Image determination apparatus and image determination method

An image determination apparatus, comprising:

• image data receiving means for receiving image data comprising pixels formed from RGB which are three primary colors of light,
• color conversion means for converting RGB color space of the received image to a uniform perceived color space that comprises brightness values in proportion to luminous intensity and standardized perceived color values in proportion to human coloring,
• accumulation means for accumulating the perceived color values of the image data converted by said color conversion means in each small-region comprised by specified pixels, and
• color region determination means for determining whether said small regions are color or monochrome based on the accumulated value.

An image determination method, comprising the steps of:

• a receiving process for receiving image data accepting image data that receives image data comprising picture pixels formed of RGB which are three primary colors of light,
• a first comparison process for comparing a first color saturation value determined from color components of each pixel of said received image data to a first threshold value,
• reversed image calculation process for calculating the color components of reversed images acquired by subtracting said color components from a possible maximum value of the color components of each of said pixels,
• second comparing means for comparing a second color saturation value determined from color components of the reversed image to a second threshold value, and
• color region determination means for determining whether there is color or monochrome based on a result of comparison between said first comparing means and said second comparing means.

An image determination method, comprising the steps of:

• an image data receiving process for receiving image data comprising pixels formed of RGB which are three primary colors of light;
• a color conversion process for converting RGB color space of the received image data to a uniform perceived color space that comprises brightness values in proportion to luminous intensity and standardized perceived color values in proportion to human coloring,
• an accumulation process for accumulating perceived color values of image data converted by said color conversion process in each small region comprised of specified pixels, and
• a color region determination process for determining whether the small regions are color or monochrome based on accumulated result of said accumulation process.