The significance of ae real shot three-dimensional inverse camera

Through the software analysis of real pictures, the tracking points are calculated, and then the real motion trajectory of the camera, as well as the corresponding spatial information and lens parameters are calculated in three-dimensional software by using some characteristics of the calculated tracking points.

Countercurrent: 1 First determine the movement type of the lens, that is, translation movement and rotation movement; Secondly, determine the aperture and focal length of the camera; Thirdly, calculating lens distortion parameters; Third, correct the distortion of the image; Third, manually add tracking nodes and try to track them one by one (six high-quality tracking points are far better than a bunch of inaccurate points). Fourth, enlarge the tracking box after tracking and manually optimize the accuracy of tracking points. 6 aim the camera at the scene. 7 output the tracking results, and import stmap8 into the synthesis software for testing.

Reverse technology of camera trajectory. Its appearance makes the motion matching function in digital stunt synthesis technology tend to be complete, and also makes it easier and more accurate for creators to synthesize moving pictures in the creative process. In the post-synthesis stage, the traditional image tracking technology can only track the movement of objects in the image, but can't do anything about the camera movement outside the image. At the same time, the visual angle change of the tracked object in the picture can only be simulated by the "four-point tracking" technology, which is essentially different from the visual angle change of the object in actual shooting. Therefore, when the tracked object is covered or smeared, it is often impossible to complete the accurate tracking operation.