US5465164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing method and device for the same
Assignee: Canon Inc
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Filing: 1992-04-14
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Granted: 1995-11-07
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Expires: 2012-04-14
Abstract
Abstract Disclosed is an image processing device which comprises a conversion means for converting an image data to a space frequency component, a quantization means for quantizing the space frequency component converted by the conversion means, and a control means for controlling the quantization means so that a quantization error produced when the converted space frequency component is quantized by the quantization means is diffused to nearby space frequency components.
Inventors
- 👤 Susumu Sugiura
- 👤 Yoshinobu Mita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:29
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/90; H04N19/10; H04N19/102; H04N19/124; H04N19/126; H04N19/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
An image processing method for processing image data arranged in image blocks, comprising the step of: converting image data to a space frequency component for each image block; and diffusing a quantization error produced by quantizing a space frequency component of an image block to another space frequency component of the same image block.
Claim 2
Dependent Claim
54 words
An image processing method for processing image data arranged in image blocks, comprising the step of: converting image data to a space frequency component for each image block; and diffusing a quantization error produced by quantizing a space frequency component of an image block to another space frequency component of the same image block.
Claim 3
Dependent Claim
77 words
An image processing device for processing image data arranged in image blocks, comprising: conversion means for converting image data to a space frequency component for each image block; quantization means for quantizing said space frequency component converted by said conversion means; and control means for controlling said quantization means so that a quantization error produced by quantizing the space frequency component of an image block is diffused to another space frequency component of the same image block.
Claim 4
Dependent Claim
77 words
An image processing device for processing image data arranged in image blocks, comprising: conversion means for converting image data to a space frequency component for each image block; quantization means for quantizing said space frequency component converted by said conversion means; and control means for controlling said quantization means so that a quantization error produced by quantizing the space frequency component of an image block is diffused to another space frequency component of the same image block.
Claim 5
Dependent Claim
21 words
An image processing method according to claim 1, wherein said quantization error is multi-dimensionally diffused to said other space frequency components.
Claim 6
Dependent Claim
18 words
An image processing method according to claim 1, further comprising the step of quantizing said space frequency component.
Claim 7
Dependent Claim
23 words
An image processing method according to claim 1, further comprising the step of assigning a Huffman code to said quantized space frequency component.
Claim 8
Dependent Claim
17 words
An image processing method according to claim 1, further comprising the step of transmitting said Huffman code.
Claim 9
Dependent Claim
51 words
An image processing method, comprising the steps of: converting image data having a first number of bits to image data having a lesser number of bits; and diffusing an error produced in said conversion process to nearby image data and then converting the error-diffused image data into frequency component image data.
Claim 10
Dependent Claim
51 words
An image processing method, comprising the steps of: converting image data having a first number of bits to image data having a lesser number of bits; and diffusing an error produced in said conversion process to nearby image data and then converting the error-diffused image data into frequency component image data.
Claim 11
Dependent Claim
19 words
An image processing method according to claim 7, wherein the first converting step is an ADCT image compression/extension processing.
Claim 12
Dependent Claim
67 words
An image processing method for processing image data arranged in blocks, wherein the method is used in an ADCT image compression/extension processing, comprising the steps of converting image data to a space frequency component for each image block, quantizing a converted space frequency component and diffusing a quantized error produced by quantizing a space frequency component of a block to another frequency component of the image block.
Claim 13
Dependent Claim
67 words
An image processing method for processing image data arranged in blocks, wherein the method is used in an ADCT image compression/extension processing, comprising the steps of converting image data to a space frequency component for each image block, quantizing a converted space frequency component and diffusing a quantized error produced by quantizing a space frequency component of a block to another frequency component of the image block.
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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) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |