Infrared Image Enhancement Processing Research Based On FPGA

Nowadays, the infrared imaging technology is widely used in various fields. The first application is in military field, gradually infiltrated the industrial detecting, civil detecting, medical diagnosis detecting and other fields. As the restraint of infrared detector internal conditions and external facts, the imaging effect of the infrared imaging system is not very good. It needs to pre-treat for the collecting infrared image, to achieve a better visual effect. The traditional method for the infrared image processing usually adopts DSP. Its algorithm is complex, processing speed is slow, so that it can?t satisfy the requirement of quickness and real-time. With the rapid development of FPGA programmable logic devices, it provides the possibility for the fast operation and provides a basis for image processing on the hardware implementation combined with its parallel processing and pipeline processing features. So the infrared image enhancement based on FPGA becomes a hot research. The main contents are as follows.(1) Research the development situation about the infrared image and FPGA image processing and its background and application value.(2) Analysis infrared image imaging features specific, make compare with the visible light image combined with infrared image histogram features and the infrared imaging principle to study their difference and summarize infrared image features in order to make noise analysis.(3) Research some common image enhancement algorithm in airspace, such as neighborhood averaging method, median filtering method, gradient method and Laplace sharpening method. Analysis the enhanced infrared image features by MATLAB simulation and choose the appropriate infrared image enhancement algorithms.(4) Implement the median filtering algorithm and Laplace sharpening algorithm in FPGA. Optimize the median filtering algorithm to be the fast median filtering. The fast median filtering?s resource occupancy percentage is 58% of median filtering.Verify their realization by the function simulation.(5) Build the FPGA infrared image enhancement processing system, realize the infrared image enhanced processing.