Canon Kabushiki Kaisha

Michihisa Yanagi

Hidetoshi Wada

Azusa Koike

Ryosuke Naito

A projection control apparatus is 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 apparatus includes a corrector configured to correct an imaging characteristic for converting a received light amount into captured image data in an imaging apparatus configured to capture the first and second images, by 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 and second image projection apparatuses using a corrected imaging characteristic.

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

Each projection apparatus in a multi-projection system has a liquid crystal panel, a driving circuit configured to perform PWM control of the liquid crystal panel, and a projection image processing unit configured to perform edge blending processing to perform compositing display by each projection apparatus and processing to change gain properties of the edge blending processing by each projection apparatus. Synchronization of each projection apparatus is maintained by a synchronization circuit. Therefore, a sum of image gain in a region of image compositing by each projection apparatus is 1, and the position and image gain properties of the compositing region are changed for each frame, so the position of image deterioration changes for each frame.

Projection apparatus, method of controlling projection apparatus, and projection system

The apparatus calculates a first relation representing a relation of mapping from an image capturing coordinate system of a camera to a shading correction coordinate system of a display apparatus, by using a first captured image acquired by capturing a first display image, and calculates a second relation by removing, from the first relation, a part corresponding to an object located between the first display image and the camera. The apparatus calculates a first gradation value in the shading correction coordinate system by performing a mapping transformation using the second relation on a second captured image acquired by capturing a second display image, calculates from the first gradation value a first correction value for the shading correction coordinate system, and calculates through an interpolation using the first correction value a second correction value for a part thereof where the first gradation value is not calculated.

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Utsunomiya, Japan

Michihisa Yanagi