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DLP4500投影正弦图时的非线性问题

(1)选择pattern sequence模式投影正弦条纹图时,会产生非线性误差,条纹状的投影结果,而不是平滑的正弦,如图所示,应该怎么解决?

(2)相机拍摄到的正弦图抽取其中一行,可以看到有很明显的高频误差,这个问题应当怎样解决?

期待得到解决办法,谢谢!