Image processing device, projection system, image processing method, and image processing program

An image processing method in which, for displaying a projection target image by projecting a first image in a first projection range from a first projection unit and projecting a second image in a second projection range, that overlaps a part of the first projection range, from a second projection unit, first data for display of the first image and second data for display of the second image are generated from data of the projection target image,

• wherein a region of the first image, which is projected on an overlapping portion of the first projection range and the second projection range, is defined as a first superimposed region and a region of the first image other than the first superimposed region is defined as a first non-superimposed region,
• a region of the second image, which is projected on the overlapping portion, is defined as a second superimposed region and a region of the second image other than the second superimposed region is defined as a second non-superimposed region, and
• the image processing method comprises
• a brightness acquisition step of acquiring first brightness which is brightness of the overlapping portion in a state in which a specific image is projected on the overlapping portion only from the first projection unit and second brightness which is brightness of the overlapping portion in a state in which the specific image is projected on the overlapping portion only from the second projection unit, and
• an image generation step of generating data for projecting the specific image, as a first portion in the first data for display, which corresponds to the first superimposed region, generating a second portion in the first data for display, which corresponds to the first non-superimposed region based on first input image data in the data of the projection target image, which corresponds to the first non-superimposed region, and the second brightness, and generating a third portion in the second data for display, which corresponds to the second superimposed region based on second input image data in the data of the projection target image, which corresponds to the second superimposed region, and the first brightness.

A non-transitory computer readable medium storing an image processing program causing a computer to perform an image processing method in which, for displaying a projection target image by projecting a first image in a first projection range from a first projection unit and projecting a second image in a second projection range, that overlaps a part of the first projection range, from a second projection unit, the first image and the second image are generated from the projection target image,

• wherein, in the image processing method, a region of the first image, which is projected on an overlapping portion of the first projection range and the second projection range, is defined as a first superimposed region and a region of the first image other than the first superimposed region is defined as a first non-superimposed region,
• a region of the second image, which is projected on the overlapping portion, is defined as a second superimposed region and a region of the second image other than the second superimposed region is defined as a second non-superimposed region, and
• the image processing method comprises
• a brightness acquisition step of acquiring first brightness which is brightness of the overlapping portion in a state in which a specific image is projected on the overlapping portion only from the first projection unit and second brightness which is brightness of the overlapping portion in a state in which the specific image is projected on the overlapping portion only from the second projection unit, and
• an image generation step of generating a black image as the first superimposed region, generating the first non-superimposed region based on a first input image of the projection target image, which corresponds to the first non-superimposed region, and the second brightness, and generating the second superimposed region based on a second input image of the projection target image, which corresponds to the second superimposed region, and the first brightness.