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Stereoselective glucuronidation of carvedilol by Chinese liver microsomes
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作者 YOU Lin-ya, YU Chun-na, XIE Sheng-gu, CHEN Shu-qing, ZENG Su (Department of Drug Metabolism and Pharmaceutical Analysis, School of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China) 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2007年第10期756-764,共9页
Objective: To study the stereoselective glucuronidation of carvedilol (CARV) by three Chinese liver microsomes. Methods: The metabolites of CARV were identified by a hydrolysis reaction with β-glucuronidase and HPLC-... Objective: To study the stereoselective glucuronidation of carvedilol (CARV) by three Chinese liver microsomes. Methods: The metabolites of CARV were identified by a hydrolysis reaction with β-glucuronidase and HPLC-MS/MS. The enzyme kinetics for CARV enantiomers glucuronidation was determined by a reversed phase-high pressure liquid chromatogra-phy (RP-HPLC) assay using (S)-propafenone as internal standard after precolumn derivatization with 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosylisothiocyanate. Results: Two CARV glucuronides were found in three Chinese liver microsomes incubated with CARV. The non-linear regression analysis showed that the values of Km and Vmax for (S)-CARV and (R)-CARV enantiomers were (118±44) μmol/L, (2 500±833) pmol/(min·mg protein) and (24±7) μmol/L, (953±399) pmol/(min·mg protein), respectively. Conclusion: These results suggested that there was a significant (P<0.05) stereoselective glucuronidation of CARV enantiomers in three Chinese liver microsomes, which might partly explain the enantioselective pharmacokinetics of CARV. 展开更多
关键词 carvedILOL (CARV) DERIVATIZATION STEREOSELECTIVITY Enzyme kinetics CHINESE liver MICROSOMES
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A Study on the Task Analysis and Performance Evaluation of Carved Lacquer Craft Inheritors in Novice Stage
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作者 BAI Bin LIU Yuting LYU Xinshan 《Cultural and Religious Studies》 2021年第4期169-175,共7页
The carved lacquer craft,a gem of traditional Chinese crafts,boasts a history of over 2,000 years and features craftsmanship of a superior order.This study attempts to investigate the typical tasks and learning result... The carved lacquer craft,a gem of traditional Chinese crafts,boasts a history of over 2,000 years and features craftsmanship of a superior order.This study attempts to investigate the typical tasks and learning result evaluation of carved lacquer apprentices at the novice stage by the method of qualitative research with 11 carved lacquer craft inheritors of a studio of a carved lacquer master.It is discovered that the design of carved lacquer draft sketches,the design of carved lacquer patterns,and the making and use of carved lacquer tools are typical tasks of novice apprentices,while the modeling and aesthetics of works,carving skills,and the level of interaction with the carved lacquer community are important criteria for evaluating the development of the skills of novice apprentices. 展开更多
关键词 carved lacquer craft craft inheritors novice apprentices task analysis
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Beijing Carved Porcelain
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作者 DENG DI 《China Today》 2019年第4期68-70,共3页
CHINA is home to porcelain. There are thousands of art forms related to porcelain in the country. Among these art froms, carved porcelain is a very unique kind.
关键词 BEIJING carved PORCELAIN
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A Study on the Development and Transmission of Filial Culture in the Legend of Ding Lan Carved Wood
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作者 WANG Bo 《Cultural and Religious Studies》 2022年第5期276-280,共5页
At present,the protection of the legend of Ding Lan Carved Wood is declining and fails to give full play to its function of building filial culture.Combined with the examination of the contemporary inheritance and pro... At present,the protection of the legend of Ding Lan Carved Wood is declining and fails to give full play to its function of building filial culture.Combined with the examination of the contemporary inheritance and protection of the legend of Ding Lan Carved Wood,we make full use of the existing resources of the legend of Ding Lan Carved Wood in urban areas and unite the cities of Xuzhou,Xingping,and Jiaozuo to put forward practical and favorable suggestions for development and inheritance,and jointly promote the exploration of the development and inheritance path of the filial culture of the legend of Ding Lan Carved Wood. 展开更多
关键词 Ding Lan carved Wood filial piety culture protection INHERITANCE
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Natural Caves and Architecture Carved in the Rocks in Bosnia and Herzegovina
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作者 Ahmet Hadrovic 《Journal of Smart Buildings and Construction Technology》 2022年第2期43-60,共18页
Students of the Faculty of Architecture in Sarajevo,through the course Architecture of the Old Age,were able to get acquainted with“architecture carved in rock”,and only a very limited number of examples-the archi&#... Students of the Faculty of Architecture in Sarajevo,through the course Architecture of the Old Age,were able to get acquainted with“architecture carved in rock”,and only a very limited number of examples-the archi­tecture of ancient Egypt,ancient Greek architecture in Asia Minor(Lycia),and the architecture of ancient Persia.Many examples of this architectural expression remained unknown to them:the architecture of ancient and medieval India,the architecture of ancient and medieval China,the archi­tecture of the ancient Middle East(the area of today’s Israel,Jordan,Saudi Arabia),vernacular architecture around the world from different historical periods.As a teacher at the Faculty of Architecture in Sarajevo,the author,after switching to the education of architecture students in accordance with the“Bologna process”(2003),presented“architecture carved in the rocks”through a series of subjects,through all levels of education(undergraduate,master’s and doctoral studies),within the framework of processing narrow­er topics of architecture:constructive systems in architecture,bioclimatic architecture,architecture as an energy system,architecture in context.The complex process of creating architecture and explaining its appearance was elaborated by the author(1988)in his doctoral dissertation.The topic“Ar­chitecture Carved in Rocks”was elaborated according to this model,which on the one hand confirmed its applicability,and on the other hand enabled students to look at the highly dispersed appearance of architecture in an ex­tremely systematic way,without losing sight of its basic elements:environ­ment,man,boundaries and perspectives.The aim of this work is to show(and through examples in Bosnia and Herzegovina)that natural caves,with more or less“refining”,are still used today,and that“carving architecture into rocks”is an all-time and planetary phenomenon. 展开更多
关键词 carved architecture Bosnia and Herzegovina
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Carved Connections:Merging artisanal skill,advanced manufacturing and cultural storytelling,Yunhe turns wooden toys into carriers of Chinese culture across the globe
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作者 LIU YOUMENG 《ChinAfrica》 2026年第2期46-48,共3页
Yunhe County in Lishui City,southwestern Zhejiang Province,doesn’t have any Disney castles.Instead,it has built bridges to the world with wood.Known as“China’s town of wooden toys,”accounting for about 40 percent ... Yunhe County in Lishui City,southwestern Zhejiang Province,doesn’t have any Disney castles.Instead,it has built bridges to the world with wood.Known as“China’s town of wooden toys,”accounting for about 40 percent of the global wooden toy market,Yunhe’s story began with a small factory established in 1970.Today,it has grown into a distinctive industrial cluster with an annual output value exceeding 8 billion yuan($1.15 billion),exporting products to 82 countries and regions. 展开更多
关键词 yunhe county advanced manufacturing carved connections artisanal skill wooden toy wooden toys accounting cultural storytelling lishui city
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Jiaohe Ruins:The Carved City
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作者 Li Jing Wang Zhiwei 《China Weekly》 2025年第12期57-59,共3页
One of the-world's most pertectly presefved settlements offers valuable insight into ancient urban planing construction techniquos and the vibrant religious and cultural exchanges along the Silk Road.
关键词 urban planing construction techniquos construction techniques Silk Road religious cultural exchanges carved city perfectly preserved settlements religious exchanges Jiaohe ruins
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"Carved Silk" Masterpieces
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作者 LI YAN Courtesy of the Liaoning Provincial Museum 《Women of China》 1996年第11期44-44,共1页
"Carved silk" originated during the Five Dynasties (907-960) period and gained great popularity during the Song Dynasty (960-1279). This particular style of weave, which features the same design on both side... "Carved silk" originated during the Five Dynasties (907-960) period and gained great popularity during the Song Dynasty (960-1279). This particular style of weave, which features the same design on both sides, is clearly defined as if engraved with a knife. The distinct quality of the work led to the moniker "Carved Silk." The two most outstanding pieces of carved silk— 展开更多
关键词 carved Silk Masterpieces
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Beijing's Carved Lacquervare
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《Women of China》 1994年第11期2-3,共2页
As early as the sixth century, carved lacquerware had already appeared in China. Usually a work must be given more than 30 coats of red lacquer, and then it is carved after drying in darkness. Carved lacquerware has a... As early as the sixth century, carved lacquerware had already appeared in China. Usually a work must be given more than 30 coats of red lacquer, and then it is carved after drying in darkness. Carved lacquerware has always been regarded as a precious gift. In the past, however, lacquerware was only used in the palace; today common people enjoy its beauty and utility. The Beijing Carved Lacquerware Mill is reputed for its quality products, most of which find ready sale on the international market. Masters and students—most of whom are women—have played an important role in the development of carved lacquerware. 展开更多
关键词 Beijing’s carved Lacquervare AS
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Carved Plums
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作者 YANG SHIXI 《Women of China》 1999年第5期47-47,共1页
COMING from Dali of YunnanProvince where millions of Baiethnic people live in compactcommunities,carved plums,(or Baicarved plums),have a harvesthistory of more than one thousandyears.They are tasty,great thirst-quenc... COMING from Dali of YunnanProvince where millions of Baiethnic people live in compactcommunities,carved plums,(or Baicarved plums),have a harvesthistory of more than one thousandyears.They are tasty,great thirst-quenchers and fine appetizers. Eryuan County plums are 展开更多
关键词 carved Plums
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Carved Wooden Beds
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作者 ZHAO SHUGUO 《Women of China》 1995年第12期14-14,共1页
Zhao Shuguo, a professor at the Sculpture Department of the Sichuan Academy of Fine Arts, became interested in carved wooden beds with their intricate patterns when he went into the midst of the common people to colle... Zhao Shuguo, a professor at the Sculpture Department of the Sichuan Academy of Fine Arts, became interested in carved wooden beds with their intricate patterns when he went into the midst of the common people to collect folk art carvings. Ever since he has collected and studied these beds which were recenfiy displayed in a special exhibition. The carved wooden beds, made during the Ming and Qing dynasties (1368- 展开更多
关键词 carved Wooden Beds
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面向DCT系数分析的Seam Carving对象移除定位方法
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作者 蔺聪 马鸿基 +3 位作者 司徒晓晴 甄荣桂 肖洪涛 邓宇乔 《计算机工程与科学》 北大核心 2025年第10期1787-1798,共12页
随着数字图像处理技术的飞速发展,图像篡改手段日益多样化和隐蔽化,其中一种重要篡改方式就是对象移除。Seam Carving可应用于调整图像大小和对象移除。针对通过Seam Carving进行对象移除这一篡改方式,首次将双量化效应引入Seam Carvin... 随着数字图像处理技术的飞速发展,图像篡改手段日益多样化和隐蔽化,其中一种重要篡改方式就是对象移除。Seam Carving可应用于调整图像大小和对象移除。针对通过Seam Carving进行对象移除这一篡改方式,首次将双量化效应引入Seam Carving对象移除,根据Seam Carving对象移除过程中产生的DCT异常块,提出了一种基于DCT系数分析的Seam Carving对象移除定位方法。首先,提取JPEG图像中的量化矩阵和DCT系数直方图。其次,根据直方图估算出主要量化矩阵和原始DCT系数,并使用贝叶斯方法估算出图像篡改区域的后验概率图。最后,对该后验概率图进行去噪和定位,得到移除区域的准确位置。实验结果表明,该方法能够有效地检测和定位Seam Carving对象移除,为该问题的解决提供了一种新的研究思路。 展开更多
关键词 图像取证 篡改检测 对象移除 Seam Carving 双量化效应
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The Power of History
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作者 《China Today》 2025年第7期16-19,共4页
President Xi Jinping calls for preserving and promoting cultural relics and museums to carry forward Chinese civilization.ON May 19,one day after the International Museum Day,Chinese President Xi Jinping visited the L... President Xi Jinping calls for preserving and promoting cultural relics and museums to carry forward Chinese civilization.ON May 19,one day after the International Museum Day,Chinese President Xi Jinping visited the Longmen Grottoes in Luoyang,central China’s Henan Province.With 2,345 caves and alcoves,nearly 110,000 Buddhist statues,over 2,800 inscriptions,and nearly 80 pagodas,the Longmen Grottoes was recognized by UNESCO as the pinnacle of Chinese stone carving art. 展开更多
关键词 stone carving longmen grottoes Longmen Grottoes MUSEUMS caves alcovesnearly HISTORY preserving promoting cultural relics Chinese civilization
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Application of a multi-monitoring system and its temperature correction
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作者 LIU Songyuan YANG Peixi +1 位作者 HE ManChao TAO Zhigang 《Journal of Mountain Science》 2025年第2期681-694,共14页
The Dazu Rock Carvings in Chongqing were inscribed on the World Heritage List in 1999.In recent years,the Dazu Rock Carvings have faced environmental challenges such as geological forces,increased precipitation,pollut... The Dazu Rock Carvings in Chongqing were inscribed on the World Heritage List in 1999.In recent years,the Dazu Rock Carvings have faced environmental challenges such as geological forces,increased precipitation,pollution and tourism,which have led to rock deterioration and structural instability.The multi-source monitoring system for the protection of the rock carvings,based on the Internet of Things,includes Global Navigation Satellite System(GNSS)displacement monitoring,static level displacement monitoring,laser rangefinder displacement monitoring,roof pressure sensor monitoring and environmental damage monitoring.This paper analyses data from each sub-monitoring system within the multi-source monitoring system applied to Yuanjue Cave in the Dazu Rock Carvings.Initially,a correlation analysis between climate monitoring data and roof displacement data was carried out to assess the effect of temperature.Based on the results of the analysis,a temperature correction equation for the laser rangefinder was derived to improve the laser rangefinder displacement monitoring system.The improved system was then used to monitor Cave 168,revealing the deformation and erosion patterns of the roof.The research results demonstrate that the multiparameter monitoring system is capable of accurately measuring and analyzing the stability of the Dazu stone carvings,as well as the effects of environmental conditions on them.The use of the Internet of Things(IoT)and real-time data collection to monitor rock deformation and environmental conditions is an innovative application of technology in cultural heritage conservation.Interpretation of the monitoring system and statistical correlation analysis of temperature and laser rangefinder data highlight the thoroughness of the methodology in this paper and its relevance to sustainable mountain development.In the future,multi-source monitoring systems will have a broader application in the conservation of other UNESCO World Heritage Sites. 展开更多
关键词 Multi-source Monitoring System Data Fitting Dazu Rock Carvings Rock Cave Protection
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对用稳定图识别真假模态的一点改进 被引量:10
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作者 罗文波 夏松波 +1 位作者 王莉 邹经相 《应用力学学报》 CAS CSCD 北大核心 1999年第2期112-116,共5页
利用单位样值响应矩阵和自由响应的特征值分解形式中的特征值前的系数矩阵的范数作为稳定判据,结合稳定图识别真假模态。计算表明,本方法具有较好的分解能力。
关键词 CARV模型 参数识别 稳定图 振动系统
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改进的Seam Carving瞬时频率估计算法研究 被引量:7
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作者 赵晓平 吴家新 周子贤 《南京信息工程大学学报(自然科学版)》 CAS 2017年第2期214-219,共6页
旋转机械升降速阶段微弱振动信号具有潜在性和动态响应的微弱性等特点,因此瞬时频率是限制早期故障诊断发展的关键问题.针对这一问题,该文引入了图像处理领域的Seam Carving(SC)算法,并对SC算法进行改进,结合短时傅里叶变换(Short-Time ... 旋转机械升降速阶段微弱振动信号具有潜在性和动态响应的微弱性等特点,因此瞬时频率是限制早期故障诊断发展的关键问题.针对这一问题,该文引入了图像处理领域的Seam Carving(SC)算法,并对SC算法进行改进,结合短时傅里叶变换(Short-Time Fourier Transformation,STFT),提出了STFT-SC瞬时频率估计算法.STFT-SC算法采用STFT对振动信号进行时频分析,然后利用Seam Carving算法中的能量梯度,采用动态规划的思想寻求seam路径,实现了旋转机械振动信号的一阶瞬时频率提取,最后对一阶时频数据进行时域重构,将重构的时域信号和仿真信号进行相关性分析.结果表明,STFT-SC算法对于高噪声、邻近阶比等振动信号都具有非常好的效果. 展开更多
关键词 旋转机械 SEAM Carving算法 瞬时频率估计 能量梯度
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基于Seam Carving的逐帧优化视频缩放方法 被引量:3
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作者 林晓 杨明晖 +2 位作者 马利庄 邹盼盼 蒋林华 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2015年第7期1298-1303,共6页
视频缩放是近年来数字图像处理领域的一项热点问题.针对整个视频进行缩放的方法会带来庞大的内存占用与计算量,导致效率低下、实用性较差;而针对视频中的每一帧进行缩放的方法难以维持视频的时空一致性.为此,基于Seam Carving方法,提出... 视频缩放是近年来数字图像处理领域的一项热点问题.针对整个视频进行缩放的方法会带来庞大的内存占用与计算量,导致效率低下、实用性较差;而针对视频中的每一帧进行缩放的方法难以维持视频的时空一致性.为此,基于Seam Carving方法,提出一种逐帧优化的视频缩放方法.首先逐帧读入视频,按照梯度求出当前帧的能量图,并使用高速缓存的置换思想调整能量图;然后根据能量图找出缝;最后使用线性插值的方法删除缝,得到目标大小的帧.实验结果表明,该方法不仅能够在所处理的每一帧中保持图像的重要内容,并且可以维持整个视频的时空一致性,保持较好的视觉效果. 展开更多
关键词 视频缩放 SEAM CARVING 线性插值 高速缓存
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一种改进的Seam Carving图像缩放算法 被引量:3
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作者 王金庭 杨敏 吴巍 《红外技术》 CSCD 北大核心 2014年第12期986-991,共6页
针对图像非比例缩放时出现的失真,基于Seam Carving算法进行了研究:重新定义了显著能量,以突出图像的重要内容;优化了基于能量图的查找方法,通过减少像素线穿越图像中重要内容的次数,以保护图像重要内容不被扭曲;结合双线性插值以限制... 针对图像非比例缩放时出现的失真,基于Seam Carving算法进行了研究:重新定义了显著能量,以突出图像的重要内容;优化了基于能量图的查找方法,通过减少像素线穿越图像中重要内容的次数,以保护图像重要内容不被扭曲;结合双线性插值以限制抽取像素线的数目,以避免图像内容过度抽取。实验结果表明,改进算法能够更好的保护图像中的重要内容、提高图像缩放的质量,并提升Seam Carving算法的执行效率。 展开更多
关键词 SEAM CARVING 图像缩放 显著能量 内容感知
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Seam Carving和显著性分析的图像缩放方法研究 被引量:2
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作者 王玺 夏清国 +1 位作者 窦召虎 李群组 《计算机工程与应用》 CSCD 北大核心 2011年第30期168-171,197,共5页
提出一种基于Seam Carving和显著性分析相结合的图像缩放方法。通过不断移除(插入)缝合线来实现对图像尺寸的缩小(放大)。通过研究Seam Carving在图像缩放及目标保留移除中存在的问题,已有的基于像素点计算图像能量函数的方法会对某些... 提出一种基于Seam Carving和显著性分析相结合的图像缩放方法。通过不断移除(插入)缝合线来实现对图像尺寸的缩小(放大)。通过研究Seam Carving在图像缩放及目标保留移除中存在的问题,已有的基于像素点计算图像能量函数的方法会对某些图像失效,提出一种基于显著性区域求解图像能量函数的SDRS方法。实验结果表明,Seam Carving方法对自然图像的处理能够达到令人满意的效果。Seam Carving方法和SDRS方法的结合,也是一个创新点。 展开更多
关键词 SEAM CARVING 尺寸缩放 能量函数 显著区域检测和分割(SRDS)
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基于全局图像结构信息的Seam Carving算法 被引量:2
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作者 聂栋栋 马勤勇 《计算机应用研究》 CSCD 北大核心 2011年第3期1198-1200,共3页
提出了一种基于全局图像结构信息的Seam Carving算法,它根据像素的重要性修改图像尺寸和比例。通过从图像提取特定方向的边缘结构信息,再利用每个像素的梯度信息,从全局和局部两方面定义新的像素能量计算函数,以此来阻止seam通路与特定... 提出了一种基于全局图像结构信息的Seam Carving算法,它根据像素的重要性修改图像尺寸和比例。通过从图像提取特定方向的边缘结构信息,再利用每个像素的梯度信息,从全局和局部两方面定义新的像素能量计算函数,以此来阻止seam通路与特定方向图像边缘的交叉,避免边缘像素的不一致位移,以此保持图像的边缘结构。实验结果证明,算法减少了处理后图像的结构形变,有效改进了Seam Carving算法的处理效果。 展开更多
关键词 SEAM Carving算法 seam通路 边缘提取 像素梯度 动态规划
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