基于Sobel算子的医学图像边缘提取算法的DSP编程设计与实现

摘要

A rapid processing algorithm which can be downloaded in CT and MRI equipments for image edge feature extraction is developed to provide accurate basis for the clinical diagnosis.Because medical image requires a large amount of data operations,and real-time processing,etc,TMS320DM6446 chip with high speed operation ability was adopted in the study,and Sobel operator algorithm was programmed based on DSP,and then was downloaded into the chip.According to the principle of Sobel algorithm,the Sobel algorithm was optimized,replacing the square root operation with size comparison operation to reduce the amount of data operations and processing time.Image experiment results showed that the processing time for each medical image was about 0.43 s,and that the obtained image edge was clear and accurate.%研制一种快速处理算法,可下载到CT、MRI设备中,对所得到的图像进行快速边缘特征提取.由于医学图像数据运算的数据量大,而且要求实时处理等特点,采用具有高速运算能力的TMS320DM6446芯片,将Sobel算子算法进行DSP编程并下载到芯片中实现,并根据Sobel算法原理,对算法进行优化处理,减少平方开方运算,代之以大小比较运算,减少了运算的数据量,减少了处理时间.实验图像结果表明,该算法处理l幅医学图像所用的时间约为0.43 s,得到的图像边缘清晰准确.