其实，全息投影是指一种将光束投影到任何需要的地方的方法。
Rather, it is a way of projecting beams of light wherever they are needed.
提出了消除或者减少投影差对变化检测结果的影响的两种方法。
Put forward to two methods for reducing the effect of projection difference.
该方法直接进行图像矩阵投影，避免高维运算。
The image matrix was directly projected to avoid high dimension operation.
该方法直接进行图像矩阵投影，避免高维运算。
The image matrix was directly projected to avoid high dimension operation.
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