数字影像压缩技术的设计与实现

Design and Realization of Technique of Digital Image Compression

数字影像压缩一直是计算机图像图形领域的研究热点和攻关难点,针对影像压缩的具体要求,通过JPEG影像压缩算法和理论,实现了BMP影像文件从1到100范围内动态压缩成JPG影像文件.同时,对获取的JPG影像文件又可以还原解码成BMP影像文件.在设计与实现压缩的分析过程中,还对压缩后的影像质量作了比较,当压缩比例为50时,压缩影像质量良好,肉眼很难感知目标影像和压缩影像的差异.

Digital image compression is the researching hot-spot and difficult-spot in the field of computer image and graphics. Towards the concrete demands of image compression, via the JPEG image compression algorithm and theory, realizes the image compression from BMP form to JPG form in the range of 1 to 100. Meanwhile, realizes the reverse reduction from JPG form to BMP form. In the process of design and realization of compression, the image quality before and after compression is compared. The results show that when the compression proportion reaches 50 percentage, the quality of compression image is excellent, and the naked eyes are very difficult to discern the target image and compression image.