An image processing apparatus that obtains a synthesized image of a subject viewed from an arbitrary viewpoint includes a calculator, a storage, and a synthesizer. The calculator calculates a correction value for a pixel value of a pixel that partially constitutes the picked-up images on the basis of a brightness of each of the plurality of picked-up images. The storage stores the correction value for each of the pixels. The synthesizer obtains a pixel value of a pixel in the synthesized image that corresponds to the pixel that partially constitutes the picked-up images by correcting a pixel value of the pixel that partially constitutes the picked-up images on the basis of a positional relationship of the pixel in the picked-up images, a correspondence relationship between the picked-up images and the synthesized image, and the correction value, and thereby generates the synthesized image.