US5754682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture processing method and apparatus
Assignee: Sony Corp
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Filing: 1996-09-20
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Granted: 1998-05-19
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Expires: 2016-09-20
Abstract
Abstract A picture processing apparatus in which the color appearance of a soft copy image and that of a hard copy picture coincide with each other with high precision despite difference in the optical environment. A first conversion unit 12 is responsive to the optical environmental parameters specifying a picture handled by an input device 3 to convert picture data from the input device 3 corresponding to a picture handled by the input device 3 into index data for color appearance associated with the appearance under the ambient light. A second conversion unit 14 is responsive to the optical environmental parameters specifying the luminance of the ambient light in which to observe the picture handled by the output device 4 to convert the color appearance index data obtained by the first conversion unit 12 so that the color appearance under the ambient light will be coincident with the color appearance under the ambient light under which to view the picture handled by the input device 3. The resulting appearance index data is sent to an output device 14.
Inventors
- 👤 Naoya Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:23
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6083; H04N1/6086; G; G06; G06T; G06T5/00; G06T5/90; G06T5/92; H04N1/603; H04N1/6052; H04N1/6088; G06T2207/00; G06T2207/10; G06T2207/10004; G06T2207/10008; G06T2207/10024
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A method for processing picture data between an input device and an output device both handling pictures, said picture data being transmitted from the input device to the output device, wherein, responsive to the luminance of the ambient light for observing the picture handled by the input device, the picture data corresponding to the picture handled by the input device is converted into index data for color appearance matching the color appearance under the ambient light, by way of performing a first conversion operation, and wherein, responsive to the luminance of the ambient light for viewing the picture handled by the output device, said index data for color appearance is converted so that the color appearance under said ambient light will be coincident with the color appearance under the ambient light for viewing the picture handled by the input device, by way of performing a second conversion operation.
Claim 2
Independent Claim
148 words
A method for processing picture data between an input device and an output device both handling pictures, said picture data being transmitted from the input device to the output device, wherein, responsive to the luminance of the ambient light for observing the picture handled by the input device, the picture data corresponding to the picture handled by the input device is converted into index data for color appearance matching the color appearance under the ambient light, by way of performing a first conversion operation, and wherein, responsive to the luminance of the ambient light for viewing the picture handled by the output device, said index data for color appearance is converted so that the color appearance under said ambient light will be coincident with the color appearance under the ambient light for viewing the picture handled by the input device, by way of performing a second conversion operation.
Claim 3
Dependent Claim
35 words
The picture processing method as claimed in claim 1 wherein at least one of the input device and the output device self-emits the light for a soft copy picture and outputs the soft copy picture.
Claim 4
Dependent Claim
36 words
The picture processing method as claimed in claim 2 wherein said first conversion is correction of the contrast of the soft copy picture responsive to the reflection of the ambient light by the soft copy picture.
Claim 5
Dependent Claim
36 words
The picture processing method as claimed in claim 1 wherein said first conversion is correction for chromatic adaptation of the visual sense of the human being by weighting responsive to the luminance of the ambient light.
Claim 6
Dependent Claim
19 words
The picture processing method as claimed in claim 1 wherein said first conversion is correction for the Hunt effect.
Claim 7
Independent Claim
148 words
An apparatus for processing picture data between an input device and an output device both handling pictures, said picture data being transmitted from the input device to the output device, comprising: first conversion means for converting the picture data corresponding to the picture handled by the input device into index data for color appearance matching the color appearance under the ambient light responsive to optical environmental parameters specifying luminance of the ambient light in which to observe the picture handled by said input device; and second conversion means for converting said index data for color appearance obtained by said first conversion means responsive to the luminance of the ambient light for viewing the picture handled by the output device, so that the color appearance under said ambient light will be coincident with the color appearance under the ambient light for viewing the picture handled by the input device.
Claim 8
Independent Claim
148 words
An apparatus for processing picture data between an input device and an output device both handling pictures, said picture data being transmitted from the input device to the output device, comprising: first conversion means for converting the picture data corresponding to the picture handled by the input device into index data for color appearance matching the color appearance under the ambient light responsive to optical environmental parameters specifying luminance of the ambient light in which to observe the picture handled by said input device; and second conversion means for converting said index data for color appearance obtained by said first conversion means responsive to the luminance of the ambient light for viewing the picture handled by the output device, so that the color appearance under said ambient light will be coincident with the color appearance under the ambient light for viewing the picture handled by the input device.
Claim 9
Dependent Claim
35 words
The picture processing apparatus as claimed in claim 6 wherein at least one of the input device and the output device self-emits the light for a soft copy picture and outputs the soft copy picture.
Claim 10
Dependent Claim
35 words
The picture processing apparatus as claimed in claim 7 wherein said first conversion is correction of the contrast of the soft copy picture responsive to reflection of the ambient light by the soft copy picture.
Claim 11
Dependent Claim
36 words
The picture processing apparatus as claimed in claim 6 wherein said first conversion is correction for chromatic adaptation of the visual sense of the human being by weighting responsive to the luminance of the ambient light.
Claim 12
Dependent Claim
19 words
The picture processing apparatus as claimed in claim 6 wherein said first conversion is correction for the Hunt effect.
References Cited (Backward Citations)
US4500919A
Cited
US5532848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-18 | 2001-11-17 | 2002-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-18 | 2005-11-17 | 2006-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-18 | 2009-11-17 | 2010-05-19 | $7700.00 | Window Closed / Lapsed |