US5355232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image size change in conjunction with coding and decoding
Assignee: Canon Inc
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Filing: 1991-08-09
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Granted: 1994-10-11
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Expires: 2011-08-09
Abstract
Abstract An image processing method and apparatus in which image data is divided into blocks each containing a plurality of pixels and is coded and decoded on the basis of such blocks. When the image data is enlarged or reduced, enlargement is conducted before the coding and decoding, while reduction is performed after coding and decoding, whereby quantization errors caused by the coding and decoding is minimized.
Inventors
- 👤 Tatsuhito Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:00
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007; G06T9/00; H; H04; H04N; H04N1/00; H04N1/46; H04N1/64; H04N1/646
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
88 words
An image processing apparatus comprising: input means for inputting image data; image enlarging means for enlarging an image represented by the image data input by said input means; and coding means for coding the image data output from said image enlarging means, wherein said coding means performs information non-preserving type coding and said image enlarging means enlarges the image before coding by said coding means in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 2
Dependent Claim
88 words
An image processing apparatus comprising: input means for inputting image data; image enlarging means for enlarging an image represented by the image data input by said input means; and coding means for coding the image data output from said image enlarging means, wherein said coding means performs information non-preserving type coding and said image enlarging means enlarges the image before coding by said coding means in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 3
Dependent Claim
16 words
An image processing apparatus according to claim 1, wherein the image data is color image data.
Claim 4
Dependent Claim
24 words
An image processing apparatus according to claim 2, wherein said coding means codes the color image data into codes of a color specification system.
Claim 5
Dependent Claim
26 words
An image processing apparatus according to claim 1, wherein said input means comprises an image reader for scanning an original image and generating the image data.
Claim 6
Dependent Claim
17 words
An image processing apparatus according to claim 1, wherein the information non-preservation type coding is data quantization.
Claim 7
Dependent Claim
125 words
An image processing apparatus comprising: image enlarging means for enlarging an image represented by image data; coding means for coding the image data output from said image enlarging means by using information non-preserving type coding; decoding means for decoding coded image data; and reducing means for reducing in size an image represented by the image data decoded by said decoding means, wherein, when said apparatus enlarges the image, said image enlarging means enlarges the image before coding by said coding means, and when said apparatus reduces the image in size, said reducing means reduces the image after decoding by said decoding means, in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 8
Dependent Claim
125 words
An image processing apparatus comprising: image enlarging means for enlarging an image represented by image data; coding means for coding the image data output from said image enlarging means by using information non-preserving type coding; decoding means for decoding coded image data; and reducing means for reducing in size an image represented by the image data decoded by said decoding means, wherein, when said apparatus enlarges the image, said image enlarging means enlarges the image before coding by said coding means, and when said apparatus reduces the image in size, said reducing means reduces the image after decoding by said decoding means, in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 9
Dependent Claim
16 words
An image processing apparatus according to claim 6, wherein the image data is color image data.
Claim 10
Dependent Claim
24 words
An image processing apparatus according to claim 7, wherein said coding means codes the color image data into codes of a color specification system.
Claim 11
Dependent Claim
34 words
An image processing apparatus according to claim 6, further comprising storage means for storing the image data coded by said coding means, said decoding means decoding the image data read from said storage means.
Claim 12
Dependent Claim
17 words
An image processing apparatus according to claim 6, wherein said coding means performs information non-preserving type coding.
Claim 13
Dependent Claim
17 words
An image processing apparatus according to claim 10, wherein the information non-preserving type coding is data quantization.
Claim 14
Dependent Claim
20 words
An image processing apparatus according to claim 6, further comprising image forming means for forming an image on the image.
Claim 15
Dependent Claim
18 words
An image processing apparatus according to claim 12, wherein said image forming means comprises a laser beam printer.
Claim 16
Dependent Claim
81 words
An image processing method comprising the steps of: inputting image data; enlarging an image represented by the image data; and coding the image data representing an image enlarged in said enlarging step, wherein, in said coding step, information non-preserving type coding is performed, and the enlargement of the image is performed before the coding of the image data in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 17
Dependent Claim
81 words
An image processing method comprising the steps of: inputting image data; enlarging an image represented by the image data; and coding the image data representing an image enlarged in said enlarging step, wherein, in said coding step, information non-preserving type coding is performed, and the enlargement of the image is performed before the coding of the image data in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 18
Dependent Claim
109 words
An image processing method comprising the steps of: enlarging an image represented by image data; coding image data representing an image enlarged in said enlarging step by using information non-preserving type coding; decoding coded image data; and reducing in size an image represented by the image data decoded in said decoding step, wherein, when the image is enlarged, the enlargement is performed before coding of the image data, and when the image is reduced in size, the reduction is performed after decoding of the image data, in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
Claim 19
Dependent Claim
109 words
An image processing method comprising the steps of: enlarging an image represented by image data; coding image data representing an image enlarged in said enlarging step by using information non-preserving type coding; decoding coded image data; and reducing in size an image represented by the image data decoded in said decoding step, wherein, when the image is enlarged, the enlargement is performed before coding of the image data, and when the image is reduced in size, the reduction is performed after decoding of the image data, in order to prevent an image represented by the coded image data from deterioration which is caused by the information non-preserving type coding.
References Cited (Backward Citations)
US4536802A
Cited
US4958237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |