Monotone conversion process for color images
First Claim
Patent Images
1. An image processing method for performing monotone conversion of color image data, the method comprising the steps of:
- (a) analyzing the color image data to create color distribution information relating to color bias in the color image data;
(b) adjusting, based on the color distribution information, a brightness conversion equation that is to be used in brightness conversion to convert pixel values of the color image data into pixel brightness values of monotone image data; and
(c) executing the brightness conversion in accordance with the adjusted brightness conversion equation.
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Abstract
A brightness conversion equation for producing monotone image data from color image data is adjusted based on color distribution information relating to color bias of the color image data, or operating mode information associated with the color image data. The adjusted brightness conversion equation is used to convert pixel values of the color image data into pixel values representing pixel brightness in monotone image data.
29 Citations
13 Claims
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1. An image processing method for performing monotone conversion of color image data, the method comprising the steps of:
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(a) analyzing the color image data to create color distribution information relating to color bias in the color image data;
(b) adjusting, based on the color distribution information, a brightness conversion equation that is to be used in brightness conversion to convert pixel values of the color image data into pixel brightness values of monotone image data; and
(c) executing the brightness conversion in accordance with the adjusted brightness conversion equation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image processing device for performing monotone conversion of color image data, the device comprising:
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a data processing module for creating monotone image data from the color image data, wherein the data processing module includes;
a converting module for converting pixel values of the color image data into pixel brightness values of monotone image data according to a brightness conversion equation;
an image data analyzing module for the color image data to create color distribution information relating to color bias in the color image data; and
a brightness conversion equation adjusting module for adjusting the brightness conversion equation based on the color distribution information.
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8. A computer program product for performing monotone conversion of color image data, the computer program product comprising:
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a computer readable medium; and
a computer program stored on the computer readable medium, the computer program including;
a first computer program code for causing a computer to analyze the color image data to create color distribution information relating to color bias in the color image data;
a second computer program code for causing the computer to adjust, based on the color distribution information, a brightness conversion equation that is to be used in brightness conversion to convert pixel values of the color image data into pixel brightness values of monotone image data; and
a third computer program code for causing the computer to execute the brightness conversion in accordance with the adjusted brightness conversion equation.
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9. An image processing method for performing monotone conversion of color image data, using color image data which has been generated by an image generating device and image data-related information which is associated with the color image data and which includes operating mode information pertaining to an operating mode of the image generating device at the time the color image data is generated, the method comprising the steps of:
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(a) analyzing the operating mode information to determine the operating mode;
(b) adjusting, based on the operating mode, a brightness conversion equation that is to be used in brightness conversion to convert pixel values of the color image data into pixel brightness values of monotone image data; and
(c) executing the brightness conversion in accordance with the adjusted brightness conversion equation. - View Dependent Claims (10, 11)
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12. An image processing device for performing monotone conversion of color image data, using color image data which has been generated by an image generating device and image data-related information which is associated with the color image data and which includes operating mode information pertaining to an operating mode of the image generating device at the time the color image data is generated, the image device comprising:
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a data processing module for creating monotone image data from the color image data and the operating mode information, wherein the data processing module includes;
a converting module for converting pixel values of the color image data into pixel brightness values of monotone image data according to a brightness conversion equation;
an operating mode determining module for analyzing the operating mode information to determine the operating mode; and
a brightness conversion equation adjusting module for adjusting the brightness conversion equation based on the operating mode determined by the operating mode determining module.
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13. A computer program product for performing monotone conversion of color image data, using color image data which has been generated by an image generating device and image data-related information which is associated with the color image data and which includes operating mode information pertaining to an operating mode of the image generating device at the time the color image data is generated, the computer program product comprising:
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a computer readable medium; and
a computer program stored on the computer readable medium, the computer program including;
a first computer program code for causing a computer to analyze the operating mode information to determine the operating mode;
a second computer program code for causing the computer to adjust, based on the operating mode, a brightness conversion equation that is to be used in brightness conversion to convert pixel values of the color image data into pixel brightness values of monotone image data; and
a third computer program code for causing the computer to execute the brightness conversion in accordance with the adjusted brightness conversion equation.
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Specification