关键词: 图像旋转 图形处理器 实时绘制 DirectX

Abstract:

An algorithm of image rotation and real-time rendering based on GPU（graphics processing unit） is presented in this paper. Firstly, a method of rotat ion transformation which is implemented by CPU is summarized, and the limitations of this method are pointed out. And then, the algorithm of image rotat ion based on GPU is elicited, the process of image rotation and real-time displaying is implemented on the platform of VC＋＋ 6.0 by using DirectX 9.0.   Finally, the experimental results of the two methods are analysed and compared. The new algorithm absorbs the merits of GPU in the aspects of speed and saving the CPU resources, and ensures the operation speed and quality of image rotation.

Key words: image rotation, graphics processing unit, real-time rendering, DirectX