Constructing high-dynamic-range spectral images for natural scenes

IF 1.1 4区 工程技术 Q4 OPTICS
Z. Ye, Haisong Xu, Yiming Huang, Yuemin Li, Minhang Yang
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引用次数: 0

Abstract

Abstract. The cutting-edge research in high-dynamic-range (HDR) display, such as inverse tone-mapping operators for HDR TV, HDR image quality (IQ) evaluation, and HDR image enhancement, suffer from a lack of reliable training and testing images. To address this problem, we combined the HDR imaging technique with high-accuracy spectral images to construct a first-of-its-kind HDR spectral radiance image. A framework was presented to capture multi-exposure hyperspectral images of HDR outdoor scenes and establish the HDR spectral image. By employing spectrophotometric calibration, the spectral radiance-based HDR images were created. The metadata of the spectral images provide crucial colorimetry information that was absent in the existing datasets. To validate the superiority of the proposed HDR spectral images in typical applications, the spectral sensitivity functions of a camera equipped with a multispectral-filter-array sensor was optimized, and the IQ evaluation results indicate a better adaptability over existing ones. Furthermore, the HDR image augmentation suggests that it is possible to provide a large number of RGB training images for various research objectives based on the proposed images.
构建自然场景的高动态范围光谱图像
摘要高动态范围(HDR)显示领域的前沿研究,如用于 HDR 电视的反色调映射算子、HDR 图像质量(IQ)评估和 HDR 图像增强,都存在缺乏可靠的训练和测试图像的问题。为解决这一问题,我们将 HDR 成像技术与高精度光谱图像相结合,首次构建了 HDR 光谱辐射度图像。我们提出了一个框架,用于捕捉 HDR 室外场景的多曝光高光谱图像,并建立 HDR 光谱图像。通过采用分光光度法校准,创建了基于光谱辐射度的 HDR 图像。光谱图像的元数据提供了现有数据集所缺乏的重要色度信息。为了验证所提出的 HDR 光谱图像在典型应用中的优越性,对配备多光谱滤光片阵列传感器的相机的光谱灵敏度函数进行了优化,IQ 评估结果表明其适应性优于现有的光谱灵敏度函数。此外,HDR 图像增强表明,基于所提议的图像,有可能为各种研究目标提供大量 RGB 训练图像。
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来源期刊
Optical Engineering
Optical Engineering 工程技术-光学
CiteScore
2.70
自引率
7.70%
发文量
393
审稿时长
2.6 months
期刊介绍: Optical Engineering publishes peer-reviewed papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
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