Apparatus and method for automatically computing gamma correction curve
First Claim
1. Apparatus for automatically computing a gamma correction curve, comprising:
- an image obtaining unit for receiving an input image data of a color chart through an image interface;
a coordinate calculating unit for measuring input brightness values of a plurality of ROIs (Regions of Interest) in the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and
a curve computing unit for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve.
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Abstract
The present invention relates to apparatus and method for automatically computing a gamma correction curve. The apparatus according to the present invention comprises an image obtaining unit for receiving an input image data of a color chart through an image interface; a coordinate calculating unit for measuring input brightness values of a plurality of ROIs (Regions of Interest) of the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and a curve computing unit for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve.
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Citations
27 Claims
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1. Apparatus for automatically computing a gamma correction curve, comprising:
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an image obtaining unit for receiving an input image data of a color chart through an image interface; a coordinate calculating unit for measuring input brightness values of a plurality of ROIs (Regions of Interest) in the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and a curve computing unit for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for automatically computing a gamma correction curve comprising:
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an image obtaining step for receiving an input image data of a color chart through an image interface; a coordinate calculating step for measuring input brightness values of a plurality of ROIs in the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and a curve computing step for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A computer readable medium stored thereon a method for automatically computing a gamma correction curve, the method comprising:
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an image obtaining step for receiving an input image data of a color chart through an image interface; a coordinate calculating step for measuring input brightness values of a plurality of ROIs in the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and a curve computing step for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve.
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Specification