TARGET IMAGE TRACKING DEVICE

• Main Authors: YAMAGUCHI MAKIO, KUBO HIDEHIKO
• Format: Patent
• Language: English
• Published: 31.01.1989
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PURPOSE:To obtain a silhouette image of a distinct target, and to track the target with high accuracy by binarizing an input image, obtaining a target area image, and also, detecting an edge of the input image. CONSTITUTION:A binary threshold level setting circuit 2 measures a luminance statistic of the periphery of a target from an input image A, sets a threshold level SL1 by which a noise in the periphery of the target is not extracted easily and only the target is extracted easily, and gives it to a binarizing circuit 3. The circuit 3 executes binarization of the image A by the threshold level SL1, and obtains an area image B. An edge detecting circuit 4 executes an arithmetic operation with regard to the image A and obtains an edge image C. An edge binary threshold level setting circuit 5 measures a luminance statistic of the periphery of the target from the obtained image C, and sets a threshold level SL2 by which a noise of the periphery of the target is not extracted easily, and only an edge of the target is extracted easily. An edge image binarizing circuit 6 executes binarization of the image C by the threshold level SL2, and obtains a contour image D. The image D and B are sent to an image synthesizing circuit 7 and synthesizing by an OR circuit, two images are superposed and a silhouette image E of the target is obtained.