Image processing apparatus and image processing program

A computer readable medium storing a computer program which causes a computer to input an image obtained by sensing an optical image by an image sensing system, compensate for an omitted color component, and output a color image, the program being executable by the computer to cause the computer to perform functions comprising:

• a weight setting function which sets a weight Wk in each direction Sk (k is an integer from 1 to n) of a plurality of directions S1, S 2, . . . , Sn (n is an integer of not less than 1) starting from a pixel of interest in a predetermined neighborhood of the pixel of interest;
• an averaging function which calculates a weighted average of pixel values Vk of pixels having a specific color component and located on each direction Sk (k is an integer from 1 to n) in the predetermined neighborhood by using the weights W1 to Wn of the pixel values V1 to Vn;
• and
• a restoration unit function which causes the averaging function to calculate weighted averages of a plurality of types of color components, and which restores a value of the omitted color component of the pixel of interest on the basis of a weighted average result and a pixel value of the pixel of interest.