Projection control apparatus, image projection apparatus, and projection control method

An image projection apparatus comprising:

• a light modulation element configured to modulate light from a light source, and to project light modulated by the light modulation element to display an image;
• a projection control apparatus configured to control a first image projection apparatus that projects a first image and a second image projection apparatus that projects a second image so that the first image and the second image are superimposed on each other in a predetermined area,
• wherein the projection control apparatus includes:
• a corrector configured to correct an imaging characteristic for converting a received light amount into captured image data in an imaging apparatus that captured the first and second images, using a pixel value of the predetermined area in the captured image data obtained from the imaging apparatus;
• and
• a controller configured to control at least one of the first or second image projection apparatus using the corrected imaging characteristic,
• wherein the corrector:
• acquires a first representative pixel value that is the pixel value of the predetermined area from first captured image data obtained from the imaging apparatus that has captured the first image projected alone;
• acquires a second representative pixel value that is the pixel value of the predetermined area from second captured image data obtained from the imaging apparatus that has captured the second image projected alone;
• acquires a third representative pixel value that is the pixel value of the predetermined area from third captured image data obtained from the imaging apparatus that has captured the first and second images superimposed on each other in the predetermined area;
• and
• corrects the imaging characteristic using the first, second, and third representative pixel values.

A projection control method configured to control a first image projection apparatus that projects a first image and a second image projection apparatus that projects a second image so that the first image and the second image are superimposed on each other in a predetermined area, the projection control method comprising the steps of:

• correcting an imaging characteristic for converting a received light amount into captured image data in an imaging apparatus that captured the first and second images, using a pixel value of the predetermined area in the captured image data obtained from the imaging apparatus;
• and
• controlling at least one of the first or second image projection apparatus using the corrected imaging characteristic,
• wherein the correcting step:
• acquires a first representative pixel value that is the pixel value of the predetermined area from first captured image data obtained from the imaging apparatus that has captured the first image projected alone;
• acquires a second representative pixel value that is the pixel value of the predetermined area from second captured image data obtained from the imaging apparatus that has captured the second image projected alone;
• acquires a third representative pixel value that is the pixel value of the predetermined area from third captured image data obtained from the imaging apparatus that has captured the first and second images superimposed on each other in the predetermined area;
• and
• corrects the imaging characteristic using the first, second, and third representative pixel values.

A non-transitory computer-readable storage medium storing a computer program executable by a computer in an imaging apparatus to execute a projection control method configured to control a first image projection apparatus that projects a first image and a second image projection apparatus that projects a second image so that the first image and the second image are superposed on each other in a predetermined area, wherein the projection control method includes comprising the steps of:

• correcting an imaging characteristic for converting a received light amount into captured image data in the imaging apparatus that captured the first and second images, using a pixel value of the predetermined area in the captured image data obtained from the imaging apparatus;
• and
• controlling at least one of the first or second image projection apparatus using the corrected imaging characteristic,
• wherein the correcting step:
• acquires a first representative pixel value that is the pixel value of the predetermined area from first captured image data obtained from the imaging apparatus that has captured the first image projected alone;
• acquires a second representative pixel value that is the pixel value of the predetermined area from second captured image data obtained from the imaging apparatus that has captured the second image projected alone;
• acquires a third representative pixel value that is the pixel value of the predetermined area from third captured image data obtained from the imaging apparatus that has captured the first and second images superimposed on each other in the predetermined area;
• and
• corrects the imaging characteristic using the first, second, and third representative pixel values.