带有阈值的块拼接纹理合成算法，即选择当前合成块时采用与特定阈值比较，而不是从最小误差块的一定范围内寻找合适的块-Patches with a threshold value of the texture synthesis algorithm, which select the current synthesis of block used with a specific threshold value, rather than from the smallest block error within a certain range to find a suitable block