实际摄影测量过程中，普通数字摄像机在拍摄与镜头距离不同的多个目标时，无法同时聚焦到所有目标而使近景影像各处都清晰。
In the actual photogrammetry process, the ordinary digital cameras can not focus all the targets then can not make sure that all close-range images are clear at the same time.
在近景镜头篮球分割中，首先根据篮球颜色分布的一致性进行彩色分割；
Firstly, the basketball segmentation in close shots is studied. According to the consistency of basketball color, color segmentation is implemented.
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