1. An apparatus for identifying each pixel, in lines of bicolored pixels of a raster scanned video image of a scene containing at least one object, to the object of which the pixel corresponds, comprising: means for grouping adjacent bicolored pixels of the same color across a line into corresponding numbered pixel groups, means for downwardly grouping pixel groups of the same color into numbered blobs of pixel groups, when a next line pixel group occurs which is of the same color with more than one previous line pixel group the next line pixel group is grouped as part of the first occurring previous line blob, means for upwardly grouping additional pixel group matches occurring between pixel groups of previous and a next line to provide a common ancestor blob number to each blob of the pixel group in each additional pixel group match; and means for grouping blobs having common ancestor blob numbers into numbered objects, each blob belonging to an object so that each pixel, through a blob number, corresponds to an object number.