An image processing device includes: a color polarization acquisition unit (101) having a patterned polarizer which includes a single-plate color imaging device having a color mosaic filter and a polarizer unit having different-angle transmitting polarization directions in the same color pixel, wherein the single-plate color imaging device is arranged adjacent to the polarizer unit; a color information processing unit (102) which acquires average color luminance information by averaging luminance values of the lights which have transmitted through a plurality of polarizer units in the same color pixel; and a polarization information processing unit (103) which approximates the relationship between the luminance of the light which has transmitted through the polarizer units in the same color pixel and the angle of the transmitting polarization direction by using a sine function.
