System and methods for determining color characteristics of an image
AssigneeXerox Corporation
InventorAmal Z Malik
Life of this patent
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Abstract
Disclosed embodiments relate to a method implementable on a computing device for determining color characteristics of an image. The method includes identifying one or more regions in the image based on a luminance value associated with pixels in the image. Each region comprises a set of pixels having a predefined range of luminance values. The set of pixels associated with the one or more regions are categorized into one or more predefined color categories corresponding to each of the one or more regions, based on a chroma value associated with each pixel in the set of pixels. The color characteristics of the image are determined based on a count of the categorized pixels in each of the one or more predefined color categories.
Claims20
A method implementable on a computing device for determining color characteristics of an image, the method comprising:
- identifying one or more regions in the image based on a luminance value associated with pixels in the image, wherein each region comprises a set of pixels having a predefined range of luminance values;
- categorizing a pixel in the set of pixels in one or more predefined color categories based on a chroma value associated with the pixel, wherein the one or more predefined color categories are determined based on luminance values associated with the set of pixels in a region, from the one or more regions, associated with the pixel;
- determining a weighted sum of count of pixels, categorized in each of the one or more predefined color categories, for each of the one or more regions;
- and
- determining the color characteristics of the image based on a number of regions, from the one or more regions, having the weighted sum exceeding a predetermined threshold.
A method implementable on a Multi-Function Device (MFD), the method comprising:
- scanning a document to obtain an image;
- identifying one or more regions in the image based on a luminance value associated with one or more pixels in the image, wherein each region comprises a set of pixels having a predefined range of luminance values;
- categorizing the set of pixels associated with the one or more regions in one or more predefined color categories corresponding to the each of the one or more regions based on a chroma value associated with the each pixel;
- determining color characteristics of the image based on at least one of a count of the categorized pixels in each of the one or more predefined color categories, weights assigned to each of the one or more predefined color categories, a white-point offset of the MFD, a black-point offset of the MFD, or a noise value associated with the MFD, wherein the weights are computed based on at least one of the white point offset of the MFD, the black point offset of the MFD or the noise value associated with the MFD;
- and
- classifying the image at least as a color image or a neutral image based on the color characteristics.
A Multi-Function Device (MFD) for determining color characteristics of an image, the MFD comprising:
- an analysis module configured to:
- identify one or more regions in the image based on a luminance value associated with one or more pixels in the image, wherein the each of the one or more regions comprises a set of pixels having a predefined range of luminance values;
- determine a chroma value associated with each pixel in each of the one or more regions;
- and
- categorize the each pixel in one or more predefined color categories corresponding to each of the one or more regions based on the chroma value;
- and
- determine the color characteristics of the image based on a count of the categorized pixels in each of the one or more predefined color categories, weights assigned to each of the one or more predefined color categories, a white-point offset of the MFD, a black-point offset of the MFD, or a noise value associated with the MFD, wherein the weights are computed based on at least one of the white point offset of the MFD, the black point offset of the MFD or the noise value associated with the MFD.
Dependencies are inferred from the claim text.