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浏览/检索结果: 共2条，第1-2条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 基于计算光学的简单透镜成像技术 学位论文 硕士: 中国科学院大学, 2015 作者:  郝建坤 收藏  |  浏览/下载：107/0  |  提交时间：2016/04/11 计算光学  图像复原  简单透镜成像  空间变化PSF  去卷积   The improving speed post-processing technique for blocking artifact in transform coded images (EI CONFERENCE) 会议论文 Seventh IASTED International Conference on Signal and Image Processing, SIP 2005, August 15, 2005 - August 17, 2005, Honolulu, HI, United states He B.; Cong Y.; Wang H. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 Based on the technique [1] and the gradient continuity of natural image  an improving speed post-processing technique for the blocking artifact in transform coded image at low bit rate is presented. Moreover  the detecting function is applied to extract the adjacent two blocks with the blocking artifact and is combined with the DCT-based adaptive post-processing technique [1] for reducing the blocking artifacts of the decoded image. The new technique is used to process JPEG compressed image and results show improvement in both effective DCT operation and peak-signal to noise ratio (PSNR) with preserving the image quality.