Patent ID: 8896692

Claim:
An image processing apparatus, comprising: an image receiver to receive a drawing image that reflects drawings drawn onto a second drawing area of a second drawing object located at a remotely located site that is remote from a site at which a first drawing object is located; an image supplier to instruct a projection device to project the drawing image of the second drawing area onto a first drawing area of the first drawing object as a projection image, and to store the projection image in a memory; an image obtainer to obtain a currently captured image captured by an image capturing device, the currently captured image including a drawing image that reflects drawings drawn onto the first drawing area and the projection image; an image change detector to determine whether the drawing image of the first drawing area in the currently captured image changes from a previously captured image that is previously obtained by the image obtainer to generate a detection result; wherein the image change detector is configured to: extract a peripheral area from the currently captured image, the peripheral area being selected from an area that surrounds the first drawing area; compare the extracted peripheral area of the currently captured image with a previous peripheral area that is extracted from the previously captured image to generate a comparison result; and determine that the drawing image of the first drawing area changes from the previously captured image when the comparison result indicates that the extracted peripheral area is different from the previous peripheral area; a differential image generator to generate a differential image that includes the determined change between the projection image obtained from the memory and the currently captured image when the detection result indicates that the drawing image of the first drawing area changes; and an image transmit to transmit the differential image to the remotely located site for projection onto the second drawing area of the second drawing object as the drawing image of the first drawing object.