CORRELATION TRACKING DEVICE

• Main Authors: KONDOU TOMOMASA, NAKAGUCHI TOMOYUKI, ITOU TAKASHI, KASAHARA KUMIO
• Format: Patent
• Language: English
• Published: 02.09.1982
• Subjects: ADVERTISING; ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CALCULATING; COMPUTING; CONTROLLING; COUNTING; CRYPTOGRAPHY; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; DISPLAY; EDUCATION; ELECTRIC DIGITAL DATA PROCESSING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; REGULATING; SEALS; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TESTING

PURPOSE:To achieve tracking with high accuracy and high speed, by forecasting a position of a tracking point for a desired picture, limiting an operating region near the forecast position and setting the size of the operating region proportional to the amplitude of a velocity vector to be forecast. CONSTITUTION:A tracking point memory 13 stores a coordinate signal from a maximum value detecting circuit 12, and also stores a coordinate signal to a picture before one frame, tracking point velocity vectors Vi-1 and Vi-2 and difference vectors Si-1 and Si-1, and the information of storage is given to a vector calculating circuit 14. The circuit 14 calculates Vi and Si and the result is stored in a memory 13. The memory 13 transmits stored information to a tracking point forecasting circuit 15. The circuit 15 seeks the forecast point of the tracking point of a newly inputted picture and also an absolute value delta of a velocity vector G forecasting the postition of the tracking point of the (i+1)th input picture. Thus, the correlation operating region of a correlation operation region limiting circuit 10 is limited and a desired object on a screen is at standstill and tracked.