摘要
提出了一种利用STM32F4微处理器实现JPEG静态图像压缩编码的方法.根据图像压缩编码的基本流程,重点讨论了图像编码中DCT变换的优化和实现,以及基于STM32F4的图像压缩处理过程.实验结果表明,采用基于DCT快速算法结合余弦系数查表法的压缩算法和STM32F4微处理器的静态图像压缩系统,与传统的基于DCT方法的系统相比,压缩速度提高了4倍,图像压缩比例可达14∶1,而且图像的峰值信噪比高于30,实现了对图像信号的实时、高效率压缩.
A method of implementing the JPEG static image compression algorithmic on STM32F4 microprocessor is proposed in this paper. According to the basic process of image compression, optimization and implementation of DCT transform in the image coding and the process of image compression which based on STM32F4 microprocessor are mainly dis- cussed. Experimental results show that compared with the traditional system based on the basic DCT transform ,the proposed system based on STM32F4 microprocessor and fast DCT algorithm as long as the method of cosine coefficient querying has improved the speed of image compression by four times, and gets a higher compression ratio which can reach up to 14： 1. Moreover,the PSNR of the image is above 30, and real-time and high efficiency compression of image signal is also realized.
出处
《南华大学学报（自然科学版）》
2012年第3期58-63,共6页
Journal of University of South China：Science and Technology
基金
2011年湖南省自然科学基金资助项目(2011JJ6021)
