Dynamic image transmission system

DETAILED DESCRIPTION Accordingly, it is a general object of the present invention to provide a novel and useful dynamic image transmission system in which the problems described above are eliminated.
Another and more specific object of the present invention is to provide a dynamic image transmission system comprising input means for inputting image data of an input image, memory means for storing the image data successively input from the input means and for storing transmitting image data which is to be transmitted, extracting means for extracting a dynamic region which is a portion of the input image and contains a change in image data from that of a previous frame by comparing image data of two successive frames stored in the memory means, transmission means for transmitting the image data stored in the memory means to a transmission path as the transmitting image data, and control means for controlling operations of the extracting means and the transmission means during an image transmission mode so that image data related to a first frame of the input image is transmitted as the transmitting image data but only the image data within the extracted dynamic region is transmitted as the transmitting image data with respect to second and subsequent frames.
According to the dynamic image transmission system of the present invention, it is possible to considerably reduce the quantity of the image data which is to be transmitted even when the image to be transmitted is dynamic, that is, the image includes a movement.
For this reason, it is possible to transmit a dynamic image which includes a quick movement in a transmission path which has a low data transmission rate such as a telephone line.
Other objects and further features of the present invention will be apparent from the following detailed description when read in conjunction with the accompanying drawings.