for output by a corresponding plurality of second output devices, and wherein the analog representations generated from the plurality of second output device-dependent digital representations by the corresponding plurality of second output devices respectively are each substantially identical in appearance to the analog representation generated from the first output device-dependent digital representation by the first output device, within the limitations of the output devices.
Claim 54
Independent Claim
55 words
A method according to any of claims 5, 19 and 34 wherein the at least one device-dependent digital representation comprises a plurality of device-dependent digital representations, the at least one color input device comprises a plurality of color input devices and the at least one color output device comprises a plurality of color output devices.
References Cited (Backward Citations)
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