An information processing device, comprising: an input unit to which a compressed image data item of an image to be a projection target is input, wherein the image comprises a plurality of display regions; a setting unit that sets one of the plurality of display regions as a superimposition region at a predetermined position, set on a basis of a position information item input in advance by a user, in the image to be the projection target; and a generation unit that generates, on a basis of the input compressed image data item, a base image that contains an image of the superimposition region, and a superimposition image that is superimposed onto the image of the superimposition region in the base image; wherein the generation unit is configured to generate the base image and the superimposition image by, for each pixel in the image to be the projection target: determining whether said pixel is contained within the superimposition region; when said pixel is determined to be contained within the superimposition region, the generation unit is configured to execute a highlighting process on the pixel; wherein the highlighting process is a process of calculating a display luminance in a high dynamic range of each of the pixels to be contained in the superimposition region; and when said pixel is determined to be outside the superimposition region, the generation unit is configured to execute a standard representation process on the pixel; wherein the standard representation process is a process of calculating a display luminance in a standard dynamic range of each of the pixels outside the superimposition region. an input unit to which a compressed image data item of an image to be a projection target is input, wherein the image comprises a plurality of display regions; a setting unit that sets one of the plurality of display regions as a superimposition region at a predetermined position, set on a basis of a position information item input in advance by a user, in the image to be the projection target; and a generation unit that generates, on a basis of the input compressed image data item, a base image that contains an image of the superimposition region, and a superimposition image that is superimposed onto the image of the superimposition region in the base image; a base image that contains an image of the superimposition region, and a superimposition image that is superimposed onto the image of the superimposition region in the base image; wherein the generation unit is configured to generate the base image and the superimposition image by, for each pixel in the image to be the projection target: determining whether said pixel is contained within the superimposition region; when said pixel is determined to be contained within the superimposition region, the generation unit is configured to execute a highlighting process on the pixel; wherein the highlighting process is a process of calculating a display luminance in a high dynamic range of each of the pixels to be contained in the superimposition region; and when said pixel is determined to be outside the superimposition region, the generation unit is configured to execute a standard representation process on the pixel; wherein the standard representation process is a process of calculating a display luminance in a standard dynamic range of each of the pixels outside the superimposition region. determining whether said pixel is contained within the superimposition region; when said pixel is determined to be contained within the superimposition region, the generation unit is configured to execute a highlighting process on the pixel; wherein the highlighting process is a process of calculating a display luminance in a high dynamic range of each of the pixels to be contained in the superimposition region; and when said pixel is determined to be outside the superimposition region, the generation unit is configured to execute a standard representation process on the pixel; wherein the standard representation process is a process of calculating a display luminance in a standard dynamic range of each of the pixels outside the superimposition region.