程序主要对是信号波形取反，可以用来测试FPGA芯片的引脚功能是否正常。-Signal waveform inversion，can be used to test the FPGA chip pin function.

A fast connected component labeling algorithm based on FPGA is presented for high speed image processing on the condition that the images are continuous without horizontal blanking. Using run length code to optimize image labeling, the labels’num