An image processing device includes a texture direction determining unit that determines a texture direction of an image, a defective pixel detecting unit that calculates a pixel value average for each of pixel groups including a plurality of pixels, and detects a defective pixel position on the basis of difference information of the pixel value average according to an arrangement direction of the pixel groups, and a correction unit that corrects, as a correction target, a pixel value at the defective pixel position detected on the basis of the difference information in the same pixel group arrangement direction as the texture direction determined by the texture direction determining unit.