一种DSP折反射全景图像实时展开方法

为了提高折反射全景图像展开速度，可采用查表来取代耗时的计算，但查找表需要大量的存储空间，于是采用分块预取方法。通过分块，将待处理目标图像块对应的查找表和原始图像分块预先存入DSP片内存储器并完成展开，可以降低存取访问开销，加快查表展开。实验结果表明，分块预取方法在对1024×768分辨率的原始全景图像展开为1152×256分辨率的目标全景图像时，展开数据可达每秒97帧，与不采用分块预取策略的查表展开方法相比，此方法要快近20倍。

Real-time unrolling catadioptric omni-directional images on DSP

Lookup-table method is usually used to improve the speed of panorama unrolling to avoid time-consuming calculation,but it strongly requires space for storage.Therefore,a method called block prefetch was put forward.In order to lower the accessing cost and fastern the lookup-table unrolling,a target image can be divided with its corresponding lookup-table and source image into blocks,and then it can be unrolled in DSP's on-chip memory by the prefetched blocks.Experiments indicate that the method makes the un...