Skeletal animation key frame compression method and device

Abstract

The invention discloses a skeletal animation key frame compression method, which comprises the following steps of: reading the content of an animation file, and generating a skeletal node tree of eachthree-dimensional model in the animation file;counting the number of the indirect progenies of each node, and sorting the nodes of the skeleton node tree from large to small according to the number of the indirect progenies of each node to form a skeleton node sequence; distributing corresponding error thresholds for the nodes in the skeleton node sequence from front to back according to a sequence from small to large; and comparing the error threshold value corresponding to each node with the distance between the animation frame and the skeleton parameter corresponding to each node in the adjacent front and back frames so as to retain or remove the nodes in the animation frame to form a compressed animation file. The invention further discloses a corresponding skeletal animation key frame compression device. The method and the device have the beneficial effects that the key frame density of the tail end skeleton nodes is specifically compressed, so that the distribution cost of gamesoftware or video animations and the like is reduced on the premise of ensuring the overall quality of the animations.

Description

technical field [0001] The present application relates to the field of computer graphics, in particular to a method and device for compressing skeletal animation key frames. Background technique [0002] In the field of computer graphics, there are currently two mainstream animation types: key frame animation and skeletal animation. In keyframe animation, the 3D model is just a fixed "pose" in each keyframe. An animator draws "snapshots" (ie, key frames) of multiple key actions during the movement of the 3D model, and the computer performs interpolation and smoothing calculations based on two adjacent key frames, so as to obtain a smoother image of the 3D model. animation. Although the keyframe animation only needs to perform interpolation calculations, the amount of calculation is relatively small compared to skeletal animation; however, because the interpolation calculations can only be performed based on keyframes with a fixed "pose", on the one hand, for complex combin...

AI Technical Summary

Problems solved by technology

Since this method does not take into account the parent-child relationship between bones, it often leads to poor animation quality after streamlining, and it is prone to shaking

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