Research On Infrared Imaging And Digital Transmission Technology Based On PICO384

Uncooled infrared imaging system has been widely used in military and civil field due to its advantages of small bulk, low power consumption, high reliability and low price, and with the constant improvement of the performance of uncooled focal plane array, it has been playing an increasingly large proportion in the precision guidance application of infrared imaging guidance. This paper develops the electronic components of the uncooled infrared imaging system based on PICO384 IRFPA and realizes high-speed digital transmission of infrared video with LVDS technology, so as to pave the way for the subsequent application of infrared imaging guidance.In this paper, based on PICO384 IRFPA, the development of the infrared imaging system’s electronic components mainly includes the hardware design and software development of the infrared signal processing system which uses FPGA as a main processor. The paper introduces the composition of each function circuit module and related schematic design of the hardware system in detail, including power system, A/D sampling circuit, video signal processing circuit and D/A conversion circuit, etc. System software development is mainly about the implementation of detector driven, real-time infrared video image processing and PAL video compositing. The paper describes the composition and function of each module of the software system, and gives the specific design and simulation verification of the I2C core configuration module for detector driven. As for infrared video image processing, a variety of FPGA-based real-time processing algorithms are achieved, including non-uniformity correction, blind pixel detection and compensation, median filtering, adaptive piecewise linear transformation enhancement and a new method proposed in this paper of infrared image enhancement based on the combination of gray scale translation and linear stretch.The new method has better environmental adaptability and imaging stability compared to the traditional adaptive piecewise linear transformation enhancement method when put the system in practical use. After a real-time infrared video image preprocessing and getting clear infrared video, the hardware circuits of the low-voltage differential chipset DS92LV1023E and DS92LV1224 are designed, and specific FPGA driver developments for the application of the chipset are completed simultaneously. As a result, the LVDS high-speed serial transmission of infrared video data is achieved.