Patent US9232109B2 successfully refreshed from Google Patents.
US9232109B2
Active / In Force
US
⏱️ 7.8 years remaining
Image processing apparatus and image processing method specifying a type of original based on whether a high frequency component is included in an acquired spatial frequency feature including a feature of fiber of an original
Assignee: Canon Inc
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Filing: 2014-08-21
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Granted: 2016-01-05
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Expires: 2034-08-21
Abstract
Abstract Because the spectral characteristics of an original of a printing sheet and those of an original of a photographic image are different, in the case where the same color conversion table is applied at the time of color conversion processing, a deviation occurs in color reproducibility. By determining the sheet type with accuracy based on the feature of fiber that occurs in manufacture of paper and by applying color conversion processing in accordance with the determination result, a highly accurate color reproduction method of an image is implemented.
Inventors
- 👤 Tetsuya Suwa
- 👤 Yugo Mochizuki
- 👤 Masao Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:25
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/409; H04N1/4097
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
101 words
An image processing apparatus comprising: a memory configured to store a program; a processor configured to execute the program stored in the memory; wherein the processor acquires a spatial frequency feature including a feature of fiber of an original in a read image obtained by a reading device reading the original, wherein the processor determines whether a high frequency component which corresponds to a frequency equal to or higher than a predetermined frequency and is included in the acquired spatial frequency feature, has directivity, and wherein the processor specifies a type of the original based on a result of the determination.
Claim 2
Dependent Claim
101 words
An image processing apparatus comprising: a memory configured to store a program; a processor configured to execute the program stored in the memory; wherein the processor acquires a spatial frequency feature including a feature of fiber of an original in a read image obtained by a reading device reading the original, wherein the processor determines whether a high frequency component which corresponds to a frequency equal to or higher than a predetermined frequency and is included in the acquired spatial frequency feature, has directivity, and wherein the processor specifies a type of the original based on a result of the determination.
Claim 3
Dependent Claim
56 words
The image processing apparatus according to claim 1 , wherein the processor further determines whether the high frequency component is included in the acquired spatial frequency feature, and determines whether the high frequency component has directivity in a case where it is determined that the high frequency component is included in the acquired spatial frequency feature.
Claim 4
Dependent Claim
36 words
The image processing apparatus according to claim 1 , wherein the processor determines whether the high frequency component corresponds to directional properties of fiber in the original, based on whether the high frequency component has directivity.
Claim 5
Dependent Claim
48 words
The image processing apparatus according to claim 1 , wherein the processor detects a region corresponding to a portion in the original from the read image to which a printing material is not applied, and wherein the processor acquires the spatial frequency feature corresponding to the detected region.
Claim 6
Dependent Claim
37 words
The image processing apparatus according to claim 1 , wherein the processor specifies the type of the original is as a photographic paper in a case where it is determined that the high frequency component lacks directivity.
Claim 7
Dependent Claim
40 words
The image processing apparatus according to claim 1 , wherein the processor determines whether the high frequency component has directivity, based on a flatness of a power spectrum distribution in a spatial frequency image of the acquired spatial frequency feature.
Claim 8
Dependent Claim
47 words
The image processing apparatus according to claim 6 , wherein the processor determines that the high frequency component has directivity in a case where the flatness of the power spectrum distribution in the spatial frequency image is equal to or more than a predetermined flatness threshold value.
Claim 9
Dependent Claim
39 words
The image processing apparatus according to claim 4 , wherein the processor detects a region in which an average luminance value is equal to or more than a predetermined luminance threshold value of the read image as the region.
Claim 10
Dependent Claim
29 words
The image processing apparatus according to claim 1 , wherein the processor performs color conversion processing for the read image in accordance with the specified type of the original.
Claim 11
Dependent Claim
38 words
The image processing apparatus according to claim 9 , wherein the processor sets a color conversion table in accordance with the type of the original and performs the color conversion processing by using the set color conversion table.
Claim 12
Dependent Claim
54 words
The image processing apparatus according to claim 1 , wherein the processor roughly detects the type of the original based on a color reproduction range of the read image, wherein in a case where the processor cannot detect the type of the original, the processor specifies the type of original based on the determination.
Claim 13
Dependent Claim
44 words
The image processing apparatus according to claim 11 , wherein the color reproduction range of the read image includes at least one of the maximum value of a chroma of the read image and the minimum value of a luminosity of the read image.
Claim 14
Dependent Claim
44 words
The image processing apparatus according to claim 12 , wherein the processor detects the original as a photographic image in a case where the maximum value of the chroma of the read image is equal to or more than a predetermined chroma threshold value.
Claim 15
Dependent Claim
44 words
The image processing apparatus according to claim 12 , wherein the processor detects the original as a photographic image in a case where the minimum value of the luminosity of the read image is equal to or less than a predetermined luminosity threshold value.
Claim 16
Dependent Claim
36 words
The image processing apparatus according to claim 1 , wherein the processor specifies the type of the original as a plain paper in a case where it is determined that the high frequency component has directivity.
Claim 17
Dependent Claim
50 words
The image processing apparatus according to claim 3 , wherein the processor determines whether fiber is included in the original, whether the high frequency component corresponds to directional properties of fiber in the original, and specifies the type of the original, based on whether fiber is included in the original.
Claim 18
Dependent Claim
104 words
An image processing method performed by a processor by executing a program stored in a memory, the method comprising: an acquisition step of acquiring a spatial frequency feature indicating a feature of fiber of an original in a read image obtained by a reading device reading the original; a determining step of determining whether a high frequency component which corresponds to a frequency equal or higher than a predetermined frequency and is included in the spatial frequency feature acquired in the acquisition step, has directivity; and a specification step of specifying a type of the original based on the determination in the determination step.
Claim 19
Dependent Claim
104 words
An image processing method performed by a processor by executing a program stored in a memory, the method comprising: an acquisition step of acquiring a spatial frequency feature indicating a feature of fiber of an original in a read image obtained by a reading device reading the original; a determining step of determining whether a high frequency component which corresponds to a frequency equal or higher than a predetermined frequency and is included in the spatial frequency feature acquired in the acquisition step, has directivity; and a specification step of specifying a type of the original based on the determination in the determination step.
Claim 20
Dependent Claim
117 words
A non-transitory computer readable storage medium storing a program for causing a computer to perform as the image processing apparatus comprising: a memory configured to store a program; a processor configured to execute the program stored in the memory; wherein the processor acquires a spatial frequency feature including a feature of fiber of an original in a read image obtained by a reading device reading the original, wherein the processor determines whether a high frequency component which corresponds to a frequency equal to or higher than a predetermined frequency and is included in the acquired spatial frequency feature, has directivity, and wherein the processor specifies a type of the original based on a result of the determination.
Claim 21
Dependent Claim
117 words
A non-transitory computer readable storage medium storing a program for causing a computer to perform as the image processing apparatus comprising: a memory configured to store a program; a processor configured to execute the program stored in the memory; wherein the processor acquires a spatial frequency feature including a feature of fiber of an original in a read image obtained by a reading device reading the original, wherein the processor determines whether a high frequency component which corresponds to a frequency equal to or higher than a predetermined frequency and is included in the acquired spatial frequency feature, has directivity, and wherein the processor specifies a type of the original based on a result of the determination.
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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) | 2019-01-04 | 2019-07-06 | 2020-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2023-01-04 | 2023-07-06 | 2024-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2027-01-04 | 2027-07-06 | 2028-01-05 | $7700.00 | Pending Window |