| 摘要 |
An image processing apparatus, an image reading apparatus, and an image forming apparatus are provided to enable a spectral reflectance estimation function with various characteristics to be determined selectively if the coefficients of predetermined instinct vectors are determined, thereby reducing the amount of data indicating a spectral reflectance. An operating method for an image forming apparatus comprises the following steps of: allowing an image reading unit to radiate a first light source on a photographed object to perform first scanning(S11); allowing a control unit to generate first image data(S12); allowing the image reading unit to radiate a second light source on the photographed object to perform second scanning(S13); allowing the control unit to generate second image data(S14); allowing the image processing unit to calculate a spectral reflectance for each pixel composing image data(S15); allowing the image processing unit to calculate incentive values in an XYZ color chart for each of pixels of the first and second image data(S16); allowing the image processing unit to calculate coefficients for obtaining a spectral reflectance estimation function(S17); allowing the image processing unit to determine the color and amount of toner(S18); allowing the control unit to supply image data to an image forming unit(S19); and allowing the image forming unit to form an image on a recording sheet using plural toners on the basis of the image data(S20).
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