Abstract: A method includes: a splitting step in which a full-screen image data acquired in a full-screen image acquiring step is split into block images in a predetermined size from one end of a screen area; a positional information creating step in which block images at two sequential time instants are compared in every block image split in the splitting step to create positional information data expressing presence or absence of a difference and positional information about a block considered to have a difference; and a compressed difference image creating step in which a block determined as a block considered to have a difference in the positional information creating step is a difference block, and an image collection created by arranging block images of difference blocks at the identical time instant is compressed as one image to create a compressed difference image.

Abstract: A moving image splitting device is connected to the cameras of a camera group that captures moving images, connected to an information processor through a network, and having a processor. The processor repeats requesting the camera to send a moving image, acquiring a captured moving image from the camera, detecting an I frame from the acquired moving image, creating split data with a sequence allocated in an ascending order of captured time instants in a GOP unit including the I frame, and accumulating the split data in a storage device. In response to a request for split data from the information processor, the processor extracts split data from the storage device with reference to the sequence allocated to the split data, and transfers the extracted split data to the information processor.

Abstract: A moving image splitting device is connected to the cameras of a camera group that captures moving images, connected to an information processor through a network, and having a processor. The processor repeats requesting the camera to send a moving image, acquiring a captured moving image from the camera, detecting an I frame from the acquired moving image, creating split data with a sequence allocated in an ascending order of captured time instants in a GOP unit including the I frame, and accumulating the split data in a storage device. In response to a request for split data from the information processor, the processor extracts split data from the storage device with reference to the sequence allocated to the split data, and transfers the extracted split data to the information processor.