1. A multi-focus camera apparatus that photographs the same region by a plurality of cameras having different focal lengths, the camera apparatus comprising: detection means for detecting a specified target in a plurality of images photographed by the cameras; region acquisition means for obtaining, in the respective images, regions comprising pixels having substantially the same relationships between blurriness degrees as relationships between blurriness degrees regarding the specified target in the respective images detected by the detection means; and image processing means for carrying out image processing to cause the regions obtained by the region acquisition means to be displayed differently from other regions.