IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND RECORDING MEDIUM STORING IMAGE PROCESSING PROGRAM

摘要

An image processing apparatus, an image processing method, and an image processing program stored in a recording medium are provided. The image processing apparatus includes a processing circuitry, and the processing circuitry and the image processing method obtain a color image output from an image forming unit, predict an output color of the image forming unit to generate a predicted color specification value independent from the image forming unit, extract from the input image data a colorimetry area for color difference determination, obtain a colorimetric value of an area of the color image that corresponds to the extracted colorimetry area, using a colorimeter, and add a colorimetric error at the colorimeter due to a color arrangement on the input image data to the predicted color specification value, to obtain a corrected colorimetric value of the area of the color image.

主权项

1. An image processing apparatus comprising:
a processing circuitry that
obtains a color image output from an image forming unit, the color image being formed by superimposing two or more basic colors on top of one another based on input image data,corrects gradation characteristics of the two or more basic colors to be used by the image forming unit based on a gradation correction parameter,predicts an output color of the image forming unit to generate a predicted color specification value independent from the image forming unit,extracts from the input image data a colorimetry area for color difference determination,obtains a colorimetric value of an area of the color image that corresponds to the extracted colorimetry area, using a colorimeter, andadds a colorimetric error at the colorimeter due to a color arrangement on the input image data to the predicted color specification value, to obtain a corrected colorimetric value of the area of the color image, wherein the processing circuitry corrects the gradation correction parameter to minimize, according to a prescribed function, a difference for at least a portion of the colorimetry area between the corrected colorimetric value and a color specification value obtained using the colorimeter.