An algorithm based on HMT (Hidden Markov Tree) model in wavelet-domain is put forward by Zhao Shubin, Zhang Peng,[1] etc. and it has gained a higher signal-noise ratio and a good visual effect.

• 赵书斌、张蓬[1]等人提出了一种基于小波域HMT(隐马尔可夫树)模型的彩色图像超分辨率复原算法,取得了较高的信噪比和很好的视觉效果。