摘要
为建立图像颜色差别评价和计算的基础数据,设计了目视评价实验。用5幅典型图像分别改变明度、彩度以及同时改变明度和彩度制作了100对测试图像,通过心理物理实验对测试图像对进行了目视评价实验,对实验数据进行了统计处理,并对实验结果与图像之间的关系进行了初步分析。结果表明:相同条件下主观色差等级随图像色差改变的规律基本一致,各图像的色差感觉都与色差改变量呈对应关系;相同的图像平均色差对于不同内容的图像所引起的主观色差感觉不同,视觉对低彩度图像内容的色差感觉比较敏感;改变图像彩度时,较小和较大平均计算色差与相应的图像视觉色差变化趋势相反;单独改变明度或彩度所产生的视觉色差感觉规律不同,应对明度色差计算的公式进行修正。
Visual evaluation experiment was performed to set up the basic data of digital image color-difference evaluation and calculation.100 pairs of test images arise from five typical images by transfer functions.In the image manipulation progress,each original image was altered in three aspects: lightness,chroma respectively and lightness and chroma simultaneously.A psychophysical experiment was carried out and analysis of variance was performed to experiment data.The reliability of experiment was analyzed.The relationship between experiment results and test images was also discussed.The results showed that the visual evaluation levels for each image were consistent with the levels of objective image color change under the same conditions and the sense of image color difference was corresponding to the value of of image color change,the visual sense was more sensitive to images with light chroma.When images were altered on chroma,the trends of image calculated color difference and the corresponding visual color-difference were opposite.There were different laws when images were altered on lightness and chroma alone,and the color difference formula should be modified on lightness.
出处
《北京印刷学院学报》
2010年第2期1-5,12,共6页
Journal of Beijing Institute of Graphic Communication
基金
北京市属高等学校人才强教计划资助项目(PXM2010_014223_095557)
北京印刷学院校级重点研究项目(Ea201003)