EP0434429A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image processing apparatus
Assignee: Canon Inc
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Filing: 1990-12-20
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Granted: —
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Expires: 2010-12-20
Abstract
Abstract The invention relates to an image processing apapratus having the function to encode or decode image data and discloses a technique in which an optimum encoding method is selected in accordance with the characteristics of an image and a high efficient encoding with little deterioration in image is executed.
Inventors
- 👤 Akihiro C/O Canon Kabushiki Kaisha Katakaya
- 👤 Yasuhiko Yasuda
- 👤 Shigeo Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 23:40
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/04; H04N11/042; H04N1/00; H04N1/46; H04N1/64; H04N1/642; H04N19/00; H04N19/10; H04N19/60; H04N19/61; H04N19/102; H04N19/13; H04N19/90; H04N19/91
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
68 words
An image encoding apparatus comprising: a) input means for inputting image data; b) discriminating means for discriminating to see if the image data which was input by the input means relates to edge data or not; and c) encoding means for encoding the image data which was input by the input means by different encoding methods in accordance with the result of the discrimination by the discriminating means.
Claim 2
Dependent Claim
27 words
An apparatus according to claim 1, wherein the input means is an image reading apparatus for scanning an original and converting into image data of every pixel.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein the input means is a host computer.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 1, wherein the discriminating means discriminates whether a block which is constructed by a plurality of pixels includes an edge or not every said block.
Claim 5
Dependent Claim
76 words
An apparatus according to claim 1, wherein the encoding means encodes by a first encoding method so as to raise a resolution for the data which was determined to be the edge data in the input image data and encodes by a second encoding method different from the first encoding method so as to raise a gradation for the data which was determined to be the data other than edge data in the input image data.
Claim 6
Dependent Claim
16 words
An apparatus according to claim 5, wherein the first encoding method is a block encoding method.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 5, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 8
Dependent Claim
15 words
An apparatus according to claim 7, wherein the orthogonal transformation is a discrete cosine transformation.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 1, further having memory means for storing the encoded data.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 1, further having transmitting means for transmitting the encoded data.
Claim 11
Dependent Claim
63 words
An image encoding method comprising the steps of: a) inputting step of inputting image data; b) encoding step of encoding the image data by different encoding methods in accordance with whether the image data which was input by the inputting step relates to edge data or not; and c) outputting step of outputting the image data which was encoded by the encoding step.
Claim 12
Dependent Claim
34 words
A method according to claim 11, wherein in the inputting step, the image data is input by using an image reading apparatus for scanning an original and converting into image data of every pixel.
Claim 13
Dependent Claim
20 words
A method according to claim 11, wherein in the inputting step, the image data from a host computer is input.
Claim 14
Dependent Claim
36 words
A method according to claim 11, wherein in the encoding step, a check is made to see if a block which is constructed by a plurality of pixels includes an edge or not every said block.
Claim 15
Dependent Claim
78 words
A method according to claim 11, wherein in the encoding step, the data which was determined to be the edge data in the input image data is encoded by a first encoding method so as to raise a resolution and the data which was determined to be the data other than the edge data in the input image data is encoded by a second encoding method different from the first encoding method so as to raise a gradation.
Claim 16
Dependent Claim
16 words
A method according to claim 15, wherein the first encoding method is a block encoding method.
Claim 17
Dependent Claim
19 words
A method according to claim 15, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 18
Dependent Claim
15 words
A method according to claim 17, wherein the orthogonal transformation is a discrete cosine transformation.
Claim 19
Dependent Claim
22 words
A method according to claim 11, further having the step of storing the encode data which was encoded by the encoding step.
Claim 20
Dependent Claim
22 words
A method according to claim 11, further having the transmitting step of transmitting the data which was output by the outputting step.
Claim 21
Dependent Claim
59 words
An image decoding apparatus comprising: a) input means for inputting image data which was encoded by a plurality of different encoding methods and edge information of the image data; b) decoding means for decoding the image data in accordance with the edge information; and c) output means for outputting the image data which was decoded by the decoding means.
Claim 22
Dependent Claim
53 words
An apparatus according to claim 21, wherein the image data which is input by the input means is data in which an edge portion was encoded by a first encoding method to raise a resolution and portions other than the edge portion were encoded by a second encoding method to raise a gradation.
Claim 23
Dependent Claim
16 words
An apparatus according to claim 22, wherein the first encoding method is a block encoding method.
Claim 24
Dependent Claim
19 words
An apparatus according to claim 22, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 25
Dependent Claim
15 words
An apparatus according to claim 24, wherein the orthogonal transformation is a discrete cosine transformation.
Claim 26
Dependent Claim
27 words
An apparatus according to claim 21, wherein the output means has image forming means for forming a visible image on the basis of the decoded image data.
Claim 27
Dependent Claim
15 words
An apparatus according to claim 26, wherein the image forming means includes a photosensitive material.
Claim 28
Dependent Claim
14 words
An apparatus according to claim 26, wherein the image forming means includes a display.
Claim 29
Dependent Claim
62 words
An image decoding method comprising the steps of: a) inputting step of inputting image data which was encoded by a plurality of different encoding methods and edge information of the image data; b) decoding step of decoding the image data in accordance with the edge information; and c) outputting step of outputting the image data which was decoded by the decoding step.
Claim 30
Dependent Claim
53 words
A method according to claim 29, wherein the image data which is input by the inputting step is data in which an edge portion was encoded by a first encoding method to raise a resolution and portions other than the edge portion were encoded by a second encoding method to raise a gradation.
Claim 31
Dependent Claim
16 words
A method according to claim 30, wherein the first encoding method is a block encoding method.
Claim 32
Dependent Claim
19 words
A method according to claim 30, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 33
Dependent Claim
15 words
A method according to claim 32, wherein the orthogonal transformation is a discrete cosine transformation.
Claim 34
Dependent Claim
28 words
A method according to claim 29, wherein the outputting step includes the step of forming a visible image of the decoded image data by visible image forming means.
Claim 35
Dependent Claim
15 words
A method according to claim 34, wherein the image forming step uses a photosensitive material.
Claim 36
Dependent Claim
14 words
A method according to claim 34, wherein the image forming step uses a display.
Claim 37
Dependent Claim
119 words
An image processing system comprising: a) input means for inputting image data; b) detecting means for detecting an edge portion in the image data which was input by the input means; c) encoding means for encoding the image data which was input by the input means by a different encoding method in accordance with the result of the detection by the detecting means; d) memory means for storing the image data which was encoded by the encoding means; e) decoding means for decoding the image data stored in the memory means in accordance with the result of the detection by the detecting means; and f) output means for outputting the image data which was decoded by the decoding means.
Claim 38
Dependent Claim
27 words
A system according to claim 37, wherein the input means is an image reading apparatus for scanning an original and converting into image data of every pixel.
Claim 39
Dependent Claim
14 words
A system according to claim 37, wherein the input means is a host computer.
Claim 40
Dependent Claim
31 words
A system according to claim 37, further comprising discriminating means for discriminating whether a block which is constructed by a plurality of pixels includes an edge or not every said block.
Claim 41
Dependent Claim
76 words
A system according to claim 37, wherein the encoding means encodes by a first encoding method so as to raise a resolution for the data which was determined to be the edge data in the input image data and encodes by a second encoding method different from the first encoding method so as to raise a gradation for the data which was determined to be the data other than edge data in the input image data.
Claim 42
Dependent Claim
16 words
A system according to claim 41, wherein the first encoding method is a block encoding method.
Claim 43
Dependent Claim
19 words
A system according to claim 41, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 44
Dependent Claim
15 words
A system according to claim 43, wherein the orthogonal transformation is a discrete cosine transformation.
Claim 45
Dependent Claim
27 words
A system according to claim 37, wherein the output means has image forming means for forming a visible image on the basis of the decoded image data.
Claim 46
Dependent Claim
15 words
A system according to claim 45, wherein the image forming means includes a photosensitive material.
Claim 47
Dependent Claim
14 words
A system according to claim 45, wherein the image forming means includes a display.
Claim 48
Dependent Claim
130 words
An image encoding apparatus comprising: a) input means for inputting image data; b) discriminating means for discriminating whether the image data which was input by the input means relates to an edge portion or not every block which is constructed by a plurality of pixels; c) first encoding means for encoding the block which was determined to be the edge portion by the discriminating means by a first encoding method; d) decoding means for decoding a code of the edge portion which was encoded by the first encoding means; and e) second encoding means for encoding difference data between the image data which was input by the input means and the code which was decoded by the decoding means by a second encoding method different from the first encoding method.
Claim 49
Dependent Claim
27 words
An apparatus according to claim 48, wherein the input means is an image reading apparatus for scanning an original and converting into image data of every pixel.
Claim 50
Dependent Claim
14 words
An apparatus according to claim 48, wherein the input means is a host computer.
Claim 51
Dependent Claim
16 words
An apparatus according to claim 48, wherein the first encoding method is a block encoding method.
Claim 52
Dependent Claim
19 words
An apparatus according to claim 48, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 53
Dependent Claim
15 words
An apparatus according to claim 48, further having memory means for storing the encoded data.
Claim 54
Dependent Claim
15 words
An apparatus according to claim 48, further having transmitting means for transmitting the encoded data.
Claim 55
Dependent Claim
70 words
A color image encoding apparatus comprising: a) input means for inputting a plurality of color component data; b) a plurality of encoding means for encoding each of said plurality of color component data which were input by the input means by different methods in accordance with the presence or absence of an edge; and c) output means for outputting the color component data which were encoded by the encoding means.
Claim 56
Dependent Claim
27 words
An apparatus according to claim 55, wherein the input means is an image reading apparatus for scanning an original and converting into image data of every pixel.
Claim 57
Dependent Claim
14 words
An apparatus according to claim 55, wherein the input means is a host computer.
Claim 58
Dependent Claim
31 words
An apparatus according to claim 55, further comprising discriminating means for discriminating whether a block which is constructed by a plurality of pixels includes an edge or not every said block.
Claim 59
Dependent Claim
76 words
An apparatus according to claim 55, wherein the encoding means encodes by a first encoding method so as to raise a resolution for the data which was determined to be the edge data in the input image data and encodes by a second encoding method different from the first encoding method so as to raise a gradation for the data which was determined to be the data other than edge data in the input image data.
Claim 60
Dependent Claim
16 words
An apparatus according to claim 59, wherein the first encoding method is a block encoding method.
Claim 61
Dependent Claim
19 words
An apparatus according to claim 59, wherein the second encoding method is an encoding method using an orthogonal transformation.
Claim 62
Dependent Claim
15 words
An apparatus according to claim 55, further having memory means for storing the encoded data.
Claim 63
Dependent Claim
15 words
An apparatus according to claim 55, further having transmitting means for transmitting the encoded data.
Claim 64
Independent Claim
31 words
A method of encoding image data in which image components of a first type are identified and encoded in a first way and other image components are encoded in another way.
Claim 65
Dependent Claim
18 words
A method according to claim 64, in which the image components of the first type comprise edge components.
Claim 66
Dependent Claim
47 words
A method according to claim 64 or claim 65, in which image components of the first type are identified for a portion of the image and are encoded in the first way, and remaining image components for the same portion of the image are processed another way.
References Cited (Backward Citations)
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