Image processing apparatus, image processing system, image processing method, and computer-readable storage medium
First Claim
Patent Images
1. An image processing apparatus comprising:
- creating means for creating a histogram on the basis of values of pixels in objective image data;
first approximating means for approximating values of pixels included within a first image value range by using a first line;
second approximating means for approximating values of pixels included within a second image value range by using a second line;
determining means for determining as a representative value, a value of a pixel corresponding to an intersecting point of the first line and the second line; and
a sensor for converting a radiation ray which has passed through an object to the objective image data,wherein the first pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is incident, and the second pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is directly incident.
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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
9 Claims
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1. An image processing apparatus comprising:
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creating means for creating a histogram on the basis of values of pixels in objective image data; first approximating means for approximating values of pixels included within a first image value range by using a first line; second approximating means for approximating values of pixels included within a second image value range by using a second line; determining means for determining as a representative value, a value of a pixel corresponding to an intersecting point of the first line and the second line; and a sensor for converting a radiation ray which has passed through an object to the objective image data, wherein the first pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is incident, and the second pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is directly incident. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An image processing method comprising:
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a creating step of creating a histogram on the basis of values of pixels in objective image data; a first approximating step of approximating values of pixels included within a first image value range by using a first line; a second approximating step of approximating values of pixels included within a second image value range by using a second line; a determining step of determining as a representative value, a value of a pixel corresponding to an intersecting point of the first line and the second line; and a converting step of converting a radiation ray which has passed through an object to the objective image data, wherein the first pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is incident, and the second pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is directly incident.
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9. A computer-readable storage medium storing a computer-executable program, the program comprising code for:
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a creating step of creating a histogram on the basis of values of pixels in objective image data; a first approximating step of approximating values of pixels included within a first image value range by a using first line; a second approximating step of approximating values of pixels included within a second image value range by a using second line; a determining step of determining as a representative value, a value of a pixel corresponding to an intersecting point of the first line and the second line; and a converting step of converting a radiation ray which has passed through an object to the objective image data, wherein the first pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is incident, and the second pixel value range is a range including values of pixels within an area on the sensor onto which the radiation ray is directly incident.
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Specification