共查询到19条相似文献，搜索用时 922 毫秒
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论述了基于颜色的图像检索方法,对于颜色空间的选择、颜色直方图的距离等方面进行详细的论述,并提出了基于图像分割的颜色直方图和将主色调进行适当扩展检索等改进的检索方法. 相似文献
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介绍颜色特征提取技术中直方图的两种检索方式（主色调直方图和基于子块的主色调直方图）。提出利用直方图和正态分布法改进主色调直方图和根据图像布局特征改进基于子块的主色调直方图的思路。 相似文献
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大量图像信息的产生使得基于内容的图像检索技术成为研究热点.由于颜色特征具有稳定性和计算简单的特点,本文首先介绍了利用全局颜色直方图进行图像检索的基本思想,然后分析了它的局限性,并给出了改进的方法:特征提取采用结合空间信息的颜色一致向量方法.在特征度量时,依据所设计的评价实验,对这两种方法进行了比较,并给出了实验结果和图像检索性能的评价.实验表明,所述的图像检索方法具有较好的查全率和查准率. 相似文献
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为了解决图像检索中颜色直方图无法描述颜色空间位置信息的问题,提出了一种新的基于色彩量化的凸壳内角直方图特征.针对量化后HSV颜色空间中某一具体量化颜色值对应像素点的空间分布,首先计算包含这些像素点位置信息的凸壳,并对该凸壳的所有内角建立直方图.然后处理所有量化颜色值提取整幅图像的凸壳内角直方图特征.将该方法和一些文献中提出的方法进行的比较实验结果表明:提出的新特征可以有效地描述颜色空间位置信息,在查准率和查全率指标上均优于已有文献中的一些方法. 相似文献
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为了解决图像检索中颜色直方图无法描述颜色空间位置信息的问题,提出了一种新的基于色彩量化的凸壳内角直方图特征。针对量化后HSV颜色空间中某一具体量化颜色值对应像素点的空间分布,首先计算包含这些像素点位置信息的凸壳,并对该凸壳的所有内角建立直方图。然后处理所有量化颜色值提取整幅图像的凸壳内角直方图特征。将该方法和一些文献中提出的方法进行的比较实验结果表明：提出的新特征可以有效地描述颜色空间位置信息,在查准率和查全率指标上均优于已有文献中的一些方法。 相似文献
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彩色图像检索方法基于HSV颜色模型提取示例图像的颜色特征与图像库中图像的颜色特征时,提取不同维数的特征向量。在图像相似性度量的时候使用不同的计算公式。实验结果证明,这种颜色直方图算法速度快且与人类的视觉有着良好的一致性。 相似文献
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基于内容的图像信息检索综述 总被引：13，自引：0，他引：13
基于内容的图像检索技术，即从大量的静止或活动视频图像库中检索包含目标物体的图像（或视频片段），在高度信息化的今天，已成为内容图像库中图像信息组织和管理不可缺少的技术，本文介绍了基于内容检索技术的进展，并对其主要方法如基于颜色、形状、纹理等静止图像检索技术以及视频检索技术进行了讨论。 相似文献
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采用在HSV彩色空间的色调累积直方图和边缘直方图分别表示颜色和形状特征,进行相似性检索,并结合综合权重调整的相关反馈技术来满足用户的检索需求。实验结果表明,此算法能获得有效的检索效果。 相似文献
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针对以往肤色检查算法很少考虑亮度,仅靠色度信息检测肤色,忽略了由于不同人种和亮度差异而导致的肤色像素在颜色空间上的分布不同,本文提出了一种基于RGB-H-CbCr新颜色空间的肤色检测算法。该算法综合了肤色像素在RGB、YCbCr和HSV三种颜色空间上的分布特征,构建出RGB-H-CbCr新颜色空间肤色模型,来辨别肤色和非肤色点。文中利用Matlab分别对不同人种的肤色图像进行实验仿真,实验结果表明该方法能有效检测人体肤色,能有效提高肤色检测的正检率。 相似文献
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《Information processing & management》2019,56(4):1494-1505
This study aims to explore the relationships between Instagram user characteristics and color features of their photos. Based on the assumption that individuals who are similar in characteristics would exhibit a similar style in their social media photos, this study pays attention to color as one of the key elements of style. An online survey to 179 university students measured their Big Five personality traits, narcissism, life satisfaction, loneliness, attitude to Instagram, and gender, and their Instagram photos were analyzed in terms of colorfulness, color diversity, and color harmony. Total 25,394 photos were analyzed. Results suggest that (1) agreeableness was the most relevant user variable associated with all color features; (2) the color features of Instagram photos were different by gender; (3) neuroticism of Instagram users was negatively associated with the color harmony of their photos; (4) color diversity was negatively correlated with loneliness, and romantic loneliness in particular; (5) users’ attitude to Instagram and the color harmony of their photos were positively correlated; and (6) extraversion of Instagram users was positively correlated with the color diversity while openness was negatively correlated with the color diversity and color harmony of their photos. They reveal that the color features of Instagram photos are linked to the characteristics of their uploader. The present study contributes to the body of research on color preference and online self-presentation. It not only exemplifies how the stylometric approach can be adopted to SNS research but also presents the link between user characteristics and the features of their posts at pixel-level, including color. 相似文献
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在印染行业中,连续轧染色差的概念范围很广,有对样色差、批间色差、底面色差、左中右色差、批内色差等。本文仅就如何控制和减少左中右色差(俗称边色)和批内色差(俗称LOT色)提出见解。 相似文献
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关于最大平面图着色的探讨——希伍德的反例是4-色的 总被引：5，自引：0，他引：5
通过最大平面图和四色猜想的介绍及对最大平面图着色的分析，揭示了最大平面图着色是四色定理普遍证明的核心。应用证明五色定理的方法（肯普链），证明了希伍德的反例是4－色的，阐明了“希伍德的反例从5－色的到4－色的”具有深远的历史意义。 相似文献
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本文是基于颜色模型和纹理特征的肤色识别系统的研究。利用皮肤的纹理特征和颜色模型相结合,优化了一般的基于颜色模型的肤色识别系统的检测效果。仿真实验证明,该系统具有较好的肤色检测效果。 相似文献
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《Journal of The Franklin Institute》2022,359(8):3808-3830
Compared to the traditional single color plane based image denoising methods, the quaternion valued singular value decomposition (QSVD) exploits the relationship among different color planes. Hence, it has been applied to the color image denoising. On the other hand, compared to the non-overlapping based image denoising methods, the two dimensional real valued singular spectrum analysis (2DSSA) constructs the trajectory matrix with many elements in the matrix being overlapped. Since the 2DSSA exploits the local information within each color plane, it has also been applied to the single color plane based image denoising. However, neither these two image denoising methods can exploit the relationship among the color planes and the local information within each color plane simultaneously. Therefore, this paper proposes a two dimensional quaternion valued singular spectrum analysis (2DQSSA) based method for performing the color image denoising. Our proposed method can enjoy the advantages of both methods. However, the most critical issue for the 2DQSSA is on the selection of these 2DQSSA components. This paper finds that the optimal total number of the 2DQSSA components used for performing the reconstruction is monotonic decreasing with respect to the power of the noise in the image. Therefore, the polynomial fitting approach is proposed to model this relationship. Since the 2DQSSA based denoising method exploits the relationship among the red color plane, the green color plane and the blue color plane, the 2DQSSA based denoising method outperforms the conventional single color plane based denoising methods. Moreover, since the 2DQSSA based denoising method also exploits the local relationship within each color plane, the 2DQSSA based denoising method outperforms the non-overlapping based methods. 相似文献
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