CAJ | 학술논문

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.
제출료일충이용STM32F4미처리기실현JPEG정태도상압축편마적방법.근거도상압축편마적기본류정,중점토론료도상편마중DCT 변환적우화화실현,이급기우STM32F4적도상압축처리과정.실험결과표명,채용기우DCT 쾌속산법결합여현계수사표법적압축산법화STM32F4미처리기적정태도상압축계통,여전통적기우DCT 방법적계통상비,압축속도제고료4배,도상압축비례가체14∶1,이차도상적봉치신조비고우30,실현료대도상신호적실시、고효솔압축.
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 STM 32F4 microprocessor are mainly discussed .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 co‐sine 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 .