Image processing device, imaging device, image processing method, imaging method, and image processing program for pseudo-color suppression in an image

An image processing method for generating a color image having a plurality of color information for each pixel from a color mosaic image from an image sensor with a matrix of units, a unit comprising one or more R (red), one or more G (green) and one or more B (blue) pixels, said method comprising,

• at the pixel position in the above mentioned color image corresponding to an above mentioned unit,
• a 1st color difference generation step for generating a first color difference wherein a sum of respective R pixel signals for said one or more R pixels in said unit and of respective B pixel signals for said one or more B pixels in said unit is subtracted from the sum of respective G pixel signals for said one or more G pixels in said unit,
• a 2nd color difference generation step for generating a second color difference wherein the difference between the sum of the one or more R pixel signals and the sum of the one or more B pixel signals is calculated,
• a pseudo-color suppression step for suppressing pseudo-color in at least one of the above mentioned 1st color difference and 2nd color difference, and
• a color space conversion step for converting said 1st color difference and 2nd color difference for which said pseudo-color suppression step using a luminance was applied into a predetermined color space and for generating the above mentioned color information.

A non-transitory computer-readable medium containing an image processing program for computer execution wherein:

• a color image having a plurality of color information for each pixel from a color mosaic image obtained from an image sensor is generated, the image sensor comprising a matrix of units, a unit comprising one or more R (red), one or more G (green) and one or more B (blue) pixels, and at the pixel position in the above mentioned color image corresponding to a unit,
• the program comprising a 1st color difference generation step for generating a first color difference, by subtracting a sum of respective R pixel signals for said one or more R pixels in said unit and of respective B pixel signals for said one or more B pixels in said unit from the sum of respective B pixel signals for said one or more B pixels in said unit and,
• a 2nd color difference generation step for generating a 2nd color difference, by calculation of the difference between the sum of the above mentioned respective R pixel signals and the sum of the above-mentioned B pixel signals and,
• a pseudo-color suppression step for suppressing pseudo-color in at least one of said 1st color difference and said 2nd color difference,
• a color space conversion step for converting the pseudo-color suppressed 1st color difference and 2nd color difference, having gone through the above-mentioned pseudo-color suppression step using a luminance, into a determined color space and for generating the above mentioned color information.