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Content-based Image Retrieval Using Color Histogram 被引量:3
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作者 黄文蓓 贺樑 顾君忠 《Journal of Donghua University(English Edition)》 EI CAS 2006年第4期98-102,共5页
This paper introduces the principles of using color histogram to match images in CBIR. And a prototype CBIR system is designed with color matching function. A new method using 2-dimensional color histogram based on hu... This paper introduces the principles of using color histogram to match images in CBIR. And a prototype CBIR system is designed with color matching function. A new method using 2-dimensional color histogram based on hue and saturation to extract and represent color information of an image is presented. We also improve the Euclidean-distance algorithm by adding Center of Color to it. The experiment shows modifications made to Euclidean-distance signif-icantly elevate the quality and efficiency of retrieval. 展开更多
关键词 CBIR (content-based image retrieval color feature color histogram histogram intersection similarity measure.
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A Privacy-Preserving Image Retrieval Based on AC-Coefficients and Color Histograms in Cloud Environment
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作者 Zhihua Xia Lihua Lu +3 位作者 Tong Qiu H.J.Shim Xianyi Chen Byeungwoo Jeon 《Computers, Materials & Continua》 SCIE EI 2019年第1期27-43,共17页
Content based image retrieval(CBIR)techniques have been widely deployed in many applications for seeking the abundant information existed in images.Due to large amounts of storage and computational requirements of CBI... Content based image retrieval(CBIR)techniques have been widely deployed in many applications for seeking the abundant information existed in images.Due to large amounts of storage and computational requirements of CBIR,outsourcing image search work to the cloud provider becomes a very attractive option for many owners with small devices.However,owing to the private content contained in images,directly outsourcing retrieval work to the cloud provider apparently bring about privacy problem,so the images should be protected carefully before outsourcing.This paper presents a secure retrieval scheme for the encrypted images in the YUV color space.With this scheme,the discrete cosine transform(DCT)is performed on the Y component.The resulting DC coefficients are encrypted with stream cipher technology and the resulting AC coefficients as well as other two color components are encrypted with value permutation and position scrambling.Then the image owner transmits the encrypted images to the cloud server.When receiving a query trapdoor form on query user,the server extracts AC-coefficients histogram from the encrypted Y component and extracts two color histograms from the other two color components.The similarity between query trapdoor and database image is measured by calculating the Manhattan distance of their respective histograms.Finally,the encrypted images closest to the query image are returned to the query user. 展开更多
关键词 Image retrieval AC-coefficients histogram color histogram discrete cosine transform
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Image retrieval based on color features integrated with anisotropic directionality 被引量:1
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作者 Jing Bai Xiaohua Wang Licheng Jiao 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第1期127-133,共7页
A novel image retrieval approach based on color features and anisotropic directional information is proposed for content based image retrieval systems (CBIR). The color feature is described by the color histogram ... A novel image retrieval approach based on color features and anisotropic directional information is proposed for content based image retrieval systems (CBIR). The color feature is described by the color histogram (CH), which is translation and rotation invariant. However, the CH does not contain spatial information which is very important for the image retrieval. To overcome this shortcoming, the subband energy of the lifting directionlet transform (L-DT) is proposed to describe the directional information, in which L-DT is characterized by multi-direction and anisotropic basis functions compared with the wavelet transform. A global similarity measure is designed to implement the fusion of both color feature and anisotropic directionality for the retrieval process. The retrieval experiments using a set of COREL images demonstrate that the higher query precision and better visual effect can be achieved. 展开更多
关键词 image retrieval color histogram directionlet transform ANISOTROPIC similarity.
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Integrating Color and Spatial Feature for Content-Based Image Retrieval 被引量:1
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作者 Cao Kui Feng Yu-cai 《Wuhan University Journal of Natural Sciences》 EI CAS 2002年第3期290-296,共7页
In this paper, we present a novel and efficient scheme for extracting, indexing and retrieving color images. Our motivation was to reduce the space overhead of partition-based approaches taking advantage of the fact t... In this paper, we present a novel and efficient scheme for extracting, indexing and retrieving color images. Our motivation was to reduce the space overhead of partition-based approaches taking advantage of the fact that only a relatively low number of distinct values of a particular visual feature is present in most images. To extract color feature and build indices into our image database we take into consideration factors such as human color perception and perceptual range, and the image is partitioned into a set of regions by using a simple classifying scheme. The compact color feature vector and the spatial color histogram, which are extracted from the seqmented image region, are used for representing the color and spatial information in the image. We have also developed the region-based distance measures to compare the similarity of two images. Extensive tests on a large image collection were conducted to demonstrate the effectiveness of the proposed approach. 展开更多
关键词 color distribution spatial color histogram region-based image representation and retrieval similarity matching integrating of single features
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An Image Retrieval Method Based on Color and Texture Features
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作者 刘伟节 胡剑凌 许成亮 《Journal of Shanghai Jiaotong university(Science)》 EI 2006年第4期537-542,共6页
The technique of image retrieval is widely used in science experiment, military affairs, public security, advertisement, family entertainment, library and so on. The existing algorithms are mostly based on the charact... The technique of image retrieval is widely used in science experiment, military affairs, public security, advertisement, family entertainment, library and so on. The existing algorithms are mostly based on the characteristics of color, texture, shape and space relationship. This paper introduced an image retrieval algorithm, which is based on the matching of weighted EMD(Earth Mover’s Distance) distance and texture distance. EMD distance is the distance between the histograms of two images in HSV(Hue, Saturation, Value) color space, and texture distance is the L1 distance between the texture spectra of two images. The experimental results show that the retrieval rate can be increased obviously by using the proposed algorithm. 展开更多
关键词 image retrieval color histogram earth Mover's distance(EMD) TEXTURE spectrum
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Image Retrieval Approach Based on Intuitive Fuzzy Set Combined with Genetic Algorithm
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作者 王潇茵 徐卫华 胡昌振 《Journal of Beijing Institute of Technology》 EI CAS 2009年第1期60-64,共5页
Aiming at shortcomings of traditional image retrieval systems, a new image retrieval approach based on color features of image combining intuitive fuzzy theory with genetic algorithm is proposed. Each image is segment... Aiming at shortcomings of traditional image retrieval systems, a new image retrieval approach based on color features of image combining intuitive fuzzy theory with genetic algorithm is proposed. Each image is segmented into a constant number of sub-images in vertical direction. Color features are extracted from every sub-image to get chromosome coding. It is considered that fuzzy membership and intuitive fuzzy hesitancy degree of every pixel's color in image are associated to all the color histogram bins. Certain feature, fuzzy feature and intuitive fuzzy feature of colors in an image, are used together to describe the content of image. Efficient combinations of sub-image are selected according to operation of selecting, crossing and variation. Retrieval results are obtained from image matching based on these color feature combinations of sub-images. Tests show that this approach can improve the accuracy of image retrieval in the case of not decreasing the speed of image retrieval. Its mean precision is above 80 %. 展开更多
关键词 intuitive fuzzy genetic algorithm color histogram image retrieval
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Video Retrieval Using Color and Spatial Information of Human Appearance
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作者 Sofina Yakhu Nikom Suvonvorn 《通讯和计算机(中英文版)》 2012年第6期636-643,共8页
关键词 基于内容的视频检索 外观颜色 空间信息 人性化 视频监控系统 目标搜索 视频数据 VR系统
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“哨兵-2”卫星影像及C2RCC算法在太湖冬春季水色分析中的应用
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作者 李旭文 张悦 +6 位作者 姜晟 王甜甜 崔嘉宇 纪轩禹 陈冰 魏玉强 陈栋 《中国环境监测》 CAS CSCD 北大核心 2024年第3期271-282,共12页
利用太湖2019—2022年冬春季“哨兵-2”卫星10 m分辨率的MSI影像和SNAP软件C2RCC(Case 2 Regional CoastColour)模块,以适合浑浊、富营养程度较高、光学复杂的“二类水体”的C2X-nets为模式,开展太湖叶绿素a、总悬浮物浓度、透明度等水... 利用太湖2019—2022年冬春季“哨兵-2”卫星10 m分辨率的MSI影像和SNAP软件C2RCC(Case 2 Regional CoastColour)模块,以适合浑浊、富营养程度较高、光学复杂的“二类水体”的C2X-nets为模式,开展太湖叶绿素a、总悬浮物浓度、透明度等水色参数反演。结果表明:冬春季太湖各湖区叶绿素a浓度处于较低水平,但4月中旬起有明显抬升;太湖西部沿岸区、南部沿岸区和湖心区总悬浮物浓度较高,表明这些湖区易受风浪影响,造成沉积物再悬浮;太湖东部沿岸区、北部湖湾及东太湖遥感反演的水体清澈度较高,可能与这些湖区冬春季沉水植物菹草的分布有关,菹草生长对水质有较好的净化效果。总体来看,基于C2X-nets模式的C2RCC反演算法从较高分辨率卫星遥感影像中提取的水色信息,能有效反映太湖冬春季水色指标的空间分布特征,可为湖体生态状况及动态变化的长期监测评估提供有价值的参考。 展开更多
关键词 哨兵-2 遥感 C2RCC算法 水色反演 太湖
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Shape, Color and Texture Based CBIR System Using Fuzzy LogicClassifier
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作者 D.Yuvaraj M.Sivaram +1 位作者 B.Karthikeyan Jihan Abdulazeez 《Computers, Materials & Continua》 SCIE EI 2019年第6期729-739,共11页
The perfect image retrieval and retrieval time are the two major challenges inCBIR systems. To improve the retrieval accuracy, the whole database is searched basedon many image characteristics such as color, shape, te... The perfect image retrieval and retrieval time are the two major challenges inCBIR systems. To improve the retrieval accuracy, the whole database is searched basedon many image characteristics such as color, shape, texture and edge information whichleads to more time consumption. This paper presents a new fuzzy based CBIR method,which utilizes colour, shape and texture attributes of the image. Fuzzy rule based systemis developed by combining color, shape, and texture feature for enhanced image recovery.In this approach, DWT is used to pull out the texture characteristics and the region basedmoment invariant is utilized to pull out the shape features of an image. Color similarityand texture attributes are extorted using customized Color Difference Histogram (CDH).The performance evaluation based on precision and BEP measures reveals the superiorityof the proposed method over renowned obtainable approaches. 展开更多
关键词 Image retrieval color histogram texture edge orientation retrieval accuracy
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A Clustering Algorithm for Key Frame Extraction Based on Density Peak
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作者 Hong Zhao Tao Wang Xiangyan Zeng 《Journal of Computer and Communications》 2018年第12期118-128,共11页
Aiming at the problem of video key frame extraction, a density peak clustering algorithm is proposed, which uses the HSV histogram to transform high-dimensional abstract video image data into quantifiable low-dimensio... Aiming at the problem of video key frame extraction, a density peak clustering algorithm is proposed, which uses the HSV histogram to transform high-dimensional abstract video image data into quantifiable low-dimensional data, and reduces the computational complexity while capturing image features. On this basis, the density peak clustering algorithm is used to cluster these low-dimensional data and find the cluster centers. Combining the clustering results, the final key frames are obtained. A large number of key frame extraction experiments for different types of videos show that the algorithm can extract different number of key frames by combining video content, overcome the shortcoming of traditional key frame extraction algorithm which can only extract a fixed number of key frames, and the extracted key frames can represent the main content of video accurately. 展开更多
关键词 KEY FRAME Clustering algorithm HSV color histogram
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基于RGB色彩平衡方法的沙尘降质图像增强 被引量:5
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作者 丁元 邬开俊 《光学精密工程》 EI CAS CSCD 北大核心 2023年第7期1053-1064,共12页
针对沙尘环境下室外图像存在的色差,低对比度以及低清晰度的问题,提出一种基于RGB色彩平衡方法的沙尘降质图像增强算法,该算法主要包括色彩校正、对比度提升两个任务。针对沙尘图像色彩分布的特殊性以及灰色世界算法的启示,提出了保持... 针对沙尘环境下室外图像存在的色差,低对比度以及低清晰度的问题,提出一种基于RGB色彩平衡方法的沙尘降质图像增强算法,该算法主要包括色彩校正、对比度提升两个任务。针对沙尘图像色彩分布的特殊性以及灰色世界算法的启示,提出了保持颜色分量均值的RGB色彩平衡方法(RGBCbm),使得RGB三通道分量根据颜色分量的均值进行拉伸,有效去除了图像中沙尘造成的色幕问题,进一步采用带色彩恢复的多尺度视网膜增强算法提高色彩校正结果;利用相对全局直方图拉伸算法结合Lab颜色模型对图像的对比度、色彩以及明亮度进行最后的增强和校正。对实验数据进行测试,结果表明,该算法可以有效解决各类沙尘降质图像的色差问题,并在提高图像色彩丰富性和对比度的同时增强图像细节的清晰度。与其他先进算法相比,水下图像质量指数和图像对比度指数分别达到了0.602和0.994,分别提高了0.140和0.018。 展开更多
关键词 计算机视觉 沙尘图像增强 色彩平衡 颜色校正 多尺度视网膜增强算法 相对全局直方图拉伸算法
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北冰洋有色溶解有机物与溶解有机碳遥感监测
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作者 李正茂 黄珏 张珂 《海洋科学进展》 CAS CSCD 北大核心 2023年第1期148-156,共9页
借助MODIS卫星数据,利用准分析算法(Quasi-Analytical Algorithm,QAA)反演得到2010年与2011年夏季北冰洋表层水体有色溶解有机物(Colored Dissolved Organic Matter,CDOM)吸收系数,并依据实测反射率数据将CDOM与溶解有机碳(Dissolved Or... 借助MODIS卫星数据,利用准分析算法(Quasi-Analytical Algorithm,QAA)反演得到2010年与2011年夏季北冰洋表层水体有色溶解有机物(Colored Dissolved Organic Matter,CDOM)吸收系数,并依据实测反射率数据将CDOM与溶解有机碳(Dissolved Organic Carbon,DOC)分类,研究不同波段(412、443、490、532、555、667 nm)、不同类别的CDOM与DOC的相关性差异,在此基础上建立增强回归树模型,分析影响DOC质量浓度变化的主要驱动因素。结果表明:使用QAA反演北冰洋表层水体CDOM吸收系数具有较高的精度;反射波峰位于555 nm时,CDOM与DOC相关性(R^(2)=0.95)高于整体相关性(R^(2)=0.94),CDOM的反演精度更高(R^(2)=0.88,MRE=28.6%);反射峰位于490或465 nm时,CDOM与DOC相关性较弱(R^(2)=0.76),CDOM的反演精度较低(R^(2)=0.37,MRE=36.4%)。影响因素分析表明,CDOM、悬浮颗粒物以及叶绿素a是影响北冰洋夏季DOC质量浓度变化的主要驱动因素。 展开更多
关键词 北冰洋 有色溶解有机物 准分析算法(QAA) 溶解有机碳 遥感反演
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The optimal retrieval of ocean color constituent concentrations based on the variational method 被引量:1
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作者 YU Hong FAN Zhe DU Hua-dong 《Journal of Hydrodynamics》 SCIE EI CSCD 2013年第1期62-71,共10页
In this paper, a new approach to the optimal retrieval of the ocean color based on the variational method is developed by setting up a rational target functional combining with the Broydor Fletcher, Goldfarb, Shanno ... In this paper, a new approach to the optimal retrieval of the ocean color based on the variational method is developed by setting up a rational target functional combining with the Broydor Fletcher, Goldfarb, Shanno (BFGS) optimal algorithm. The numerical tests and the exemplary retrievals are carried out and compared with the statistical retrievals and the optimal retrievals based on the genetic algorithm. The results show that this approach enjoys a higher accuracy as compared to the statistical method and a higher efficiency as compared to the genetic algorithm. The optimal retrieval method presented in this paper provides a new idea for the ocean color inversion and could also be used as a reference for the direct assimilation of the satellite data into the ecological models. 展开更多
关键词 ocean color optimal retrieval variational method Broydor Fletcher Goldfarb Shanno (BFGS) algorithm
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Color-image retrieval based on fuzzy correlation
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作者 ZHAIHongchen LIANGYanmei MUGuoguang 《Science in China(Series F)》 2004年第3期295-300,共6页
We report a method of color-image retrieval based on fuzzy correlation, inwhich α-cut relations in fuzzy set theory are applied to defining color match and heightmatch of color peaks for synthesizing fuzzy correlatio... We report a method of color-image retrieval based on fuzzy correlation, inwhich α-cut relations in fuzzy set theory are applied to defining color match and heightmatch of color peaks for synthesizing fuzzy correlation of two color histograms, and RGBspace is partitioned into six sub-regions in the experiment for the regional colorcomparisons. Experimental results show that the efficiency of the color-image retrievalcan be effectively improved by this approach. 展开更多
关键词 color—image retrieval color histogram fuzzy correlation
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基于视觉权值的分块颜色直方图图像检索算法 被引量:35
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作者 王向阳 杨红颖 +1 位作者 郑宏亮 吴俊峰 《自动化学报》 EI CSCD 北大核心 2010年第10期1489-1492,共4页
为了进一步提高基于颜色直方图的图像检索系统工作效率,本文以人眼视觉感知特性为基础,结合局部图像相关性,提出了一种基于视觉权值的分块颜色直方图图像检索新方法.该方法首先对图像进行分块处理,并计算出图像子块的颜色直方图;然后结... 为了进一步提高基于颜色直方图的图像检索系统工作效率,本文以人眼视觉感知特性为基础,结合局部图像相关性,提出了一种基于视觉权值的分块颜色直方图图像检索新方法.该方法首先对图像进行分块处理,并计算出图像子块的颜色直方图;然后结合反映局部区域变化的像素点颜色复杂度,计算出图像子块的视觉权值;最后利用视觉权值对子块颜色直方图进行加权处理,并根据加权颜色直方图进行图像检索.仿真实验结果表明,本文算法能够准确和高效地查找出用户所需内容的彩色图像,并且具有较好的查准率和查全率. 展开更多
关键词 图像检索 分块颜色直方图 颜色复杂度 视觉权值
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一种基于HSV空间的彩色边缘图像检索方法 被引量:24
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作者 杨红颖 吴俊峰 +1 位作者 于永健 王向阳 《中国图象图形学报》 CSCD 北大核心 2008年第10期2035-2038,共4页
结合重要的彩色图像边缘及人眼视觉特性,提出了一种基于彩色边缘直方图的图像检索方法。该方法首先利用Canny检测算子提取出原始图像的彩色边缘信息,然后将彩色图像边缘转换至符合人眼视觉特性的HSV空间并进行量化处理,再将彩色边缘划... 结合重要的彩色图像边缘及人眼视觉特性,提出了一种基于彩色边缘直方图的图像检索方法。该方法首先利用Canny检测算子提取出原始图像的彩色边缘信息,然后将彩色图像边缘转换至符合人眼视觉特性的HSV空间并进行量化处理,再将彩色边缘划分成圆环区域和角形区域,并分别计算出圆环区域和角形区域的颜色直方图,最后综合利用上述圆环区域和角形区域的颜色直方图计算图像间内容的相似度,并进行彩色图像检索。仿真实验表明,该方法能够准确和高效地查找出用户所需内容的彩色图像,并且具有较好的查准率和查全率。 展开更多
关键词 图像检索 HSV颜色空间 彩色图像边缘 颜色直方图
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基于HSV分块颜色直方图的图像检索算法 被引量:51
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作者 姜兰池 沈国强 张国煊 《机电工程》 CAS 2009年第11期54-57,共4页
针对基于颜色的图像检索问题,提出了一种新的基于HSV非均匀量化分块颜色直方图的图像检索方法。分块直方图算法把图像固定分成若干子块,分别计算子块的颜色特征。将含有重要空间信息的分块设置权值,并将不注重空间信息的分块权值设为零... 针对基于颜色的图像检索问题,提出了一种新的基于HSV非均匀量化分块颜色直方图的图像检索方法。分块直方图算法把图像固定分成若干子块,分别计算子块的颜色特征。将含有重要空间信息的分块设置权值,并将不注重空间信息的分块权值设为零。此算法充分利用了HSV非均匀量化和图像分块的优点,改善了颜色特征缺乏空间信息的缺点。研究结果表明,基于HSV非均匀量化分块颜色直方图的算法相对于全局颜色直方图有较好的检索精度。 展开更多
关键词 HSV 颜色直方图 图像检索 量化
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基于结构量化直方图的图像检索方法 被引量:14
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作者 金莲芳 覃团发 +1 位作者 王海霞 帅勤 《中国图象图形学报》 CSCD 北大核心 2006年第2期180-185,T0001,共7页
颜色结构描述符虽然保留了颜色的结构信息,但是对8×8像素结构化元素内的颜色内容处理较粗糙,为了区分具有相同颜色结构直方图的完全不同的两幅图像,提出了一种基于结构量化直方图的检索方法,指出颜色结构直方图和全局直方图分别是... 颜色结构描述符虽然保留了颜色的结构信息,但是对8×8像素结构化元素内的颜色内容处理较粗糙,为了区分具有相同颜色结构直方图的完全不同的两幅图像,提出了一种基于结构量化直方图的检索方法,指出颜色结构直方图和全局直方图分别是结构量化直方图取量化步长为1和0时的特例。对3者在HMMD(hue-m ax-m in-d ifference)颜色空间采用不同量化维数(32,64,128,256)的2 600张花卉图库检索实验中的平均检索率(RARR)以及平均归一化修正检索等级(GANMRR)性能进行了分析,检索结果表明量化步长取0.5时的结构量化直方图的性能最优。另外还详细介绍了MPEG-7标准的颜色评价准则并以此作为评判检索结果优劣的依据。 展开更多
关键词 MPEG-7 结构量化直方图 颜色结构直方图 全局直方图 平均检索率 平均归一化修正检索等级
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基于图像信息熵与空间分布熵的彩色图像检索方法 被引量:21
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作者 孙君顶 丁振国 周利华 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 2005年第2期135-139,共5页
在分析基于颜色直方图及信息熵进行图像检索的基础上,提出了一种改进的基于信息熵的图像检索算法,该方法同以往的基于信息熵的图像检索算法相比具有更强的鲁棒性.同时,文中又提出利用空间分布熵描述图像颜色的空间分布信息,并给出了一... 在分析基于颜色直方图及信息熵进行图像检索的基础上,提出了一种改进的基于信息熵的图像检索算法,该方法同以往的基于信息熵的图像检索算法相比具有更强的鲁棒性.同时,文中又提出利用空间分布熵描述图像颜色的空间分布信息,并给出了一种基于图像信息熵与空间分布熵的彩色图像检索算法.试验结果表明,该方法效果良好,大大提高了图像检索的速度. 展开更多
关键词 空间分布 基于图像 信息熵 图像检索方法 彩色 图像检索算法 颜色直方图 分布信息 图像颜色 试验结果 分析基 鲁棒性
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基于色彩的图像数据库检索方法的研究 被引量:37
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作者 李向阳 鲁东明 潘云鹤 《计算机研究与发展》 EI CSCD 北大核心 1999年第3期359-363,共5页
文中论述了基于色彩的图像检索方法,对色彩空间的选择、色彩聚类方法、色彩直方图的距离、以及基于图像分割的色彩直方图等方面进行了详细的论述;为提高图像检索的效率和精度,采用了多阶段相似比较的方法.
关键词 图像数据库 色彩直方图 图像检索
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