Image processing apparatus, image processing system, and image processing method

摘要

An image processing apparatus includes a first image output device and a second image output device outputting first and second output data from the original image data, a color component mapping device generating color component mapping data containing correspondences between a first or second output image data obtained by capturing the output data with an input device and the original image data, a color tone conversion parameter fixing device generating color tone conversion parameters from pixels in the first output image data and in the original image data, the pixel in the original image data when output as the second output image data having a pixel value equal to the value of the pixel in the first output image data, and a color tone conversion device using the conversion parameters.

主权项

1. An image processing apparatus for causing a first image output device to output first output data from original image data and
a second image output device to output second output data from the original image data, the image processing apparatus comprising:
a color component mapping device configured to generate first color component mapping data containing correspondences between pixel values in first output image data obtained by capturing the first output data with an input device and pixel values in the original image data, and second color component mapping data containing correspondences between pixel values in second output image data obtained by capturing the second output data with the input device and pixel values in the original image data;a color tone conversion parameter fixing device configured to utilize the first color component mapping data and the second color component mapping data to generate color tone conversion parameters from pairs of a pixel value in the first output image data and a pixel value in the original image data, the pixel value in the original image data when output as the second output image data having a pixel value equal to the pixel value in the first output image data;a color tone conversion device converting pixel values in the original image data in response to the color tone conversion parameter; anda reproducible color storing device storing the colors in the original image data that are reproducible by the first or the second image output device, whereinthe color component mapping device corrects the first color component mapping data that includes correspondences with colors that are not reproducible by the first image output device,corrects the second color component mapping data that includes correspondences with colors that are not reproducible by the second image output device,wherein the color tone conversion parameter fixing device generates the color tone conversion parameters from the pairs of pixel values reproducible by the first and the second image output device from the original image data, andwherein the color component mapping device assigns a weight a to the first color component mapping data, assigns a weight β to a function that specifies correspondence between a pixel value and another pixel value, synthesizes the color component mapping data with the function,
and when correcting the first color component mapping data, sets the weight as α≧β for ranges where colors in the original image data are reproducible by the first image output device, sets the weight as α<β for ranges where colors in the original image data are not reproducible by the first image output device,assigns another value of weight α to the second color component mapping data, assigns another value of weight β to the function, synthesizes the color component mapping data with the function,
and when correcting the second color component mapping data, sets the weight as α≧β for ranges where colors in the original image data are reproducible by the second image output device, sets the weights as α<β for ranges where colors in the original image data are not reproducible by the second image output device.