1. An image matching method, comprising: assigning depth candidate values to a pixel in a first image; reassigning third depth candidate values to a first pixel in the first image based on first depth candidate values assigned to the first pixel and second depth candidate values assigned to a second pixel adjacent to the first pixel; determining one of the third depth candidate values to be a depth value of the first pixel; and matching the first pixel and a third pixel in a second image corresponding to the determined depth value of the first pixel.