Image display device for reducing processing load of image display

An image display device comprising:

• a communication unit configured to receive frame images sequentially transmitted from each of a plurality of image pickup devices;
• a display unit configured to display the frame images from each of the plurality of image pickup devices that have been received by the communication unit;
• a storage unit configured to store processible information on an amount of the frame images that can be processed within a predetermined period of time, and store priority information indicating priorities of the frame images previously determined with respect to a photographing operation, a photographing environment, or a state of a photographed subject related to the frame images that have been received by the communication unit;
• an acquisition unit configured to acquire status information indication the photographing operation, the photographing environment, or the state of the photographed subject for each of the image pickup devices;
• a determiner configured to determine a frame rate information of images transmitted by each of the image pickup devices within a predetermined period of time based on the processible information and the priority information stored in the storage unit and the status information acquired by the acquisition unit;
• and
• a controller configured to perform control that causes a frame rate information of images determined by the determiner to be transmitted from the communication unit to each of the plurality of image pickup devices,
• wherein the frame rate information of images to be displayed is determined based on both information from the image pickup device and information from the display unit.