Abstract: An image processing apparatus includes a memory storing instructions, and a processor configured to execute the instructions to acquire information about an optical system included in an image pickup apparatus configured to capture an image, acquire a change amount in the information about the optical system in a peripheral area of a target pixel in the image based on the information about the optical system, and acquire, based on the change amount, information about recognition accuracy in the peripheral area by a recognition apparatus configured to perform image recognition.

Abstract: An image processing device that generates reliability of matching between a first image and a second image includes a pixel value change generation unit configured to set a standard image including a pixel of interest in the first image or the second image to generate at least a first pixel value change in a first direction and a second pixel value change in a second direction for each local region of the standard image, a gradient direction generation unit configured to generate a gradient direction of the local region based on the first pixel value change and the second pixel value change, a gradient direction correction unit configured to correct the gradient direction in accordance with the gradient direction, and a reliability generation unit configured to generate the reliability based on the gradient direction corrected by the gradient direction correction unit.

Abstract: An apparatus for calculating a parallax based on a first image and a second image calculates a cross-correlation value between a first criterion image set on the first image and a first reference image set on the second image, calculates an auto-correlation value between a second criterion image and a second reference image set on either one of the first image and the second image, calculates a parallax amount between the first image and the second image by using the cross-correlation value and the auto-correlation value, and corrects the cross-correlation value by using the auto-correlation value.