US5412486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing apparatus and method with dual mode encoding
Assignee: Canon Inc
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Filing: 1993-08-26
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Granted: 1995-05-02
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Expires: 2013-08-26
Abstract
Abstract An image processing apparatus receives first image data, and hierarchically reduces the size of the image represented by this first image data to generate second image data. An encoder generates encoded image data by encoding the second image data in a first mode, or by encoding the first image data in a second mode.
Inventors
- 👤 Yuuichi Bannai
- 👤 Tadashi Yoshida
- 👤 Yasuji Hirabayashi
- 👤 Hidefumi Oosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/3872; H04N1/3873; H04N1/3875; G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007; H04N1/32; H04N1/32101; H04N1/32128; H04N1/41; H04N1/411; H04N1/413; H04N1/417; H04N1/4172; H04N1/32106; H04N1/32112; H04N1/32122; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3202; H04N2201/3225; H04N2201/3226; H04N2201/3271; H04N2201/3274; H04N2201/3277
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
An image processing apparatus comprising: input means for inputting first image data representing an original image; first memory means for storing the first image data input by said input means; reduction means for hierarchically reducing a size of the image represented by the first image data to output second image data; second memory means for storing the second image data; and encoding means for encoding image data and generating encoded image data, wherein said encoding means has a first encoding mode in which encoding is performed on the second image data read out from said second memory means and a second encoding mode in which encoding is performed on the first image data read out from said first memory means without using the second image data output from said reduction means.
Claim 2
Dependent Claim
131 words
An image processing apparatus comprising: input means for inputting first image data representing an original image; first memory means for storing the first image data input by said input means; reduction means for hierarchically reducing a size of the image represented by the first image data to output second image data; second memory means for storing the second image data; and encoding means for encoding image data and generating encoded image data, wherein said encoding means has a first encoding mode in which encoding is performed on the second image data read out from said second memory means and a second encoding mode in which encoding is performed on the first image data read out from said first memory means without using the second image data output from said reduction means.
Claim 3
Dependent Claim
26 words
An image processing apparatus according to claim 1, wherein said encoding means uses a predetermined reference pixel at the time of encoding a pixel of interest.
Claim 4
Dependent Claim
25 words
An image processing apparatus according to claim 2, wherein said predetermined reference pixel is different between said first encoding mode and said second encoding mode.
Claim 5
Dependent Claim
17 words
An image processing apparatus according to claim 1, wherein said encoding means performs information preserving type encoding.
Claim 6
Dependent Claim
17 words
An image processing apparatus according to claim 4, wherein said information preserving type encoding is arithmetic encoding.
Claim 7
Dependent Claim
118 words
An image processing method comprising the steps of: inputting first image data representing an original image; storing the first image data in a first memory; hierarchically reducing a size of the image represented by the first image data to output second image data; storing the second image data in a second memory; and encoding image data and generating encoded image data, wherein said encoding step has a first encoding mode in which encoding is performed on the second image data read out from the second memory and a second encoding mode in which encoding is performed on the first image data read out from the first memory without using the second image data generated in said reduction step.
Claim 8
Dependent Claim
118 words
An image processing method comprising the steps of: inputting first image data representing an original image; storing the first image data in a first memory; hierarchically reducing a size of the image represented by the first image data to output second image data; storing the second image data in a second memory; and encoding image data and generating encoded image data, wherein said encoding step has a first encoding mode in which encoding is performed on the second image data read out from the second memory and a second encoding mode in which encoding is performed on the first image data read out from the first memory without using the second image data generated in said reduction step.
Claim 9
Dependent Claim
26 words
An image processing method according to claim 6, wherein said encoding step uses a predetermined reference pixel at the time of encoding a pixel of interest.
Claim 10
Dependent Claim
25 words
An image processing method according to claim 7, wherein said predetermined reference pixel is different between said first encoding mode and said second encoding mode.
Claim 11
Dependent Claim
17 words
An image processing method according to claim 6, wherein said encoding step performs information preserving type encoding.
Claim 12
Dependent Claim
17 words
An image processing method according to claim 9, wherein said information preserving type encoding is arithmetic encoding.
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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) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |