The disclosed apparatus for evaluation of characteristics of the images of objects consists of a delay unit connected to the output of a video signal discriminator, wherein the square pulses coming from the output of the discriminator of the video signal are delayed for a time necessary for effecting synchronous coincidence of the respective square pulses of the current and delayed lines of the raster of the scanning unit. The apparatus further includes a synchronous coincidence unit and a synchronous subtraction unit, each one of them being connected by its respective input to the output of the video signal discriminator both directly and through the delay unit. The output of the synchronous subtraction unit is connected to a gate connected to the output of the generator of quantizing pulses. The outputs of the synchronous coincidence unit and of the synchronous subtraction unit are connected to a perimeter computation unit directly, while the output of the synchronous subtraction unit is additionally connected to the perimeter computation unit through a gate.