PURPOSE: To obtain a variation of the dynamic body shape as well as the motion locus, and obtain a new picture effect, by detecting the overlapping of dynamic body as soon as the dynamic body is detected by frame correlation, replacing the overlapping area with an inverted picture, and making it remain in the memory means.

CONSTITUTION: A picture signal from the signal input terminal 1 is digitized by the encoder 2, and it is provided to the 1 frame picture memory 4 from the feedback processing part 3. The feedback processing part 3 executes an exclusive feedback, and also executes the on and off control, and the picture polarity control by the feedback control part 8 in accordance with the instruction from the external control terminal 9. A dynamic body picture is made to remain continuously by repeating said operation at every field. In this way, it is possible to generate an effect which has positively utilized various loci.