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Optimization Method of Loop Detection Based on Shadow Compensation
2020 The 4th International Conference on Video and Image Processing, 2020In visual simultaneous localization and mapping, loop detection is sometimes affected by illumination and other factors, which may lead to false negative or false positive errors. In order to improve the accuracy of loop detection and reduce the influence of shadow, this paper studies the image acquired under different illumination in the same place ...
Songqing Hou, Bo Liu
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Shadow determination and compensation for face recognition
International Journal of Machine Learning and Cybernetics, 2013Illumination variation that occurs on face images will significantly influence the performance of the recognition. Based on the low-dimensional intrinsic of face images, we design a novel two-step shadow compensation method for face recognition. Three indexes are proposed and employed to distinguish the shaded-images.
Yi Li, Xiaodong Liu 0001, Zhijun Gao
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Shadow compensation and illumination normalization of face image
Machine Vision and Applications, 2013This study proposes a novel shadow compensation and illumination normalization method under uncontrolled light conditions. First, we decompose the face image into two images based on the Lambertian theory, which corresponds to the large- and small-scale features, respectively.
Haiyang Wang +2 more
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Shadow Compensation for Aerial Images Using Statistical Color Tuning
2022 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), 2022Shahbe Mat-Desa +1 more
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Environmental compensation in the shadow of extractivism
2021In the context of profound socio-ecological change that has come to define the present Anthropocene moment, a suite of voluntary and state-orchestrated environmental policies known as biodiversity offsetting have become increasingly widespread during the last decade.
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Shadow Segmentation and Compensation in High Resolution Satellite Images
IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008In high spatial resolution satellite images, shadows are usually cast by elevated objects such as buildings, bridges, and towers, especially in urban region. Shadows may cause loss of feature information, false color tone and shape distortion of objects, which seriously affect the quality of images.
Haijian Ma, Qiming Qin, Xinyi Shen
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Shadowing effect modeling and compensation for EUV lithography
SPIE Proceedings, 2011Extreme ultraviolet (EUV) lithography is one of the leading technologies for 16nm and smaller node device patterning. One patterning issue intrinsic to EUV lithography is the shadowing effect due to oblique illumination at the mask and mask absorber thickness. This effect can cause CD errors up to a few nanometers, consequently needs to be accounted
Hua Song +4 more
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Atmospheric and shadow compensation of hyperspectral imagery using voxelized LiDAR
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015Hyperspectral images have become more prevalent and accessible in recent years. Many of the processes which take advantage of hyperspectral imagery rely on the generation of a reflectance product in order to compare with spectral signatures, and numerous methods have been developed to perform this process.
Shea Hagstrom, Joshua B. Broadwater
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Shadow Compensation Using Fourier Analysis With Application to Face Recognition
IEEE Signal Processing Letters, 2011Shadows that occur on face images due to illumination variation can change the appearance of a face and degrade face recognition performance. In this paper, we propose a new shadow compensation method based on the Fourier analysis for handling illumination variation.
Sang-Il Choi, Gu-Min Jeong
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Illumination Compensation for Wave Equation Migration Shadow
Chinese Journal of Geophysics, 2007AbstractDue to the effects of complicated subsurface structures and seismic acquisition system, the seismic wave illumination to some subsurface targets may be inhomogeneous, so the seismic acquisition system can not effectively acquire the reflected information from these targets, and migrated images on these targets will have some migration shadows ...
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