基于DCT的遥感图像压缩算法应用

基于DCT的遥感图像压缩算法应用

张婧;徐国根

【期刊名称】《航空电子技术》

【年(卷),期】2015(000)001

【摘要】With the development of remote sensing technology and the requirements from the customer,the large size of high resolution remote sensing image has brought great pressure on real time transform and storage system. DCT transform is one important technology for remote sensing image compression. Due to the special characteristics such as small targets, and high-resolution, an improved JPEG quantization method is proposed. This paper expounds the 2D-DCT algorithm, completes the whole design of image compressing system based on Visual C++platform. And the experiment shows that the proposed algorithm is efficient.%随着遥感技术的快速发展和用户需求的不断提高，遥感卫星获取的海量高分辨率图像数据给卫星的实时数据传输系统和星载数据存储设备都带来了巨大压力。目前，基于离散余弦变换（DCT）的变换编码方法成为卫星遥感图像数据压缩的主要算法之一，获得了大量实际应用。本文针对遥感图像目标小、细节信息丰富等特点改进JPEG算法的量化方式，并利用Visual C++平台实现了基于DCT的遥感图像数据压缩和解压缩算法，实验结果证明了DCT变换在遥感图像数据压缩中的有效性和局限性。最后，对近年来DCT的研究方向作出建议。

【总页数】4页(25-28)