1.燕山大学 电气工程学院,河北 秦皇岛 066004
2.河北省数字影像装备与数字显示技术重点实验室,河北 秦皇岛 066004
3.秦皇岛视听机械研究所,河北 秦皇岛 066004
[ "侯培国(1968-),男,山东临沂人,教授,博士生导师,1990年于东北重型机械学院获得学士学位,1993年于燕山大学获得工学硕士学位,2003年于燕山大学获得工学博士学位,现为燕山大学工程训练中心党委书记、工程训练中心主任,主要从事光电检测、智能传感器等方面的研究。E-mail: pghou@ysu.edu.cn" ]
[ "张 铮(1997-),女,河北承德人,硕士研究生,2019年于燕山大学电气工程学院获得学士学位,主要从事图像处理与计算机视觉的研究。E-mail: 735089139@qq.com" ]
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侯培国, 张铮, 宋涛, 等. Lab的多投影颜色校正及亮度融合技术[J]. 光学精密工程, 2021,29(7):1667-1677.
Pei-guo HOU, Zheng ZHANG, Tao SONG, et al. Multi-projection color correction and brightness fusion technology based on Lab[J]. Optics and Precision Engineering, 2021,29(7):1667-1677.
侯培国, 张铮, 宋涛, 等. Lab的多投影颜色校正及亮度融合技术[J]. 光学精密工程, 2021,29(7):1667-1677. DOI: 10.37188/OPE.20212907.1667.
Pei-guo HOU, Zheng ZHANG, Tao SONG, et al. Multi-projection color correction and brightness fusion technology based on Lab[J]. Optics and Precision Engineering, 2021,29(7):1667-1677. DOI: 10.37188/OPE.20212907.1667.
传统的多投影颜色校正和亮度融合在RGB颜色空间下进行,存在校正过程中亮度和色度相互干扰的问题。针对上述问题,提出一种基于Lab颜色空间的颜色校正和亮度融合方法。将亮度与色度单独提取出来,用B样条曲线模型建立起各投影仪原图像与投影显示画面的亮度、色度转换关系,以消除各投影仪投影显示画面之间的颜色差异,并采用融合B样条曲线的伽玛校正对画面重叠区域的亮度进行调节。实验结果表明,相对于RGB颜色空间,在Lab空间进行颜色校正使两个投影显示画面的颜色强度差异在Lab三通道分别减少了4.14,2.41,2.44;相对于RGB颜色空间的伽马校正,在Lab空间将伽马校正与B样条曲线融合进行亮度调节使投影显示画面重叠区域与非重叠区域的颜色强度差异在Lab三通道分别减少了6.12,4.64,3.47。基于Lab的多投影颜色校正及亮度融合技术可对投影显示画面亮度与色度进行更准确的校正,并且给予不同颜色强度对应的伽马系数。
The traditional multi-projection color correction and brightness fusion are performed in the RGB color space; the brightness and chroma interfere with each other in the correction process, which is a major concern. To solve this problem, a color correction and brightness fusion method based on the Lab color space is proposed. The brightness and chroma are extracted separately, and the brightness and chroma conversion relationship between the original images of each projector and the projected display screen is established using the B-spline curve model to eliminate the color difference between the display screen of each projector, and the brightness of the overlapping area of the screen is adjusted using the gamma correction fused with the B-spline curve. The experimental results show that, compared with the RGB color space, color correction in the Lab color space reduces the difference in color intensity of the two projection display images by 4.14, 2.41, and 2.44 in Lab three channels. Compared with gamma correction in the RGB color space, gamma correction and B-spline curve are fused to adjust brightness in Lab space, which reduces the difference in color intensity between the overlapping and non-overlapping areas by 6.12, 4.64, and 3.47 in Lab three channels. The multi-projection color correction and brightness fusion technology based on Lab can correct the brightness and chroma of the projected display image more accurately, and obtain the gamma coefficient corresponding to different color intensities.
Lab颜色空间颜色校正亮度融合伽马校正B样条曲线
Lab color spacecolor correctionbrightness fusiongamma correctionB spline curve
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