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给出了一个基于JPEG2000算法的红外图像压缩解压缩系统的设计方案。该系统使用专用的硬件压缩芯片ADV202以及ADV7179、ADV7189和FPGA内嵌的NiosII软核处理器,解决了直接采用FPGA+DSP设计复杂、开发周期长的缺点。NiosII软核处理器通过IIC总线对ADV202、ADV7189的控制实现图像数据的A/D转换和图像压缩,对ADV202、ADV7179的控制实现图像的解压缩和D/A转换。与此同时采用抽场补场的方式实现图像压缩和传输速率的要求,并且通过改变抽场参数可以实现传输速率的改变。实验表明文中的设计方案达到了系统要求的各项技术指标。
A design scheme of infrared image compression and decompression system based on JPEG2000 algorithm is given. The system uses a dedicated hardware compression chip ADV202 and ADV7179, ADV7189 and FPGA embedded NiosII soft-core processor, to solve the direct use of FPGA + DSP design complex, long development cycle shortcomings. NiosII soft-core processor through the IIC bus ADV202, ADV7189 control of image data to achieve A / D conversion and image compression, ADV202, ADV7179 control the image decompression and D / A conversion. In the meantime, the method of pumping out the field to achieve the image compression and transmission rate requirements, and by changing the pumping parameters can be achieved to change the transmission rate. Experiments show that the design of the article has reached the technical requirements of the system.