共查询到20条相似文献,搜索用时 187 毫秒
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在研究自顶向下色彩设计过程的基础上,明确了概念色彩方案的内涵,提出了基于概念色彩方案库的自顶向下色彩设计模式。设计并建设了概念色彩方案库,实现两色、三色和四色概念色彩方案的重用,探讨了基于概念色彩方案库的设计过程。初步开发出原型系统,实现了系统与三维设计平台SolidWorks2006的集成,并在产品的色彩设计中进行了应用验证。 相似文献
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从色彩的语义空间理论出发,研究了三维语义空间的构建原理,建立了抽象语言和色彩关联的三维风格语义空间,并在此基础上构建了基于三维语义空间的色彩设计方法模型,实现了基于三维语义空间的色彩设计的具体技术路线,以辅助用户能够快速的依据语义匹配原则进行色彩设计。最后,通过产品色彩设计实例验证了该方法在色彩设计中的应用。 相似文献
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色域匹配是色彩管理的一项关键技术。通过对彩色图像的特征描述的分析,提出了一种与图像空间特征相关的自适应色域匹配算法。该算法通过将图像增强技术与传统的色域匹配算法相结合,克服了传统算法不能同时保持明度对比度对比度和彩度的缺点,有效地提高了图像的再现效果和精度。 相似文献
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面向计算机辅助工业设计的色彩设计系统 总被引:11,自引:0,他引:11
通过分析现有色彩设计工具的研究现状和不足,提出了一套较全面的产品色彩设计问题软件系统解决策略.讨论了构建计算机辅助色彩设计系统的核心技术:通过构造专用色彩空间完成特殊色彩的选取;基于Lab均匀色彩空间与规则几何框架构建色彩调和工具;构建面向行业的色彩设计知识库;应用综合模糊评价的方法进行色彩设计评价.基于上述策略和技术,开发了CAID色彩设计系统框架,并将该系统应用于机床产品设计中. 相似文献
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所有基于Plan的自动程序理解工具都采用把源码段跟标准Plan库中标准Plan相比较的方法来得到源码语义信息,从而达到程序理解的目标.以程序段的特征信息为索引项,对标准Plan库进行穷尽式快速粗匹配,以克服自下而上程序理解模式搜索强度大,实际应用性不强的弱点,达到快速粗粒度匹配的目标.方法的局限是匹配过程中存在信息遗漏,需要进一步采用模糊推理机制对潜在Plan进行相似性度量. 相似文献
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基于广义回归神经网络的数码打样色彩空间转换方法的研究 总被引:1,自引:0,他引:1
由设备无关的色彩空间CIE L*a*b*与设备相关色彩空间CMYK转换是图像输出设备特征化和色彩管理模块的关键技术。基于数码打样样张的测量数据采用广义回归网络分别建立了CMYK与CIE L*a*b*色彩空间转换的正反向模型,并分别应用色差公式进行精度检验,研究结果表明基于广义回归网络建立起来的CMYK与CIE L*a*b*色彩空间转换模型是实现色空间转换的有效方法,该模型无论从训练的简便性、训练速度、还是精度上都比BP神经网络模型有优势。 相似文献
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数据更新中要素变化检测与匹配方法 总被引:4,自引:0,他引:4
在要素类之间缺乏同名实体关联关系的情况下,通过空间分析自动识别出当前要素的同名实体及它们之间的变化信息。在查询当前要素的候选匹配集时,设计了一种基于自定义空间拓扑关系的空间查询方法,缩小了的空间查询范围并减少了查询次数,提高了空间分析的效率;在确定当前要素的同名实体时,提出了基于权重的空间要素相似性计算模型,基于该模型有效地对复杂空间关系下的要素进行了匹配,提高了匹配的准确性。 相似文献
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In this paper, a color image segmentation approach based on homogram thresholding and region merging is presented. The homogram considers both the occurrence of the gray levels and the neighboring homogeneity value among pixels. Therefore, it employs both the local and global information. Fuzzy entropy is utilized as a tool to perform homogram analysis for finding all major homogeneous regions at the first stage. Then region merging process is carried out based on color similarity among these regions to avoid oversegmentation. The proposed homogram-based approach (HOB) is compared with the histogram-based approach (HIB). The experimental results demonstrate that the HOB can find homogeneous regions more effectively than HIB does, and can solve the problem of discriminating shading in color images to some extent. 相似文献
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一种基于颜色统计聚类的医学图像检索技术 总被引:1,自引:1,他引:1
基于颜色检索的基本思想是将图像间的距离归结为其颜色直方图间的相似性度量,从而图像检索也就转化为颜色直方图的匹配。目前基于颜色检索的算法主要集中在不同颜色空间进行全局颜色聚类或融合其他可视特征(纹理,颜色空间信息等)联合检索两个方向上。该文在具体的结肠镜图像检索系统研究中,根据医学图像的特点,提出一种在HSV空间的颜色统计聚类的检索方法,取得了良好的检索效果。 相似文献
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主要研究一种面向自然图像的基于颜色特征的分类方法。通过介绍基于颜色特征的不同图像分类技术,分析基于颜色直方图与相似性度量的自然图像分类的可行性,并给出基于HSV颜色模型下的直方图相似性度量的计算方法,最终在包含628幅自然图像的图像库上进行实验。 相似文献
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Cheng-Hao YaoAuthor VitaeShu-Yuan ChenAuthor Vitae 《Pattern recognition》2003,36(4):913-929
A new method for color texture retrieval using color and edge features is proposed in this study. The proposed method unifies color and edge features rather than simply analyzing only color characteristics. First, the distributions of color and local edge patterns are used to derive a similarity measure for a pair of textures. Then, a retrieval method based on the similarity measure is proposed to retrieve texture images from a database of color textures. Finally, the similarity measure is extended to retrieve texture regions from a database of natural images. Since the proposed feature distributions can resist variations in translation, rotation and scale, our method has the ability to retrieve texture images or regions that change in translation, rotation and/or scale. The effectiveness and practicability of the proposed method have been demonstrated by various experiments. 相似文献
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以RGB颜色空间为研究对象,将RGB模型的空间立方体结构切片进行分析,提出一种新的颜色类量化方法即RGB颜色空间模型的8顶点颜色类量化方法。实验表明,该算法不仅可避免复杂的颜色空间转换过程,而且符合人眼颜色视觉的相似性判断规律,可以得到较理想的颜色识别效果。 相似文献
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This paper proposes a new approach for shot-based retrieval by optimal matching (OM), which provides an effective mechanism
for the similarity measure and ranking of shots by one-to-one matching. In the proposed approach, a weighted bipartite graph
is constructed to model the color similarity between two shots. Then OM based on Kuhn–Munkres algorithm is employed to compute
the maximum weight of a constructed bipartite graph as the shot similarity value by one-to-one matching among frames. To improve
the speed efficiency of OM, two improved algorithms are also proposed: bipartite graph construction based on subshots and
bipartite graph construction based on the same number of keyframes. Besides color similarity, motion feature is also employed
for shot similarity measure. A motion histogram is constructed for each shot, the motion similarity between two shots is then
measured by the intersection of their motion histograms. Finally, the shot similarity is based on the linear combination of
color and motion similarity. Experimental results indicate that the proposed approach achieves better performance than other
methods in terms of ranking and retrieval capability.
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Jianguo XiaoEmail: |
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The quaternion Fourier-Mellin moments for describing color images are introduced, which can be seen as the generalization of traditional Fourier-Mellin moments for gray-level images. Then, the quaternion Fourier-Mellin moment invariants are derived, which could be a useful tool in color object recognition tasks that require the similarity invariance. In addition, the problem of color image registration using quaternion Fourier-Mellin moments is discussed. The registration method can match color images differing in rotation and scaling. The advantage of our method is that it can process color image directly, without losing color information. Experimental results validate the effectiveness of the method we proposed. 相似文献