Design of Real-time Target Detection System in CCD Vertical Target Coordinate Measurement

High speed dim and small target detection is an important technology in CCD vertical target coordinate measurement. Its difficulty lies in the high frame rate real-time image processing speed requirements, weak and small target capture rate and extraction accuracy is not high [1]. In order to solve these problems, FPGA is designed and applied as the core of embedded hardware platform, and high-efficiency parallel operation, background iteration and false target detection algorithm are used to realize the real-time detection of high-speed weak and small targets in CDD images with a frame rate of 4096 lines up to 50KHz. The time delay of target acquisition and output measurement results is less than 10 ms, and the real-time performance is very good. In a certain application, under the background illumination of sky, the capture rate of dim high-speed projectile (5.8 mm projectile) can reach 100%, and the measurement accuracy $\sigma$ is less than 13 mm, and the acquisition rate test of targets larger than 5.8 mm reaches a higher standard.