Image processing apparatus, image processing system, image processing method, and computer-readable storage medium
First Claim
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1. An image processing apparatus comprising:
- a histogram creation unit for creating a pixel value histogram of an objective image; and
an extraction unit for extracting a pixel value at a boundary between a predetermined region and another region of the objective image by approximating by a bended line formed from two straight lines a predetermined range of the histogram created by said histogram creation unit.
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Abstract
An image processing apparatus creates a pixel value histogram of an objective image, and approximates a predetermined range of the created histogram by a bended line formed from two straight lines. Then the apparatus extracts a pixel value at a boundary between a predetermined region and another region of the objective image in accordance with the approximation.
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Citations
23 Claims
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1. An image processing apparatus comprising:
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a histogram creation unit for creating a pixel value histogram of an objective image; and
an extraction unit for extracting a pixel value at a boundary between a predetermined region and another region of the objective image by approximating by a bended line formed from two straight lines a predetermined range of the histogram created by said histogram creation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22)
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20. An image processing method comprising steps of:
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creating a pixel value histogram of an objective image; and
extracting a pixel value at a boundary between a predetermined region and another region of the objective image by approximating by a bended line formed from two straight lines a predetermined range of the histogram created in the step of creating the histogram. - View Dependent Claims (23)
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Specification