Color image processing apparatus for extracting image data having predetermined color information from among inputted image data and for correcting inputted image data in response to the extracted image data

The color image processing apparatus for processing input image data and outputting process image data, comprising:

• measuring means for measuring a number of image data which represent color belonging to a predetermined region of color space;
• means for judging if color correction is to be performed, based on whether said number measured by said measuring means is more than a predetermined quantity;
• means for determining a reference correction quantity when said judging means judges that color correction is to be performed, based on a difference of said image data from a reference chromaticity determined previously with respect to said predetermined region;
• means for correcting chromaticity of said image data using said reference correction quantity added with a weight corresponding to a color distance of said image data from said reference chromaticity;
• and
• means for outputting the corrected image data to a color image reproducing device.

A color image processing apparatus comprising:

• converting means for converting input color image data into luminance chromaticity information;
• counting means for counting a number of color image data representing color within a predetermined region in color space;
• means for recognizing, in response to a count value counted by said counting means, a coordinate point at which a largest number of color image data are distributed in said predetermined region as a representative value;
• correcting means for determining a distance between a hue represented by a representative value and a predetermined hue and for correcting chromaticity of said input image data based on said determined distance as a correction quantity;
• and
• means for outputting the corrected color image data to a color image reproducing device.

A color image processing apparatus comprising:

• converting means for converting input color image data into luminance chromaticity information;
• counting means for counting a number of color image data representing color within a predetermined region in color space;
• means for recognizing, in response to a count value counted by said counting means, a coordinate point at which a largest number of color image data are distributed in said predetermined region as a representative value;
• means for determining a distance between said representative value and predetermined reference value and for recognizing said distance as a correction quantity;
• correcting means for executing a weighting operation with a weight obtained in response to a distance between image data to be corrected and said reference value and for correcting chromaticity of said input image data, wherein said correction quantity is allowed to be changed in response to said weight;
• and
• means for outputting the corrected image data to a color image reproducing device.

A color image processing method comprising the steps of:

• generating color image data;
• measuring a number of image data which represent color belonging to a predetermined region of color space and which are generated in said generating step;
• obtaining a representative value of color of the image data within the predetermined region;
• correcting chromaticity of the color image data based on the representative value and the number measured in said measuring step;
• and
• outputting the corrected color image data to a color image reproducing device.

A color image processing method for processing input image data and outputting processed image data, comprising the steps of:

• measuring a number of image data which represent color belonging to a predetermined region of color space;
• judging if color correction is to be performed, based on whether the number measured in said measuring step is more than a predetermined quantity;
• determining a reference correction quantity when it is determined in said judging step that color correction is to be performed, based on a difference of the previously with respect to the predetermined region;
• correcting chromaticity of the image data using the reference correction quantity added with a weight corresponding to a color distance of the image data from the reference chromaticity;
• and
• outputting the corrected image data to a color image reproduction device.

A color image processing method comprising the steps of:

• converting input color image data into luminance chromaticity information;
• counting a number of color image data representing color within a predetermined region in color space;
• recognizing, in response to a count value counted in said counting step, a coordinate point at which a largest number of color image data are distributed in the predetermined region as a representative value;
• determining a distance between a hue represented by the representative value and a predetermined hue and for correcting chromaticity of the input image data based on the determined distance as a correction quantity;
• and
• outputting the corrected image data to a color image reproduction device.

A color image processing method comprising the steps of:

• converting input color image data into luminance chromaticity information;
• counting a number of color image data representing color within a predetermined region in color space;
• recognizing, in response to a count value counted in said counting step, a coordinate point at which a largest number of color image data are distributed in the predetermined region as a representative value;
• determining a distance between the representative value and a predetermined reference value and for recognizing the distance as a correction quantity;
• executing a weighting operation with a weight obtained in response to a distance between image data to be corrected and the reference value and for correcting chromaticity of the input image data, wherein the correction quantity is allowed to be changed in response to the weight;
• and
• outputting the corrected image data to a color image reproduction device.