An image processing method for reconstructing an image of an arbitrary view point from plural photographed images, for the purpose of reducing a memory capacity for storing photographed images in an image generating apparatus capable of generating an image of an arbitrary view point, the method including a setting step of setting a view point position, an input step of inputting photographed images, and an extraction step of extracting light beam data necessary for reconstructing an image at the set view point position from the photographed images, wherein the input step and the extraction step are repeated until the reconstructed image is generated.