US5006937A
Expired / Lapsed
US
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Imaging data processing apparatus
Assignee: Canon Inc
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Filing: 1990-07-27
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Granted: 1991-04-09
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Expires: 2010-07-27
Abstract
Abstract An image processing apparatus includes input circuitry for inputting an analog video signal, first conversion circuitry for converting the input analog video signal into multi-value data, and a memory for storing the multi-value data. Second conversion circuitry is provided for converting the multi-value data stored in the memory to binary data when executing its conversion process. The second conversion circuitry (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns in response to the detected density gradient.
Inventors
- 👤 Hiroshi Nonoshita
- 👤 Seiji Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:21
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/3872; H04N1/40; H04N1/405; H04N1/4055
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
Image processing apparatus comprising: input means for inputting an analog video signal; first conversion means for converting the input analog video signal into multi-value data; memory means for storing the multi-value data; and second conversion means for converting the multi-value data stored in said memory means to binary data when executing its conversion process, wherein said second conversion means (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns, in response to the detected density gradient.
Claim 2
Dependent Claim
108 words
Image processing apparatus comprising: input means for inputting an analog video signal; first conversion means for converting the input analog video signal into multi-value data; memory means for storing the multi-value data; and second conversion means for converting the multi-value data stored in said memory means to binary data when executing its conversion process, wherein said second conversion means (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns, in response to the detected density gradient.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1, further comprising additional memory means for storing the plurality of image patterns comprising binary data.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 1, wherein said input means comprises a TV camera.
Claim 5
Dependent Claim
22 words
An apparatus according to claim 1, wherein said input means comprises a magnetic recording unit in which analog video signals are recorded.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 1, wherein said output means comprises a CRT display.
Claim 7
Dependent Claim
13 words
An apparatus according to claim 1, wherein said output means comprises a printer.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 1, further comprising additional memory means for storing binary data comprising the binary data converted by said second conversion means.
Claim 9
Dependent Claim
53 words
An apparatus according to claim 1, wherein said second conversion means comprises (1) matrix memory means for storing in matrix form a plurality of pixel data comprising the multi-value data, and (2) means for comparing the pixel data stored in said matrix memory means with each other and for detecting the density gradient.
Claim 10
Dependent Claim
113 words
An image processing apparatus comprising: input circuitry for inputting an analog video signal; first conversion circuitry for converting the analog video signal input by said input circuitry into multi-value data; a memory for storing the multi-value data converted by said first conversion circuitry; and second conversion circuitry for converting the multi-value data stored in said memory into binary data, wherein said second conversion circuitry (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns in response to the detected density gradient.
Claim 11
Dependent Claim
113 words
An image processing apparatus comprising: input circuitry for inputting an analog video signal; first conversion circuitry for converting the analog video signal input by said input circuitry into multi-value data; a memory for storing the multi-value data converted by said first conversion circuitry; and second conversion circuitry for converting the multi-value data stored in said memory into binary data, wherein said second conversion circuitry (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns in response to the detected density gradient.
Claim 12
Dependent Claim
21 words
An apparatus according to claim 9, further comprising an additional memory for storing the plurality of image patterns comprising binary data.
Claim 13
Dependent Claim
26 words
An apparatus according to claim 9, further comprising an additional memory means for storing binary data comprising the binary data converted by said second conversion circuitry.
Claim 14
Dependent Claim
52 words
An apparatus according to claim 9, wherein said second conversion circuitry comprises (1) a matrix memory for storing in matrix form a plurality of pixel data comprising the multi-value data, and (2) means for comparing the pixel data stored in said matrix memory with each other and for detecting the density gradient.
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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) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |