An image processing apparatus includes: an input unit configured to input image data; a detection unit configured to execute a detection process that detects a plurality of objects from the input image data; an integration unit configured to, after the detection process ends, integrate the plurality of detected objects on the basis of respective positions of the plurality of detected objects in the image data; an estimation unit configured to, before the detection process ends, estimate an integration time required for the integration unit to integrate the plurality of detected objects; and a termination unit configured to terminate the detection process by the detection unit on the basis of the estimated integration time and an elapsed time of the detection process by the detection unit.