Image processing apparatus, image processing method, and recording medium with image processing program to process image according to input image
First Claim
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1. An image processing apparatus comprising:
- a reception unit receiving image data, an extraction unit to extract a first region from said received image data, a calculation unit to calculate a background amount of said extracted first region, and a correction unit to correct a second region of said image data according to said calculated background amount.
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Abstract
An image processing apparatus includes a reception unit receiving image data, a region determination unit to extract a text region from the received image data, a threshold value calculation unit to calculate the background amount of the extracted text region, and an image correction unit to correct a non-text region of the image data according to the calculated background amount. Since the non-text region of the image data is corrected according to the background amount of the text region, an appropriate correction process can be applied on the image data according to difference in the paper sheet quality and image pickup condition.
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Citations
13 Claims
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1. An image processing apparatus comprising:
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a reception unit receiving image data, an extraction unit to extract a first region from said received image data, a calculation unit to calculate a background amount of said extracted first region, and a correction unit to correct a second region of said image data according to said calculated background amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
a threshold value calculation unit to calculate a threshold value according to said calculated background amount, and an edge detection unit obtaining an edge of the second region in said received image data according to said calculated threshold value. -
9. The image processing apparatus according to claim 8, wherein said first region includes a text image region, and said second region includes a line copy image region.
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10. The image processing apparatus according to claim 1, wherein said correction unit includes a threshold value calculation unit calculating a threshold of color distance according to said calculated background amount, and
a subtractive color processing unit subtracting color of said second region in said received image data according to said calculated threshold value of color distance. -
11. The image processing apparatus according to claim 10, wherein said first region includes a text image region, and said second region includes a line copy image region.
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12. An image processing method comprising the steps of:
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receiving image data, extracting a first region from said received image data, calculating a background amount of said extracted first region, and correcting a second region of said image data according to said calculated background amount.
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13. A computer-readable recording medium recorded with an image processing program for a computer to execute the steps of:
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receiving image data, extracting a first region from said received image data, calculating a background amount of said extracted first region, and correcting a second region of said image data according to said calculated background amount.
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Specification