Results 31 to 40 of about 1,639,917 (250)

Adaptive colour constancy algorithm using discrete wavelet transform [PDF]

, 2012
The colours of chromatically homogeneous object surfaces measured by a sensor vary with the illuminant colour used to illuminate the objects. In contrast, colour constancy enables humans to identify the true colours of the surfaces under varying ...
Tjahjadi, Tardi, Turgay Celik, Tardi Tjahjadi, Çelik, Turgay   +3 more
core   +1 more source

Segmentation and Estimation of Spatially Varying Illumination [PDF]

IEEE Transactions on Image Processing, 2014
In this paper, we present an unsupervised method for segmenting the illuminant regions and estimating the illumination power spectrum from a single image of a scene lit by multiple light sources. Here, illuminant region segmentation is cast as a probabilistic clustering problem in the image spectral radiance space.
Gu, Lin, Huynh, Cong, Robles-Kelly, Antonio   +2 more
openaire   +3 more sources

A Curious Problem with Using the Colour Checker Dataset for Illuminant Estimation [PDF]

, 2017
In illuminant estimation, we attempt to estimate the RGB of the light. We then use this estimate on an image to correct for the light's colour bias. Illuminant estimation is an essential component of all camera reproduction pipelines.
Gehler, Peter, Gijsenij, Arjan, Finlayson, Graham, Hemrit, Ghalia, Ghalia Hemrit, Peter Gehler, Arjan Gijsenij, Graham D. Finlayson   +7 more
core   +1 more source

Quantum Estimation Methods for Quantum Illumination [PDF]

Physical Review Letters, 2017
Published ...
Sanz, M., Heras, U. las, García-Ripoll, Juan José, Solano, Enrique, Candia, R. di   +4 more
openaire   +4 more sources

Illuminant Estimation By Deep Learning [PDF]

, 2018
Computational color constancy refers to the problem of estimating the color of the scene illumination in a color image, followed by color correction of the image through a white balancing process so that the colors of the image will be viewed as if the ...
Miqdad, Hassan H.
core   +2 more sources

Spatio-Spectral Deep Color Constancy With Multi-Band NIR

IEEE Access
This paper proposes to utilize deep spatio-spectral features for color constancy, while most conventional methods focus on only spatial information of RGB images. We propose a novel color constancy method that exploits multi-band near-infrared (NIR). The
Dong-Keun Han, Jeong-Won Ha, Jong-Ok Kim
doaj   +1 more source

Illumination normalization of face image based on illuminant direction estimation and improved Retinex.

PLoS ONE, 2015
Illumination normalization of face image for face recognition and facial expression recognition is one of the most frequent and difficult problems in image processing.
Jizheng Yi, Xia Mao, Lijiang Chen, Yuli Xue, Alberto Rovetta, Catalin-Daniel Caleanu   +5 more
doaj   +1 more source

Preceding Vehicle Detection and Tracking Adaptive to Illumination Variation in Night Traffic Scenes Based on Relevance Analysis

Sensors, 2014
Preceding vehicle detection and tracking at nighttime are challenging problems due to the disturbance of other extraneous illuminant sources coexisting with the vehicle lights.
Junbin Guo, Jianqiang Wang, Xiaosong Guo, Chuanqiang Yu, Xiaoyan Sun   +4 more
doaj   +1 more source

Inferred Motion Perception of Light Sources in 3D Scenes is Color-Blind

i-Perception, 2013
In everyday scenes, the illuminant can vary spatially in chromaticity and luminance, and change over time (e.g. sunset). Such variation generates dramatic image effects too complex for any contemporary machine vision system to overcome, yet human ...
Holly E. Gerhard, Laurence T. Maloney
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source