An image-based determination apparatus includes circuitry configured to receive at least one of first image data, output from image capture apparatuses, and second image data, output from another device, the first image data and the second image data to be subjected to an image-based determination operation; play and display the at least one of the received first image data and the second image data, on a display; designate a detection area, to be subjected to the image-based determination operation, in a first display area being displayed on the display, the first display area displaying the at least one of the first image data and the second image data; and perform the image-based determination operation on an image at the detection area in a second display area being displayed on the display, the second display area displaying the at least one of the first image data and the second image data.