Image processing circuit, circuit device, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorsLoic Remi Robert Christian Michaut, Hideki Matsuda
Life of this patent
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Abstract
The image processing circuit includes a gamma correction circuit configured to perform a gamma correction on input image data using a look-up table, and then output output image data, an output image histogram calculation circuit configured to calculate an output image histogram, an input image histogram calculation circuit configured to calculate an input image histogram, a reference histogram calculation circuit configured to calculate a reference histogram from the input image histogram based on the look-up table, and a histogram comparison circuit configured to perform a comparison between the output image histogram and the reference histogram.
Claims10
An image processing circuit comprising:
- a gamma correction circuit configured to perform a gamma correction on input image data using a look-up table, and then output output image data;
- an output image histogram calculation circuit configured to calculate an output image histogram as a histogram of the output image data;
- an input image histogram calculation circuit configured to calculate an input image histogram as a histogram of the input image data;
- a reference histogram calculation circuit configured to calculate a reference histogram as an expected value of the output image histogram from the input image histogram based on the look-up table;
- and
- a histogram comparison circuit configured to perform a comparison between the output image histogram and the reference histogram to determine whether or not the gamma correction by the gamma correction circuit is normal.
Dependencies are inferred from the claim text.