1. An image processing apparatus that sequentially outputs image signals in accordance with each of at least two types of images, the image processing apparatus comprising: a memory that stores the image data of the inputted at least two types of images, a first image and a second image included in the at least two types of images being in a relationship of forming image data of an image not correlated with the first image when luminance values of image data respectively are added pixel by pixel; a unit that creates image data of a plurality of first dispersed images based on the image data of the first image in which grayscale of pixel corresponding to the plurality of first dispersed images is luminance value of the first image when luminance values are added pixel by pixel and grayscales different from grayscale values of the first image are allocated to grayscale values respectively; and a shutter controlling unit that outputs a shutter control signal for setting a light shutter to a light transmission state only in a time for outputting image signals in accordance with the image data of the first dispersed images.