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Radiometric calibration of low light imager based on specialized light sources
Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 2021Due to the advances in the low light imagers and high quality of the related night time data products, some related applications such as fishery activities, fog detection, gravity wave and internal solitary wave parameters retrieval, armed conflicts and disasters have been greatly promoted.
Shuo Ma +3 more
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Retinexformer: One-stage Retinex-based Transformer for Low-light Image Enhancement
IEEE International Conference on Computer Vision, 2023When enhancing low-light images, many deep learning algorithms are based on the Retinex theory. However, the Retinex model does not consider the corruptions hidden in the dark or introduced by the light-up process.
Yuanhao Cai +5 more
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Multiple exposure images based traffic light recognition
2014 IEEE Intelligent Vehicles Symposium Proceedings, 2014This paper proposes a multiple exposure images based traffic light recognition method. For traffic light recognition, color segmentation is widely used to detect traffic light signals; however, the color in an image is easily affected by various illuminations and leads to incorrect recognition results.
Chulhoon Jang +4 more
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Accurate image based re-lighting through optimization
ACM SIGGRAPH 2002 conference abstracts and applications, 2002Image-based relighting represents a class of techniques that apply new lighting conditions to a scene, given a set of basis images. In this sketch we present a relighting technique that, for a single viewpoint, accurately captures the reflectance field of objects, without restrictions on their geometrical complexity or material properties.
Pieter Peers, Philip Dutré
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ACM SIGGRAPH 2007 posters, 2007
When compositing computer generated imagery into photographed scenes, image based lighting (IBL) [Debevec 1998] is used so that synthetic and real objects are consistently illuminated. Traditional IBL takes light captured from a single point in space however light varies spatially in many scenes. Unger et al. [2003] captured a light field for lighting,
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When compositing computer generated imagery into photographed scenes, image based lighting (IBL) [Debevec 1998] is used so that synthetic and real objects are consistently illuminated. Traditional IBL takes light captured from a single point in space however light varies spatially in many scenes. Unger et al. [2003] captured a light field for lighting,
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Thermal light ghost imaging based on morphology
Optics Communications, 2016Abstract The quality of thermal light ghost imaging could be degraded by undersampling noise. This kind of noise is generated because of finite sampling, which could reduce the signal-to-noise ratio (SNR) of ghost imaging and submerge object information. In order to reduce the undersampling noise, we propose a thermal light ghost imaging scheme based
Zhipeng Chen, Jianhong Shi, Guihua Zeng
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Image-based Light Modification
2020Designers translate their ideas into images via visualization tools. Most of these tools provide some level of editing capabilities. Although these tools have very powerful and comprehensive capability in editing, they require users to have a strategy before using and decide the combination of commands he/she needs to apply.
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Low-Illumination Image Enhancement Algorithm Based on a Physical Lighting Model
IEEE transactions on circuits and systems for video technology (Print), 2019Low-illumination images are usually taken in non-uniform environmental light, such as extremely dark or bright light or artificial light. The enhancement results achieved by existing techniques are prone to halo artifacts, color unnaturalness, and ...
Shunyuan Yu, Hong Zhu
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Ultrafast image-based dynamic light scattering for nanoparticle sizing
Review of Scientific Instruments, 2015An ultrafast sizing method for nanoparticles is proposed, called as UIDLS (Ultrafast Image-based Dynamic Light Scattering). This method makes use of the intensity fluctuation of scattered light from nanoparticles in Brownian motion, which is similar to the conventional DLS method. The difference in the experimental system is that the scattered light by
Wu, Zhou +3 more
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Improving High Dynamic Range Image Based Light Measurement
2020 IEEE International Conference on Systems, Man, and Cybernetics (SMC), 2020This study proposes a fast high dynamic range imaging (HDRI) technique for light measurement to shorten the long capturing time of current camera-aided computational photography widely used in lighting practice. In comparison with the conventional meter measurement, HDRI-assisted lighting measurement is a remote, efficient, affordable yet time ...
Hankun Li, Hongyi Cai, Guanghui Wang
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