共查询到19条相似文献,搜索用时 125 毫秒
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激光显示中匀色坐标系的建立与色差分析 总被引:2,自引:2,他引:0
针对现有激光显示采用CIE1931颜色系统不能分析色差的问题,建立了激光显示中的匀色坐标系,并对色差理论在激光显示中的应用进行了研究.分析了采用CIE1976LUV颜色坐标系分析色差的方法;并绘制了CIE1931XYZ、CIE1960UCS和CIE1976LUV三种颜色坐标系下的色度标尺图.通过对色度坐标系的转换,可以通过激光电视最终显示颜色的三基色RGB信号来比较计算机显示与激光显示的物体颜色的色差,使色差保持在人眼恰可察觉差的允许范围内.并初步分析了激光显示中相应电路的实时处理技术. 相似文献
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显示色域转换的误差影响效应 总被引:1,自引:1,他引:0
显示器的研究人员经常面对这样的问题:就是在其设计的显示系统同标准显示系统之间存在色域偏差,因而,他们引入了色域转换的方法来克服这一问题。为了能准确表示一个显示系统所表现的颜色,CIE色度图常常用来描述该显示系统所复现的颜色坐标范围。在不同的显示系统中,由于其基色的特性不同,从而带来其显示色域的不同。目前,因为CRT广泛的应用和许多历史原因,使得CRT被公认为标准的显示系统,而其显示色域也自然成为准色域。这样产生的一个后果就是,许多显示系统的设计人员不得不放弃自有显示系统的色域,并设法将其转换到标准色域。由于多种因素的影响,转换后的色域往往仍然存在着较大的偏差。本文在色域的三维模型上对转换误差进行分析,评估色域转换的质量;同时,在分析这种偏差的基础上,详细论述了色域量化误差影响效应。 相似文献
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基于颜色再现的多基色系统的研究 总被引:3,自引:0,他引:3
本文采用模拟计算方法研究多基色系统对颜色再现的影响,以便实现对于CRT色域范围的最佳扩展。分别采用伪逆矩阵和矩阵转换的方法实现颜色信号到多基色系统驱动信号的转换。模拟结果显示,后者所得结果更为可靠。基于矩阵转换的方法,分别模拟了不同多基色系统的颜色再现情况。 相似文献
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Psychophysical evaluation of gamut mapping techniques using simplerendered images and artificial gamut boundaries 总被引:4,自引:0,他引:4
Using a paired comparison paradigm, various gamut mapping algorithms were evaluated using simple rendered images and artificial gamut boundaries. The test images consisted of simple rendered spheres floating in front of a gray background. Using CIELAB as our device-independent color space, cut-off values for lightness and chroma, based on the statistics of the images, were chosen to reduce the gamuts for the test images. The gamut mapping algorithms consisted of combinations of clipping and mapping the original gamut in linear piecewise segments. Complete color space compression in RGB and CIELAB was also tested. Each of the colored originals (R,G,B,C,M,Y, and Skin) were mapped separately in lightness and chroma. In addition, each algorithm was implemented with saturation (C(*)/L(*)) allowed to vary or retain the same values as in the original image. Pairs of test images with reduced color gamuts were presented to twenty subjects along with the original image. For each pair the subjects chose the test image that better reproduced the original. Rank orders and interval scales of algorithm performance with confidence limits were then derived. Clipping all out-of-gamut colors was the best method for mapping chroma. For lightness mapping at low lightness levels and high lightness levels particular gamut mapping algorithms consistently produced images chosen as most like the original. The choice of device-independent color space may also influence which gamut mapping algorithms are best. 相似文献
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《Display Technology, Journal of》2008,4(3):314-318
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Yuqing Fan Chunhuan Zhang Yuxiang Du Chan Qiao Kang Wang Yue Hou Jiannian Yao Yong Sheng Zhao 《Advanced functional materials》2021,31(28):2103031
Large-scale red, green, and blue (RGB) microlaser arrays capable of exhibiting full-color laser emissions are urgently desired for high-performance flat-panel laser displays. With excellent solution processability and optoelectronic properties, organic materials are promising candidates for full-color microlasers; however, the heterogeneous integration of full-color microlasers remains a challenge due to their poor solution stability to withstand multistage solution processing. Here, a robust in situ cross-linking strategy is proposed to enable orthogonal processing of organic microlasers to heterogeneously integrate large-scale full-color organic microlaser arrays. The organic microlasers with controlled physical dimensions and spatial locations are fabricated with an electron beam (e-beam) induced in situ polymerization reaction. Profiting from enhanced orthogonality of microlasers, large-scale pixelated RGB microlaser arrays are monolithically integrated through successive e-beam patterning processes. Laser emissions in the RGB microlaser pixels cover a color gamut 41% larger than the standard RGB space, with which flexible full-color organic laser display patterns with a resolution of 254 dpi on a centimeter scale is obtained. The scalable heterogeneous integration platform reported in this work will pave a new avenue for the efficient construction of large-scale high-performance organic integrated optoelectronic devices. 相似文献
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数字电视显示器的宽色域技术是显示领域的发展方向.近年来,宽色域显示器件和显示方式有长足进步,以发光二极管为背光源的液晶显示器等已商品化.采用三维色域测量方法,可以比传统测量方法更加准确地衡量产品的色域.提出了利用显示器宽色域色块校准方法,解决三维色域测量的准确性问题. 相似文献
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针对CIELAB空间色调非恒常影响色域匹配及色差计算准确度问题,研究了色调恒常校正方法,建立了一种新的校正空间tLAB,并用其替代CIELAB空间实施色彩管理.首先,以孟塞尔空间为标准,分析了CIELAB空间的色调非恒常性.然后,利用孟塞尔新标数据对CIELAB空间实施色调校正,构建了色调恒常的颜色空间tLAB;借助三维查找表(3D-LUT)描述CIELAB和tLAB之间的非线性关系,提出了不增加时空代价的色彩管理工程实现方案.最后,给出了利用tLAB空间进行色域匹配的结果,以及新的色差评价指标体系.实验表明,利用tLAB空间进行色域匹配的效果明显优于传统方法,且用其替代CIELAB空间实施色彩管理具有很好的实时性和普适性. 相似文献
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针对人脸三维重建,基于RGB 激光扫描系统,提出了一种彩色三维重建方法。首先,以直接标定的方法,建立了数码相机采样图片的像素坐标系与世界坐标系的映射关系;利用相机拍摄的三色激光照明下的标准色板图像,标定了数码相机对三原色的感光曲线,即建立了相机三原色记录值与标准值之间的关系。然后,以人脸为目标,提出了从获取扫描数据到进行三维重建的完整方法。最后,经迭代法匹配,输出为通用的三维模型格式,实现了人脸在毫米量级上的三维重建。该方法简化了标定过程,算法简单,系统造价低,可推广至各种物件的三维扫描重建。 相似文献
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在文献[1]的基础上提出改进,采用能够更准确描述感知颜色联系的HSV颜色空间代替传统的RGB颜色空间;对图像进行空间子图像划分,结合颜色特征与空间信息进行检索;通过提取图像颜色的上均值、下均值,获取多重Bitmap特征,扩展比较图像内容差异时所利用的信息范围.实验结果表明,提出的算法比文献[1]算法的检索性能有明显的改进. 相似文献