BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an image processing device, a projection system, an image processing method, and a computer readable medium storing an image processing program.

2. Description of the Related Art

A method is known in which one image is divided to generate a plurality of division images, and a plurality of projectors project the division images, respectively, to display one image on a large screen (for example, see JP2016-024296A and JP2017-129770A).

SUMMARY OF THE INVENTION

In a case in which the plurality of division images are projected and displayed on the large screen, the adjacent division images are partially overlapped. However, it is difficult to accurately perform registration of an overlapping portion of the two division images, and image bleeding occurs in the overlapping portion by an amount of a registration error. In particular, such bleeding is remarkable in a case in which a fine subject, such as a high-frequency pattern, is included in the overlapping portion. JP2016-024296A and JP2017-129770A do not disclose a method of suppressing the bleeding of an image.

The present invention has been made in view of the above circumstances, and is to provide an image processing device for a projection system, a projection system, an image processing method, and a non-transitory computer readable medium storing an image processing program which can suppress the bleeding in the overlapping region of the images to achieve a high image quality in a case in which the plurality of images are projected to display one image.

An aspect of the present invention relates to an image processing device for a projection system that projects an image from each of a first projection unit and a second projection unit in a state in which at least parts of projection ranges are overlapped, the device comprising an image acquisition unit that acquires first image data for projecting the image from the first projection unit and second image data for projecting the image from the second projection unit, a superimposed region information acquisition unit that acquires information on a superimposed region between the projection range of the first projection unit and the projection range of the second projection unit, a first image processing unit that performs first image processing on a first portion in the first image data, which corresponds to the superimposed region, a second image processing unit that performs second image processing on a second portion in the second image data, which corresponds to the superimposed region, and an output unit that outputs the first image data after the first image processing as image data for the first projection unit, and outputs the second image data after the second image processing as image data for the second projection unit.

Another aspect of the present invention relates to a projection system comprising the image processing device, the first projection unit, and the second projection unit.

Still another aspect of the present invention relates to an image processing method in a projection system that projects an image from each of a first projection unit and a second projection unit in a state in which at least parts of projection ranges are overlapped, the method comprising an image acquisition step of acquiring first image data for projecting the image from the first projection unit and second image data for projecting the image from the second projection unit, a superimposed region information acquisition step of acquiring information on a superimposed region between the projection range of the first projection unit and the projection range of the second projection unit, a first image processing step of performing first image processing on a first portion in the first image data, which corresponds to the superimposed region, a second image processing step of performing second image processing on a second portion in the second image data, which corresponds to the superimposed region, and an output step of outputting the first image data after the first image processing as image data for the first projection unit and outputting the second image data after the second image processing as image data for the second projection unit.

Still another aspect of the present invention relates to a non-transitory computer readable medium storing an image processing program in a projection system that projects an image from each of a first projection unit and a second projection unit in a state in which at least parts of projection ranges are overlapped, the program causing a computer to execute an image acquisition step of acquiring first image data for projecting the image from the first projection unit and acquiring second image data for projecting the image from the second projection unit, a superimposed region information acquisition step of acquiring information on a superimposed region between the projection range of the first projection unit and the projection range of the second projection unit, a first image processing step of performing first image processing on a first portion in the first image data, which corresponds to the superimposed region, a second image processing step of performing second image processing on a second portion in the second image data, which corresponds to the superimposed region, and an output step of outputting the first image data after the first image processing as image data for the first projection unit and outputting the second image data after the second image processing as image data for the second projection unit.

According to the present invention, it is possible to provide an image processing device for a projection system, a projection system, an image processing method, and an image processing program which can suppress the bleeding in the overlapping region of the images to achieve a high image quality in a case in which the plurality of images are projected to display one image.

