What is the difference between twisted and deformed key pins in Fox software?

Distortion is a technical term, which refers to abnormal changes. Can refer to external, such as morphological changes; It can also refer to internal, such as psychological changes. It can also be applied to this word in biology, which means abnormal changes in external morphology. When shooting a square object, the surrounding area is curled or swollen. It is not easy to use a long focal length lens, but it is obvious to use a wide-angle lens. Imaging defects caused by the deviation of the optical path of the main light. When the optical system corrects spherical aberration, coma, astigmatism and curvature of the image plane, the intersection of the main light and the Gaussian image plane is the image point, which is clear. However, when the intersection height y between the main light and the Gaussian image plane is not equal to the ideal imaging height y of the corresponding object point, the image is deformed, which is different from the original object.

Deformation means (1). Change the original shape (2) The distortion of the original also refers to the distorted thing. (3). Physical terms. Changes in the volume or shape of an object caused by external forces. The area of the ground scene, the distance and angle between the outline and other scenes are collectively called the geometric properties of the scene shape. Because the earth is an irregular surface, if such a surface is represented on a plane, cracks and overlaps will occur.

The area of the ground scene, the distance and angle between the outline and other scenes are collectively called the geometric properties of the scene shape. Because the earth is an irregular surface, if such a surface is represented on a plane, cracks and overlaps will occur. The extension or compression of longitude and latitude lines on the projection map can avoid these cracks and overlaps, thus forming a complete map and resulting in deformation. This deformation is manifested in: the outline of the represented scene is not similar to the outline of the corresponding scene on the ground, or the area of the represented scene is not equal to the actual area of the ground, or the distance and direction between two points have changed and are inconsistent. In a word, it is impossible to draw a perfect map.