An FPGA top-hat transform module with two different structure elements

In this paper, a top-hat transformation module is implemented for infrared small target detection. The top-hat algorithm uses two different structure elements in erosion and dilation. Erosion implements a 5×5 ring structure element process unit while dilation implements a 3×3 structure element one. The time delay of open operation is formulated and used for background subtraction. The experiment shows that the designed module meets the real-time application requirement and has good performance in suppressing interference.