立体影像调度的实时核线重采样方法研究

Method of Realtime Epipolar Resampling Using Stereo Image Scheduling

为简化数字摄影测量系统的工作流程、减少对存储空间的要求、提高工作效率,提出基于影像调度的实时核线重采样的方法。核线影像并不在定向模块中进行生成,而是在测图过程中随着测图视口的移动不断在内存中生成核线影像。同时对影像进行分层分块,采用线程调度的方式加快影像显示速度,提高刷新效率。最后通过实际航空立体影像对数据,验证该方法的可行性与有效性。实验结果表明,该方法精度满足测图要求、时间上满足现有计算机环境下的实时显示。实时核线重采样思想的应用,简化了数字摄影测量系统的工作流程,提高了工作效率,为大测区内多像对的平滑切换,实现无缝漫游提供策略支持。

In order to simplify the workflow,reduce required storage space and enhance working efficiency on digital photography system(DPS),we propose a new method of realtime epipolar resampling with image scheduling.Epipolar images are generated only in the memory with the viewport moved continuously in the mapping process instead of in the orientation module.We build image pyramids for the original images and divide them into partitions,furthermore the thread scheduling way is applied for raising image display speed.Finally,actual stereo aero-image data is used to verify the method feasible and effective.The experimental results show that the method accuracy satisfies the requirements of the mapping,and running speed is so fast that can meet the realtime display of the existing computer environment.With the application of realtime epipolar resampling,we simplify the workflow of DPW and improve work efficiency.This method can also be used for smooth switching and seamless roaming among stereo images in large survey area.