Patent US4375237A successfully refreshed from Google Patents.
EP0487282A2
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Image processing apparatus
Assignee: Canon Inc
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Filing: 1991-11-18
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Granted: —
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Expires: 2011-11-18
Abstract
Abstract An image processing apparatus comprises: discriminating means for discriminating an effective size of input image data; compressing means for compressing the input image data; and means for controlling a compressing state of the compressing means in accordance with the effective size discriminated by the discriminating means.
Inventors
- 👤 Joji c/o Canon Kabushiki Kaisha Ohki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:41
CPC Classifications
H; H04; H04N; H04N19/00; H04N1/00; H04N1/41; H04N1/32; H04N1/333; H04N1/33307; H04N1/33323; H04N19/10; H04N19/102; H04N19/124; H04N19/126; H04N19/42; H04N19/423; H04N19/13; H04N19/60; H04N19/90; H04N19/91; H04N2201/00; H04N2201/32; H04N2201/333; H04N2201/33307; H04N2201/33314; H04N2201/33321; H04N2201/33342; H04N2201/33357
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
46 words
An image processing apparatus comprising: discriminating means for discriminating an effective size of input image data; compressing means for compressing said input image data; and means for controlling a compressing state of the compressing means in accordance with the effective size discriminated by the discriminating means.
Claim 2
Dependent Claim
30 words
An apparatus according to claim 1, wherein said discriminating means discriminates data indicative of a size of said input image data which is supplied together with the input image data.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein said discriminating means discriminates the designated size in the input image data.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 1, wherein said compressing means compresses the data by executing an orthogonal transformation of said input image data.
Claim 5
Dependent Claim
29 words
An apparatus according to claim 4, wherein said control means controls the compressing state by controlling a quantization value to quantize the data after completion of the orthogonal transformation.
Claim 6
Dependent Claim
18 words
An apparatus according to claim 1, further comprising means for storing the data compressed by the compressing means.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 6, further comprising means for expanding the compressed data stored in the storing means.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 6, further comprising means for supplying the compressed data stored in the storing means to a printer.
Claim 9
Dependent Claim
30 words
An apparatus according to claim 1, wherein said discriminating means discriminates a total size of a plurality of input images in the case where a plurality of input images exist.
Claim 10
Dependent Claim
42 words
An image processing apparatus comprising: compressing means for compressing input image data; a memory to store the data compressed by the compressing means; and means for controlling a compressing state of said compressing means in accordance with a capacity of said memory.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 10, wherein said capacity is a space capacity.
Claim 12
Dependent Claim
23 words
An apparatus according to claim 10, wherein said compressing means compresses the data by executing an orthogonal transformation of said input image data.
Claim 13
Dependent Claim
29 words
An apparatus according to claim 12, wherein said control means controls the compressing state by controlling a quantization value to quantize the data after completion of the orthogonal transformation.
Claim 14
Dependent Claim
19 words
An apparatus according to claim 10, further comprising means for expanding the compressed data stored in the storing means.
Claim 15
Dependent Claim
22 words
An apparatus according to claim 10, further comprising means for supplying the compressed data stored in the storing means to a printer.
Claim 16
Dependent Claim
67 words
An image processing apparatus comprising: compressing means for compressing input image data; means for allowing said compressing means to compress a part of the input image data without compressing the whole input image data; and means for controlling a compressing state of the compressing means on the basis of the result in which said part of the input image data has been compressed by the compressing means.
Claim 17
Dependent Claim
29 words
An apparatus according to claim 16, wherein said part of the input image data is a part of blocks which are obtained by spatially dividing the input image data.
Claim 18
Dependent Claim
23 words
An apparatus according to claim 16, wherein said compressing means compresses the data by executing an orthogonal transformation of said input image data.
Claim 19
Dependent Claim
29 words
An apparatus according to claim 18, wherein said control means controls the compressing state by controlling a quantization value to quantize the data after completion of the orthogonal transformation.
Claim 20
Dependent Claim
18 words
An apparatus according to claim 16, further comprising means for storing the data compressed by the compressing means.
Claim 21
Dependent Claim
19 words
An apparatus according to claim 20, further comprising means for expanding the compressed data stored in the storing means.
Claim 22
Dependent Claim
22 words
An apparatus according to claim 16, further comprising means for supplying the compressed data stored in the storing means to a printer.
Claim 23
Dependent Claim
96 words
An image processing apparatus which receives compressed image data and can store the compressed image data into storing means, comprising: discriminating means for discriminating a data size of the compressed image data; means for expanding the compressed image data to the image data before the compression in thecase where it is determined that the data size of the compressed image data discriminated by said discriminating means is larger than a memory size of said storing means; and compressing means for again compressing the expanded image data so that it can be stored into the storing means.
Claim 24
Dependent Claim
18 words
An apparatus according to claim 23, further comprising means for storing the data compressed by the compressing means.
Claim 25
Dependent Claim
22 words
An apparatus according to claim 23, further comprising means for supplying the compressed data stored in the storing means to a printer.
Claim 26
Dependent Claim
33 words
An apparatus according to claim 25, wherein said recompression is achieved by controlling compressing state is by means of controlling a quantization value to qunatize the data after completion of an orthogonal transformation.
Claim 27
Independent Claim
66 words
A method and apparatus for compressing image data having compression means (7) for compressing an image by a first compression ratio; characterised by said compression means being arranged to compress said image by a second compression ratio, and discriminating means (5) for determining the size of an image and for selecting said first compression ratio or said second compression ratio on the basis of said determination.
References Cited (Backward Citations)
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