Dsp Shimmer Video Real-time Image Processor Software System Design

As the noise of low-light-level image can be removed efficiently and low-light-level image quality can be improved by low-light-level video real-time image processor, which has quality of super speed and real time, observation distance of low-light-level video observation system becomes far. The image processor is widely used in army and civil field.Base on thorough analysis of principle and characteristic of low-light-level image, general software scheme of low-light-level video image real-time processor based on TMS320C6201B DSP is designed in this paper. As low contrast, a great deal of noise of low-light-level image and requirement of real-time of low-light-level image process, improved Sobel edge detect algorithm and several improved quick median filter algorithms are presented. Also improved precision of low-light-level image transform in frequency domain is analyzed in fixed DSP system. In addition, because of characteristic of TMS320C6201B used in the system, optimized algorithms of image process are discussed thoroughly. By using these optimized algorithms, time of running algorithm is decreased greatly. Finally, scheme of DMA data transmission, processing and simulator of interrupts are designed in this paper and are tested on EVM of TMS320C6201B.