1. A method for selecting a desired video image of a viewer from a plurality of video images provided by an image source, in an image transmission system for transmitting video images from the image source to an image display device, the method comprising the steps of: sequentially obtaining feature information for identifying targets shown in each of said plurality of video images; entering a desired feature information for identifying a desired target of the viewer; and sequentially selecting the desired video image which contains the desired target of the viewer from said plurality of video images according to the feature information sequentially obtained at the sequentially obtaining step and the desired feature information entered at the entering step.