EP0218447A2
Expired / Lapsed
EP
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Image signal processing apparatus
Assignee: Canon Inc
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Filing: 1986-09-30
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Granted: —
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Expires: 2006-09-30
Abstract
Abstract An image signal processing apparatus includes a contact type line image sensor as an image reading unit, an original table, an image processing circuit, a trimming circuit, and an original recognition circuit including D flip-flops and white detection circuits. The contact type line image sensor reads an image signal including original and nonoriginal area images. The white detection circuits in the original recognition circuit detect the original area for each line or every plurality of lines on the basis of the image signal input at the image sensor. The D flip-flops in the original recognition circuit delay the image signal input at the image sensor. The trimming circuit extracts an image signal corresponding to the original area from an image signal delayed by the flip-flops, on the basis of a detection result of the white detection circuits.
Inventors
- 👤 Nao Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:46
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/38
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
87 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting the original area for each line or every plurality of lines on the basis of the image signal entered from said inputting means; means for delaying the image signal entered from said inputting means; and means for extracting an image signal corresponding to the original area from the image signal delayed by said delaying means, on the basis of a detection result of said detecting means.
Claim 2
Dependent Claim
87 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting the original area for each line or every plurality of lines on the basis of the image signal entered from said inputting means; means for delaying the image signal entered from said inputting means; and means for extracting an image signal corresponding to the original area from the image signal delayed by said delaying means, on the basis of a detection result of said detecting means.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein said detecting means detects a boundary between the original and nonoriginal areas.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 1, wherein said delaying means delays the image signal for a period of time which is sufficient for said detecting means to detect the original area.
Claim 5
Dependent Claim
22 words
An apparatus according to claim 1, wherein said detecting means detects a pixel position corresponding to an end of the original area.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein said inputting means comprises means for reading the image including the original and nonoriginal area images on a line basis.
Claim 7
Dependent Claim
94 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting a boundary between the original and nonoriginal areas for each line or every plurality of lines on the basis of the image signal entered from said inputting means; means for storing one-frame data representing the boundary detected by said detecting means; and means for extracting an image signal corresponding to the original area from the image signal entered from said inputting means, on the basis of the data stored in said storing means.
Claim 8
Dependent Claim
94 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting a boundary between the original and nonoriginal areas for each line or every plurality of lines on the basis of the image signal entered from said inputting means; means for storing one-frame data representing the boundary detected by said detecting means; and means for extracting an image signal corresponding to the original area from the image signal entered from said inputting means, on the basis of the data stored in said storing means.
Claim 9
Dependent Claim
25 words
An apparatus according to claim 6, wherein said storing means stores data representing a pixel position corresponding to the boundary detected by said detecting means.
Claim 10
Dependent Claim
25 words
An apparatus according to claim 6, wherein said storing means stores the data representing the boundary detected by said detecting means in association with lines.
Claim 11
Dependent Claim
27 words
An apparatus according to claim 6, wherein said inputting means comprises means for reading the image including the original and nonoriginal area images on a line basis.
Claim 12
Dependent Claim
91 words
An image signal processing apparatus comprising: means for reading an image signal including original and nonoriginal area images on a line basis; means for detecting the original area for each line or every plurality of lines on the basis of the image signal output from said reading means; means for delaying the image signal output from said reading means; and means for extracting an image signal corresponding to the original area from the image signal delayed by said delaying means, on the basis of a detection result of said detecting means.
Claim 13
Dependent Claim
91 words
An image signal processing apparatus comprising: means for reading an image signal including original and nonoriginal area images on a line basis; means for detecting the original area for each line or every plurality of lines on the basis of the image signal output from said reading means; means for delaying the image signal output from said reading means; and means for extracting an image signal corresponding to the original area from the image signal delayed by said delaying means, on the basis of a detection result of said detecting means.
Claim 14
Dependent Claim
19 words
An apparatus according to claim 10, wherein said detecting means detects a boundary between the original and nonoriginal areas.
Claim 15
Dependent Claim
31 words
An apparatus according to claim 10, wherein said delaying means delays the image signal for a period of time which is sufficient for said detecting means to detect the original area.
Claim 16
Dependent Claim
22 words
An apparatus according to claim 10, wherein said detecting means detects a pixel position corresponding to an end of the original area.
Claim 17
Dependent Claim
86 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting the original area on the basis of the image signal entered from said inputting means; means for storing data of the image area detected by said detecting means; means for correcting the image area data stored in said storing means; and means for processing the image signal entered from said inputting means on the basis of the image area data corrected by said correcting means.
Claim 18
Dependent Claim
86 words
An image signal processing apparatus comprising: means for inputting an image signal including original and nonoriginal area images; means for detecting the original area on the basis of the image signal entered from said inputting means; means for storing data of the image area detected by said detecting means; means for correcting the image area data stored in said storing means; and means for processing the image signal entered from said inputting means on the basis of the image area data corrected by said correcting means.
Claim 19
Dependent Claim
19 words
An apparatus according to claim 14, wherein said detecting means detects a boundary between the original and nonoriginal areas.
Claim 20
Dependent Claim
15 words
An apparatus according to claim 14, wherein said storing means stores one-frame image area data.
Claim 21
Dependent Claim
36 words
An apparatus according to claim 14, wherein said processing means extracts an image signal corresponding to the original area from the image signal entered from said input means, on the basis of the image area data.
References Cited (Backward Citations)
JPS59224976A
Cited
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