Results 1 to 10 of about 38,835 (213)

Optimization algorithm for low‐light image enhancement based on Retinex theory

open access: yesIET Image Processing, 2023
To improve the visual quality of low‐light images and discover hidden details in images, an image enhancement algorithm is proposed, which is based on a fast and robust fuzzy C‐means (FRFCM) clustering algorithm combined with Retinex theory.
Jie Yang   +5 more
doaj   +1 more source

Low-Light Image Enhancement Algorithm Integrating Retinex Illumination Estimation and Multi-Attention

open access: yesIEEE Access
To address the challenges of poor visibility, blurred textures, and distortions in low-light conditions, this paper presents an image enhancement algorithm that integrates Retinex-based illumination estimation with multi-attention mechanisms.
Yaping Jiang, Shixian Guo
doaj   +1 more source

Phase Correlation based Local Illumination-invariant Method for Multi-Tempro Remote Sensing Image Matching [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
This paper aims at image matching under significantly different illumination conditions, especially illumination angle changes, without prior knowledge of lighting conditions.
X. Wan, J. Liu, H. Yan
doaj   +1 more source

Enhancing multi-spot structured illumination microscopy with fluorescence difference [PDF]

open access: yesRoyal Society Open Science, 2018
Structured illumination microscopy is a super-resolution technique used extensively in biological research. However, this technique is limited in the maximum possible resolution increase.
Edward N. Ward   +2 more
doaj   +1 more source

Illumination invariant face recognition based on dual‐tree complex wavelet transform

open access: yesIET Computer Vision, 2015
This study presents a new dual‐tree complex wavelet transform (DT‐CWT)‐based illumination normalisation approach for face recognition under varying lighting conditions. The method consists of three steps.
Haifeng Hu
doaj   +1 more source

A method for estimating the errors in many-light rendering with supersampling

open access: yesComputational Visual Media, 2019
In many-light rendering, a variety of visual and illumination effects, including anti-aliasing, depth of field, volumetric scattering, and subsurface scattering, are combined to create a number of virtual point lights (VPLs).
Hirokazu Sakai   +3 more
doaj   +1 more source

An Efficient Illumination Estimation Algorithm for Low-Light Image Enhancement

open access: yesIEEE Access
Low-light image enhancement is of interest in many practical applications, such as low-light photography and video surveillance. Traditional methods, like histogram equalization-based methods, cannot produce good quality output consistently.
Tirui Wu, Martin Glavin, Edward Jones
doaj   +1 more source

Hybrid Eye-Tracking on a Smartphone with CNN Feature Extraction and an Infrared 3D Model

open access: yesSensors, 2020
This paper describes a low-cost, robust, and accurate remote eye-tracking system that uses an industrial prototype smartphone with integrated infrared illumination and camera.
Braiden Brousseau   +2 more
doaj   +1 more source

A Compressed Sensing Framework for Accurate and Robust Waveform Reconstruction and Phase Retrieval Using the Photonic Mixer Device

open access: yesIEEE Photonics Journal, 2015
A common way of performing phase-shift-based time-of-flight imaging combines the emission of a continuous-wave (CW) illumination signal with correlation with some reference signals at the detector array. This is the case for the well-known photonic mixer
Miguel Heredia Conde   +2 more
doaj   +1 more source

Retinex-Net mine image enhancement algorithm based on adaptive illumination estimation

open access: yesMeitan kexue jishu
The gradual progress of coal mine intelligent construction has led to an increased use of intelligent video surveillance systems in underground coal mines.
Feng TIAN, Tingting CHEN, Xiaopei LIU
doaj   +1 more source

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