基于DM642的光纤中心定位算法优化

Optimization of Fiber Center Locating Algorithm Based on DM642

大规模的数据存取是制约数字信号处理器系统效率的主要因素之一。在传像光纤束成像系统中,为提高出端光纤束在光纤中心定位过程中数据存取的效率,提出DM642平台下的光纤中心定位优化方法。在存储器配置方面,设置二级储存器缓存与片内随机存储器的模式,预取部分片外数据到片内随机存储器。在数据传输方面,设计数据存储动态偏移量,自适应迭代,避免重复读入。实验结果表明,优化后的算法实现了光纤中心的定位,时间开销降低了1/4,提高了系统的运行效率。

The massive data transmission is one of the major factors which restrict the efficiency of Digital Signal Processor（DSP） system. An optimization of locating the center of fiber algorithm based on DM642 is proposed to improve the efficiency of data transmission in the process of locating the center of the fiber at the end of the image-carrying fiber bundles imaging system. In memory configuration phase, this paper sets the mode of the L2 cache/SRAM and prefetching off-chip data to on-chip SRAM. In data transmission phase, designs dynamic offsets of the data storage which can adapt iteration and reduce repeated read. Experimental results show that this method can locate the center of fiber, whose time consumption is reduced by 1/4, and improve the efficiency of the system.