Image processing apparatus and method

An image processing method, comprising:

• evaluating a similarity between a captured image and a simulation image, wherein
• the captured image is captured by an imaging operation of a projected image,
• the captured image is captured by a camera,
• the projected image is projected by a projector, and
• the simulation image is obtained by simulation of an image obtained by the imaging operation of the projected image;
• obtaining corresponding points in the captured image and the simulation image;
• evaluating a distance between the corresponding points in the captured image and the simulation image;
• setting a posture of at least one of the projector or the camera as an estimation result, based on an evaluation result of the evaluated similarity and an evaluation result of the evaluated distance between the corresponding points;
• and
• setting geometric correction of the projected image, based on the set posture.

An image processing apparatus, comprising:

• circuitry configured to:
• evaluate a similarity between a captured image and a simulation image, wherein
• the captured image is captured by an imaging operation of a projected image,
• the captured image is captured by a camera,
• the projected image is projected by a projector, and
• the simulation image is obtained by simulation of an image obtained by the imaging operation of the projected image;
• repeat the evaluation of the similarity a plurality of times based on one of a resolution of the captured image or a range of a partial image, wherein
• the partial image, in the captured image, comprises an image of an object, and
• the resolution of the captured image and the range of the partial image are variable at each time of the plurality of times;
• and
• set a posture of at least one of the projector or the camera as an estimation result, based on an evaluation result of the repeated evaluation of the similarity.