US5353130A
Expired / Lapsed
US
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Color image processing apparatus
Assignee: Canon Inc
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Filing: 1991-12-26
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Granted: 1994-10-04
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Expires: 2011-12-26
Abstract
Abstract An original area of a color original placed on an original base is accurately detected. Color component signals of R, G and B generated by a line sensor 1-1 are converted into a lightness component L* and a chromatic component C*. Latch circuits 1-12 through 1-15 use these two components to detect the original area of the color original present on the original base.
Inventors
- 👤 Akiko Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:59
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00681; H04N1/00684; H04N1/00724; H04N1/00729; H04N1/00734; H04N1/00737; H04N1/00742; H04N1/0075; H04N1/00753; H04N1/00763; H04N1/00766; H04N1/46
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
88 words
A color image processing apparatus comprising: input means for inputting a plurality of color component signals representing a color original; extracting means for extracting a chromatic signal from the plurality of color component signals; detecting means for detecting an area where the color original is present in accordance with the chromatic signal extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until a plurality of color component signals for one color original is input by said input means.
Claim 2
Dependent Claim
88 words
A color image processing apparatus comprising: input means for inputting a plurality of color component signals representing a color original; extracting means for extracting a chromatic signal from the plurality of color component signals; detecting means for detecting an area where the color original is present in accordance with the chromatic signal extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until a plurality of color component signals for one color original is input by said input means.
Claim 3
Dependent Claim
23 words
A color image processing apparatus according to claim 1, wherein said input means comprises an image reader which employs a CCD line sensor.
Claim 4
Dependent Claim
22 words
A color image processing apparatus according to claim 1, wherein said plurality of color component signals are Red, Green and Blue signals.
Claim 5
Dependent Claim
17 words
A color image processing apparatus according to claim 1, wherein said chromatic signal is a saturation signal.
Claim 6
Dependent Claim
17 words
A color image processing apparatus according to claim 1, wherein said chromatic signal is a hue signal.
Claim 7
Dependent Claim
24 words
A color image processing apparatus according to claim 1, wherein said detecting means performs detection for each block consisting of a plurality of pixels.
Claim 8
Dependent Claim
31 words
A color image processing apparatus according to claim 1, further comprising processing means for processing said color original in accordance with the results of the detection made by said detecting means.
Claim 9
Dependent Claim
30 words
A color image processing apparatus according to claim 7, wherein said processing means has at least a function selected from paper size selection, auto-zooming, center shift and original edge erasing.
Claim 10
Dependent Claim
98 words
A color original reading apparatus comprising: a platen for supporting a color original; input means for scanning a surface of said platen and for generating a plurality of color components signals; extracting means for extracting a chromatic signal from the plurality of color component signals; detecting means for detecting presence or absence of the color original on said platen in accordance with the chromatic signal extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until scanning of the surface of the platen by said input means is complete.
Claim 11
Dependent Claim
98 words
A color original reading apparatus comprising: a platen for supporting a color original; input means for scanning a surface of said platen and for generating a plurality of color components signals; extracting means for extracting a chromatic signal from the plurality of color component signals; detecting means for detecting presence or absence of the color original on said platen in accordance with the chromatic signal extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until scanning of the surface of the platen by said input means is complete.
Claim 12
Dependent Claim
23 words
A color original reading apparatus according to claim 9, wherein said input means comprises an image reader which employs a CCD line sensor.
Claim 13
Dependent Claim
22 words
A color original reading apparatus according to claim 9, wherein said plurality of color component signals are Red, Green and Blue signals.
Claim 14
Dependent Claim
17 words
A color original reading apparatus according to claim 9, wherein said chromatic signal is a saturation signal.
Claim 15
Dependent Claim
17 words
A color original reading apparatus according to claim 9, wherein said chromatic signal is a hue signal.
Claim 16
Dependent Claim
24 words
A color original reading apparatus according to claim 9, wherein said detecting means performs detection for each block consisting of a plurality of pixels.
Claim 17
Dependent Claim
31 words
A color original reading apparatus according to claim 9, further comprising processing means for processing the color original in accordance with the results of the detection made by said detecting means.
Claim 18
Dependent Claim
30 words
A color original reading apparatus according to claim 15, wherein said processing means has at least a function selected from paper size selection, auto-zooming, center shift and original edge erasing.
Claim 19
Dependent Claim
73 words
A color original reading apparatus comprising: a platen for supporting a color original; input means for scanning a surface of the platen and for generating a plurality of color component signals; extracting means for extracting a chromatic signal from the plurality of color component signals; and detecting means for detecting a size of the color original on the surface of the platen in accordance with the chromatic signal extracted by said extracting means.
Claim 20
Dependent Claim
73 words
A color original reading apparatus comprising: a platen for supporting a color original; input means for scanning a surface of the platen and for generating a plurality of color component signals; extracting means for extracting a chromatic signal from the plurality of color component signals; and detecting means for detecting a size of the color original on the surface of the platen in accordance with the chromatic signal extracted by said extracting means.
Claim 21
Dependent Claim
23 words
A color original reading apparatus according to claim 17, wherein said input means comprises an image reader which employs a CCD line sensor.
Claim 22
Dependent Claim
22 words
A color original reading apparatus according to claim 17, wherein said plurality of color component signals are Red, Green and Blue signals.
Claim 23
Dependent Claim
17 words
A color original reading apparatus according to claim 17, wherein said chromatic signal is a saturation signal.
Claim 24
Dependent Claim
17 words
A color original reading apparatus according to claim 17, wherein said chromatic signal is a hue signal.
Claim 25
Dependent Claim
24 words
A color original reading apparatus according to claim 17, wherein said detecting means performs detection for each block consisting of a plurality of pixels.
Claim 26
Dependent Claim
24 words
A color original reading apparatus according to claim 17, further comprising memory means for storing the results of the detection by said detecting means.
Claim 27
Dependent Claim
33 words
A color original reading apparatus according to claim 23, wherein said memory means stores the detection result at least until scanning of the surface of the platen by said input means is complete.
Claim 28
Dependent Claim
31 words
A color original reading apparatus according to claim 17, further comprising processing means for processing the color original in accordance with the results of the detection made by said detecting means.
Claim 29
Dependent Claim
30 words
A color original reading apparatus according to claim 25, wherein said processing means has at least a function selected from paper size selection, auto-zooming, center shift and original edge erasing.
Claim 30
Dependent Claim
101 words
A color image processing apparatus comprising: input means for inputting a plurality of color component signals representing a color original; extracting means for extracting a plurality of signals, one of which is a chromatic signal or a monochromatic signal, from the plurality of color component signals; detecting means for detecting an area where the color original is present in accordance with the plurality of signals extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until a plurality of color component signals for one color original is input by said input means.
Claim 31
Dependent Claim
101 words
A color image processing apparatus comprising: input means for inputting a plurality of color component signals representing a color original; extracting means for extracting a plurality of signals, one of which is a chromatic signal or a monochromatic signal, from the plurality of color component signals; detecting means for detecting an area where the color original is present in accordance with the plurality of signals extracted by said extracting means; and memory means for storing a detection result of said detecting means at least until a plurality of color component signals for one color original is input by said input means.
Claim 32
Dependent Claim
23 words
A color image processing apparatus according to claim 27, wherein said input means comprises an image reader which employs a CCD line sensor.
Claim 33
Dependent Claim
22 words
A color image processing apparatus according to claim 27, wherein said plurality of color component signals are Red, Green and Blue signals.
Claim 34
Dependent Claim
17 words
A color image processing apparatus according to claim 27, wherein said chromatic signal is a saturation signal.
Claim 35
Dependent Claim
17 words
A color image processing apparatus according to claim 27, wherein said chromatic signal is a hue signal.
Claim 36
Dependent Claim
24 words
A color image processing apparatus according to claim 27, wherein said detecting means performs detection for each block consisting of a plurality of pixels.
Claim 37
Dependent Claim
31 words
A color image processing apparatus according to claim 27, further comprising processing means for processing the color original in accordance with the results of the detection made by said detecting means.
Claim 38
Dependent Claim
30 words
A color image processing apparatus according to claim 33, wherein said processing means has at least a function selected from paper size selection, auto-zooming, center shift and original edge erasing.
Claim 39
Dependent Claim
23 words
A color image processing apparatus according to claim 27, wherein the plurality of signals extracted by said extracting means includes a lightness signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |