裁切画面 Cropping 将放大照片的周围裁切掉。作法与修剪一样，但完成的尺寸，由周围被裁切而得较小。
先来看一张宇航局发射基地的样张，高耸的航天飞机矗立在宽大的发射平台上，如果我们每次裁切画面的一部分放大的话，你能看到更多的细节内容。
First look at a NASA launch site in the proofs, the towering space shuttle launch platform stands in large, if every time we cut part of the picture to enlarge it, you can see more details.
但灯塔应该是拍摄的主体，我知道材质化的天空会显得分量过重，所以我对画面进行了裁切，使天空占据画面的2/3。
Although the lighthouse would be the main subject, I knew that the textured sky would weigh heavily, so I cropped it so that it took up 2/3rds of my image.
零视差取决于从左侧画面的左边沿到右侧画面的右边沿的裁切列。
The zero parallax is controlled by trimming columns the left of the left image and off the right of the right image, this is described here.
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