METHOD FOR ANALYZING HIGH SPEED PHENOMENON AND HIGH SPEED PHENOMENON PHOTOGRAPHING DEVICE

摘要

PURPOSE:To eliminate necessity to prepare in advance a background in which a measured object is not photographed for separating the measured object from the background by obtaining a background picture by ANDing plural pictures in which the measured object and the background are recorded. CONSTITUTION:A moment when a bullet is discharged from a pistol for instance is photographed by a high speed video camera 1 for one second with 1/2000 second per frame. Reproduced pictures are A/D-converted by an A/D converter 3 by every one piece and are inputted to a picture memory 4. Next, for extracting only the bullet which is an object from a photographing image, plural pieces are selected arbitrarily from the pictures of analyzing objects and the AND of them are taken. As a result, since only a non-movable part remains, it is made as a background image, the data of the background image are inverted and the OR of the inverse image and the one frame of the photographing image is taken. Consequently, the picture of only the bullet can be obtained. A host computer 5 controls the above mentioned control.