Image processing apparatus, imaging apparatus, method of correction coefficient calculation, and storage medium storing image processing program

An image processing apparatus, comprising:

• a location information storing section storing location information of an imaging pixel having a trouble in a color filter among a plurality of imaging pixels of an image sensor in which the imaging pixels are two-dimensionally arranged and have color filters in a plurality of colors;
• a correction coefficient storing section storing a correction coefficient which corrects a pixel value of the imaging pixel having the trouble;
• a correction object pixel location setting section setting a location of a correction object pixel by using the location information;
• a correction object pixel data extracting section extracting a pixel value of the correction object pixel;
• an other-color pixel data extracting section extracting an other-color pixel value whose color is different from the color of the color filter at the location of the correction object pixel, by using a pixel value of an imaging pixel which exists in a vicinity of the correction object pixel and has a color filter whose color is different from the color of the color filter of the correction object pixel;
• and
• a pixel data correcting section correcting the pixel value of the correction object pixel by calculating a weighted sum of the pixel value of the correction object pixel and the other-color pixel value by using the correction coefficient.