Image processing apparatus and image processing method
AssigneeToshiba Tec Kabushiki Kaisha
InventorKeiko Kanamori
Life of this patent
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Abstract
An image processing apparatus of an embodiment includes an image processing unit to convert a color image to a monochrome image. The color image comprises pixels with a plurality of color components. The image processing unit is configured to generate a histogram from the monochrome image showing a color intensity gradation in the monochrome image by pixel frequency. A processor is configured to obtain a first threshold value based on the histogram, determine for each color component of each pixel in the color image whether or not each color component of the pixel is light based on the first threshold value, and generate a corrected color image by removing a background coloring from the color image by correcting each pixel for which all the color components are determined to be light.
Claims16
An image processing apparatus, comprising:
- an image processing unit configured to generate histograms showing a gradation of color intensity for each color component of a color image by pixel frequency;
- and
- a processor configured to:
- obtain a threshold value for each color component from the histogram for the color component,
- determine for each pixel whether or not each color component is light based on a comparison of each color component intensity of the pixel to the threshold value, and
- generate a corrected color image by removing a background coloring from the color image by correcting each pixel for which all the color components are determined to be light.
An image processing method, comprising:
- generating histograms showing a gradation of color intensity for each color component of a color image by pixel frequency;
- obtaining a threshold value for each color component from the histograms for the respective color component;
- determining for each pixel whether or not each color component is light based on a comparison of each color component intensity of the pixel to the threshold value;
- and
- generating a corrected color image by removing a background coloring from the color image by correcting each pixel for which all the color components are determined to be light.
Dependencies are inferred from the claim text.