This research introduces the software and hardware design of an image processing system based on the System On Programmable Chip(SOPC) technology. This system adopts FPGA as the Video signal acquisition control module

using the internally embedded NIOS II soft-core microcontroller of FPGA as the image processing unit. Aiming at the infrared dim-small target with sky background

a novel image pre-processing algorithm is proposed based on morphological and combination of bionics. The proposed algorithm based on mathematical morphology filter used the principle of solid visual budge of human eye to enhance targets and suppress background which adopts the adaptive threshold segmentation method to detect the target. According to the results after the hardware implementation

this system is appa-rently real-time

the performance of the image processing is effective and the target detecting is accurate. The effectiveness and real-time characters of the algorithm is proved.