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

An image processing method comprising:

• by an image processing device
• generating a second equidistant cylindrical image whose center pixel is equal to a center pixel of each of projection regions of plural projectors in a first equidistant cylindrical image and that includes pixels within an angle range including the each of the projection regions, as an image used to generate each of projection images that are projected from the plural projectors;
• generating a low-resolution equidistant cylindrical image by lowering resolution of the first equidistant cylindrical image;
• and
• adjusting a projection frontal position using a display of the low-resolution equidistant cylindrical image,
• wherein the generation of the second equidistant cylindrical image is based on the each of the projection regions in the first equidistant cylindrical image after adjustment of the projection frontal position.

A non-transitory computer-readable medium having embodied thereon a program, which when executed by a computer causes the computer to execute an image processing method, the method comprising:

• generating a second equidistant cylindrical image whose center pixel is equal to a center pixel of each of projection regions of plural projectors in a first equidistant cylindrical image and that includes pixels within an angle range including the each of the projection regions, as an image used to generate each of projection images that are projected from the plural projectors;
• generating a low-resolution equidistant cylindrical image by lowering resolution of the first equidistant cylindrical image;
• and
• adjusting a projection frontal position using a display of the low-resolution equidistant cylindrical image,
• wherein the generation of the second equidistant cylindrical image is based on the each of the projection regions in the first equidistant cylindrical image after adjustment of the projection frontal position.

A projection system comprising:

• a screen having a curved projection surface;
• plural projectors configured to project projection images generated by an image processing device on the screen;
• and
• the image processing device including
• a generator configured to generate a second equidistant cylindrical image whose center pixel is equal to a center pixel of each of projection regions of plural projectors in a first equidistant cylindrical image and that includes pixels within an angle range including the each of the projection regions, as an image used to generate each of the projection images that are projected from the plural projectors,
• a resolution converter configured to generate a low-resolution equidistant cylindrical image by lowering resolution of the first equidistant cylindrical image,
• a first projection frontal position adjustment section configured to adjust a projection frontal position using a display of the low-resolution equidistant cylindrical image, wherein the generator is further configured to generate the second equidistant cylindrical image, based on the each of the projection regions in the first equidistant cylindrical image after adjustment of the projection frontal position, and
• a projection controller configured to generate the projection images based on the second equidistant cylindrical image and an image generation parameter including transformation information for transforming a center pixel of the each of the projection images to the center pixel of the second equidistant cylindrical image and information indicating an angle range of the second equidistant cylindrical image, and cause the plural projectors to project the projection images, respectively,
• wherein the generator, the resolution converter, the first projection frontal position adjustment section, and the projection controller are each implemented via at least one processor.