Image displaying system, controlling method of image displaying system, and storage medium

A controlling apparatus comprising:

• a memory storing instructions;
• and
• at least one processor configured to implement the instructions stored in the memory and execute:
• a specifying task that specifies an overlap region on a screen where a first projection region on which an image is projected by a first projector and a second projection region on which an image is projected by a second projector overlap each other;
• a measuring task that measures, based on a photographed image of the specified overlap region on the screen photographed in a situation where the first projector is projecting a predetermined image that is not uniform in brightness and the second projector is projecting no image or only a uniform image that is uniform in brightness onto the overlap region, brightness of each of measuring positions in the specified overlap region in the situation, wherein the predetermined image projected by the first projector has been corrected by first luminance correction for reducing brightness of an image to be projected from the first projector at different degrees for different positions in the specified overlap region;
• a setting task that sets, based on the brightness measured by the measuring task in the situation where the first projector is projecting the predetermined image that is not uniform in brightness and the second projector is projecting no image or only the uniform image that is uniform in brightness onto the overlap region, a parameter used for second luminance correction for reducing brightness of an image to be projected from the second projector at different degrees for different positions in the specified overlap region, to lessen a degree of the second luminance correction for a specific position, from among the measuring positions, in a first case where the measured brightness of the specific position is a first value, to less than the degree of the second luminance correction for the specific position, in a second case where the measured brightness of the specific position is a second value that is greater than the first value;
• a projecting task that causes the second projector to project a second image onto the screen together with the first projector projecting a first image onto the screen, wherein the first image is an image corrected by the first luminance correction and the second image is an image corrected by the second luminance correction according to the parameter set in the setting task;
• and
• a first determining task that determines, based on another photographed image of the specified overlap region photographed in another situation where the second projector is projecting another predetermined image that is not uniform in brightness and the first projector is projecting no image or only a uniform image that is uniform in brightness onto the overlap region, a display characteristic of the second projector,
• wherein the setting task sets the parameter used by the second projector to perform the second luminance correction according to both the brightness measured by the measuring task and the display characteristic determined by the first determining task.

A controlling method comprising:

• a specifying step of specifying an overlap region on a screen where a first projection region on which an image is projected by a first projector and a second projection region on which an image projected by a second projector overlap each other;
• a measuring step of measuring, based on a photographed image of the specified overlap region on the screen photographed in a situation where the first projector is projecting a predetermined image that is not uniform in brightness and the second projector is projecting no image or only a uniform image that is uniform in brightness onto the overlap region, brightness of each of measuring positions in the specified overlap region in the situation, wherein the predetermined image projected by the first projector has been corrected by first luminance correction for reducing brightness of an image to be projected from the first projector at different degrees for different positions in the specified overlap region;
• a setting step of setting, based on the brightness measured by the measuring step in the situation where the first projector is projecting the predetermined image that is not uniform in brightness and the second projector is projecting no image or the uniform image that is uniform in brightness onto the overlap region, a parameter used for second luminance correction for reducing brightness of an image to be projected from the second projector at different degrees for different positions in the specified overlap region, to lessen a degree of the second luminance correction for a specific position, from among the measuring positions, in a first case where the measured brightness of the specific position is a first value, to less than the degree of the second luminance correction for the specific position, in a second case where the measured brightness of the specific position is a second value that is greater than the first value;
• a projecting step of causing the second projector to project a second image onto the screen together with the first projector projecting a first image onto the screen, wherein the first image is an image corrected by the first luminance correction and the second image is an image corrected by the second luminance correction according to the parameter set in the setting step;
• and
• a determining step of determining, based on another photographed image of the specified overlap region photographed in another situation where the second projector is projecting another predetermined image that is not uniform in brightness and the first projector is projecting no image or only a uniform image that is uniform in brightness onto the overlap region, a display characteristic of the second projector,
• wherein the setting step sets the parameter used by the second projector to perform the second luminance correction according to both the brightness measured by the measuring step and the display characteristic determined in the determining step.

A non-transitory computer-readable medium storing a program executable by a computer to execute a controlling method comprising:

• a specifying step of specifying an overlap region on a screen where a first projection region on which an image is projected by a first projector and a second projection region on which an image is projected by a second projector overlap each other;
• a measuring step of measuring, based on a photographed image of the specified overlap region on the screen photographed in a situation where the first projector is projecting a predetermined image that is not uniform in brightness and the second projector is projecting no image or a uniform image that is uniform in brightness onto the overlap region, brightness of each of measuring positions in the specified overlap region in the situation, wherein the predetermined image projected by the first projector has been corrected by first luminance correction for reducing brightness of an image to be projected from the first projector at different degrees for different positions in the specified overlap region;
• a setting step of setting, based on the brightness measured by the measuring step in the situation where the first projector is projecting the predetermined image that is not uniform in brightness and the second projector is projecting no image or only the uniform image that is uniform in brightness on the overlap region, a parameter used for second luminance correction for reducing brightness of an image to be projected from the second projector at different degrees for different position in the specified overlap region, to lessen a degree of the second luminance correction for a specific position, from among the measuring positions, in a first case where the measured brightness of the specific position is a first value, to less than the degree of the second luminance correction for the specific position, in a second case where the measured brightness of the specific position is a second value that is greater than the first value;
• a projecting step of causing the second projector to project a second image onto the screen together with the first projector projecting a first image onto the screen, wherein the first image is an image corrected by the first luminance correction and the second image is an image corrected by the second luminance correction according to the parameter set in the setting step;
• and
• a determining step of determining, based on another photographed image of the specified overlap region photographed in another situation where the second projector is projecting another predetermined image that is not uniform in brightness and the first projector is projecting no image or only a uniform image that is uniform in brightness onto the overlap region, a display characteristic of the second projector,
• wherein the setting step sets the parameter used by the second projector to perform the second luminance correction according to both the brightness measured by the measuring step and the display characteristic determined in the determining step.