1. A dynamic image representation system comprising: means for sensing a dynamic scene; and means receiving an output from said means for sensing, for providing a pixel count reduced dynamic digital representation of the scene having pixel count reductions in portions of the scene not fulfilling predetermined spatial criteria and pixel count reductions in portions of the scene not undergoing change within predetermined temporal criteria, wherein said reduced representation comprises a stream of data comprising tagged pixels which comprise x and y image coordinates of each pixel existing in a hierarchy of lower resolution images wherein the lowest resolution image is retained in its entirety and the remaining higher resolution images contain only areas of the image containing high information content and an intensity value at said pixel.