1. An image processing method for estimating an output image from a plurality of input images, the method comprising: detecting a positional relationship among the plurality of input images captured by an image capture unit, each pixel of the input image having n pixel values corresponding to a red signal, a blue signal, and a green signal; estimating the output image by identifying observed pixel components, from the plurality of input images, for each pixel position of the output image; and producing the output image based on the identified observed pixel components from the plurality of input images, the output image having (n+1) or more pixel values corresponding to color signals for each pixel of the output image.