XNA处理的屏幕特效(PostShader) 可以将最终图像马赛克化-XNA deal with screen effects (PostShader) can be the final image mosaic of

sift 图像拼接，先找到两幅图像对应的特征点，然后算出变换矩阵，然后投影拼接图像-find the feature points of two images,using them to find the translate matrix,then complete the image mosaic