偏角摄影是让光线以一定的角度照射到物体表面同时在对应的反射角的方向上记录物体亮度分布的一种摄影方法。对于偏角摄影得到的变形图像进行矫正的方法一般分两步 :一是把变形图像的像素坐标按照变形图像与标准图像之间的交换函数将其还原为标准图像的坐标 ;二是利用灰度内插法确定矫正后的图像像素的灰度值。 Angular photography is a photographic method that records the intensity distribution of an object in the direction of the corresponding reflection angle by allowing light to strike an object at an angle. The method of correcting the deformation image obtained by the angled photography is generally divided into two steps: firstly, the pixel coordinates of the deformed image are restored to the coordinates of the standard image according to the exchange function between the deformed image and the standard image; secondly, Interpolation method to determine the corrected image pixel gray value.