Photographic Appearance Enhancement via Detail-Based Dictionary Learning

来源 :计算机科学技术学报(英文版) | 被引量 : 0次 | 上传用户:zgys200901
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A number of edge-aware filters can efficiently boost the appearance of an image by detail decomposition and enhancement. However, they often fail to produce photographic enhanced appearance due to some visible artifacts, especially noise, halos and unnatural contrast. The essential reason is that the guidance and the constraint of high-quality appearance are not sufficient enough in the process of enhancement. Thus our idea is to train a detail dictionary from a lot of high-quality patches in order to constrain and control the entire appearance enhancement. In this paper, we propose a novel leing-based enhancement method for photographic appearance, which includes two main stages: dictionary training and sparse reconstruction. In the training stage, we construct a training set of detail patches extracted from some high-quality photos, and then train an overcomplete detail dictionary by iteratively minimizing an?1-norm energy function. In the reconstruction stage, we employ the trained dictionary to reconstruct the boosted detail layer, and further formalize a gradient-guided optimization function to improve the local coherence between patches. Moreover, we propose two evaluation metrics to measure the performance of appearance enhancement. The final experimental results have demonstrated the effectiveness of our leing-based enhancement method.
其他文献
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
新年伊始,水洞村已扬帆起航,继续按照标兵村建设要求和标准,扎实推进新农村建设,努力打造产业型新农村。  一、产业发展方面:深入挖掘我村矿藏资源潜力,同时加大招商引资和兴办矿产加工业力度,壮大村集体经济;大力发展特色种植业、养殖业,同时,合理开发七组梯子沟灰石矿,解决农闲劳动力转移200人。以“常润特种猪养殖专业合作社”为中心加大土地流转和产业结构调整。  二、基础设施建设方面:充分利用 “千村示范
目的 探讨CT对脑弥漫性轴索损伤的诊断价值。方法 对 45例脑弥漫性轴索损伤患者的早期CT表现进行回顾性分析。结果  45例脑弥漫性轴索损伤早期CT表现为弥漫性脑肿胀 45例
今年是“十二五”时期的开局之年,也是加快社会主义新农村建设向更好更快发展的关键之年。大安镇将在完善新农村基本公共设施的基础上,重点加快做大特色产业,加快创建特色环境,使新农村建设提升到新水平。  (一)工业发展:在做大做强原有工业规模的基础上,继续利用资源优势,加大招商引资和项目建设力度。积极引导和扶持加工工业,使其不断壮大,促使我镇工业发展呈现多元化趋势。  (二)特色农业种植:在巩固“一村一品
肺错构瘤是临床较少见的良性肿瘤,笔者分析了13例经手术病理证实的肺错构瘤CT扫描资料,重点讨论CT特征、误诊原因及鉴别诊断,进行回顾性分析,以期提高对该病的认识。1资料与
An open source software (OSS) ecosystem refers to an OSS development community composed of many software projects and developers contributing to these projects.
目的 明确女性生殖器原发恶性肿瘤胸部转移的X线与临床特征是重要的 ,以提高诊断水平。方法  2 0 4例女性生殖器肿瘤患者 ,以手术病理证实为恶性肿瘤 ;手术及化疗前后均摄
在胸腹部超声检查中我们常会碰到因气体干扰图像显示不清或占位性病变无法确定位置的病例而导致漏诊或误诊,我院针对性选取200例经患者有效配合呼吸运动均取得了较满意的图像
2002年8月中旬和今年7月上旬,笔者先后到河北省玉田县潮洛窝乡、天津市宝坻区大白庄镇大刘坡和宁河县大月河、河北省遵化市北营村等地察看鱼病,发现上述地区部分池塘鲤鱼摄食