US5627916A
Expired / Lapsed
US
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Image processing method and apparatus
Assignee: Canon Inc
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Filing: 1994-12-06
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Granted: 1997-05-06
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Expires: 2014-12-06
Abstract
Abstract An image processing system in which image data is generated in an offset sampled structure using a two-dimensional sensor. The generated image data is separated into a plurality of sets of image data having a lattice arrangement, and each of which has the same color. One set of the image data is coded in accordance with a first coding parameter, and another set of the image data is coded in accordance with a second coding parameter. The two sets of coded data are then stored in a memory for subsequent transfer to an image output device.
Inventors
- 👤 Izuru Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:54
CPC Classifications
G; G06; G06T; G06T9/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
139 words
An image processing method comprising: a generating step for generating image data by using a sensor which has a plurality of picture cells and color filters which are arranged as a predetermined array; a separating step for separating the image data generated in said generating step into a plurality of image components, each of the plurality of image components corresponding to each of said color filters; a setting step for setting quantization parameters suitable for obtaining an objective coding amount, in accordance with a predetermined image component separated in said separating step; a first coding step for coding the predetermined image component in accordance with the quantization parameters set in said setting step; and a second coding step for coding another image component separated in said separating step in accordance with the quantization parameters set in said setting step.
Claim 2
Dependent Claim
139 words
An image processing method comprising: a generating step for generating image data by using a sensor which has a plurality of picture cells and color filters which are arranged as a predetermined array; a separating step for separating the image data generated in said generating step into a plurality of image components, each of the plurality of image components corresponding to each of said color filters; a setting step for setting quantization parameters suitable for obtaining an objective coding amount, in accordance with a predetermined image component separated in said separating step; a first coding step for coding the predetermined image component in accordance with the quantization parameters set in said setting step; and a second coding step for coding another image component separated in said separating step in accordance with the quantization parameters set in said setting step.
Claim 3
Dependent Claim
61 words
The image processing method according to claim 1, wherein said first coding step includes: a dividing step for dividing the image data into a plurality of blocks; a transform step for performing an orthogonal transform on said plurality of blocks of image data; and a quantizing step for quantizing orthogonal transform coefficients obtained in said transform step with the quantization parameters.
Claim 4
Dependent Claim
20 words
The image processing method according to claim 2, wherein said transform step is performed by using a discrete cosine transform.
Claim 5
Dependent Claim
61 words
The image processing method according to claim 2, wherein said second coding step includes: a dividing step for dividing the image data into a plurality of blocks; a transform step for performing an orthogonal transform on said plurality of blocks of image data; and a quantizing step for quantizing orthogonal transform coefficients obtained in said transform step with the quantization parameters.
Claim 6
Dependent Claim
25 words
The image processing method according to claim 4, wherein said transform step of said second coding step is performed by using a discrete cosine transform.
Claim 7
Dependent Claim
17 words
The image processing method according to claim 1, wherein said sensor is of the Bayer type arrangement.
Claim 8
Dependent Claim
26 words
The image processing method according to claim 1, wherein the plurality of image components comprise a plurality of pixels each having high correlation with each other.
Claim 9
Dependent Claim
130 words
An image processing apparatus comprising: a sensor for generating image data, said sensor having a plurality of picture cells and color filters which are arranged as a predetermined array; separating means for separating the image data generated by said sensor into a plurality of image components, each of the plurality of image components corresponding to each of said color filters; setting means for setting quantization parameters suitable for obtaining an objective coding amount, in accordance with a predetermined image component separated by said separating means; first coding means for coding the predetermined image component in accordance with the quantization parameters set by said setting means; and second coding means for coding another image component separated by said separating means in accordance with the quantization parameters set by said setting means.
Claim 10
Dependent Claim
130 words
An image processing apparatus comprising: a sensor for generating image data, said sensor having a plurality of picture cells and color filters which are arranged as a predetermined array; separating means for separating the image data generated by said sensor into a plurality of image components, each of the plurality of image components corresponding to each of said color filters; setting means for setting quantization parameters suitable for obtaining an objective coding amount, in accordance with a predetermined image component separated by said separating means; first coding means for coding the predetermined image component in accordance with the quantization parameters set by said setting means; and second coding means for coding another image component separated by said separating means in accordance with the quantization parameters set by said setting means.
Claim 11
Dependent Claim
58 words
The image processing apparatus according to claim 8, wherein said first coding means includes: dividing means for dividing the image data into a plurality of blocks; transform means for performing an orthogonal transform on said plurality of blocks of image data; and quantizing means for quantizing orthogonal transform coefficients obtained by said transform means with the quantization parameters.
Claim 12
Dependent Claim
17 words
The image processing apparatus according to claim 9, wherein said transform means performs a discrete cosine transform.
Claim 13
Dependent Claim
58 words
The image processing apparatus according to claim 8, wherein said second coding means includes: dividing means for dividing the image data into a plurality of blocks; transform means for performing an orthogonal transform on said plurality of blocks of image data; and quantizing means for quantizing orthogonal transform coefficients obtained by said transform means with said quantization parameters.
Claim 14
Dependent Claim
22 words
The image processing apparatus according to claim 11, wherein said transform means of said second coding means performs a discrete cosine transform.
Claim 15
Dependent Claim
17 words
The image processing apparatus according to claim 8, wherein said sensor is of the Bayer type arrangement.
Claim 16
Dependent Claim
28 words
The image processing apparatus according to claim 8, wherein the image data coded by said first coding means and second coding means is stored into a memory card.
Claim 17
Dependent Claim
26 words
The image processing apparatus according to claim 8, wherein the plurality of image components comprise a plurality of pixels each having high correlation with each other.
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