期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
New Blocking Artifacts Reduction Method Based on Wavelet Transform
1
作者 SHI Min YI Qing-ming 《Semiconductor Photonics and Technology》 CAS 2007年第1期43-47,共5页
It is well known that a block discrete cosine transform compressed image exhibits visually annoying blocking artifacts at low-bit-rate. A new post-processing deblocking algorithm in wavelet domain is proposed. The alg... It is well known that a block discrete cosine transform compressed image exhibits visually annoying blocking artifacts at low-bit-rate. A new post-processing deblocking algorithm in wavelet domain is proposed. The algorithm exploits blocking-artifact features shown in wavelet domain. The energy of blocking artifacts is concentrated into some lines to form annoying visual effects after wavelet transform. The aim of reducing blocking artifacts is to capture excessive energy on the block boundary effectively and reduce it below the visual scope. Adaptive operators for different subbands are computed based on the wavelet coefficients. The operators are made adaptive to different images and characteristics of blocking artifacts. Experimental results show that the proposed method can significantly improve the visual quality and also increase the peak signal-noise-ratio(PSNR) in the output image. 展开更多
关键词 block discrete cosine transform(BDCT) blocking artifacts wavelet transform
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部