Results 21 to 30 of about 2,939,416 (298)

Shadow detection from images using fuzzy logic and PCPerturNet

open access: yesIET Image Processing, 2021
Shadow detection is a challenging and essential task for interpreting the scene. Regardless of encouraging findings from current Deep Learning (DL) approaches used for shadow detection, the methods are also dealing with inconsistent situations where the ...
Jyotismita Chaki
doaj   +1 more source

Moving Shadow Detection in Video Using Cepstrum [PDF]

open access: yes, 2010
Moving shadows constitute problems in various applications such as image segmentation and object tracking. The main cause of these problems is the misclassification of the shadow pixels as target pixels.
Cogun, Fuat, Cetin, Ahmet Enis
core   +1 more source

Insignificant shadow detection for video segmentation [PDF]

open access: yes, 2005
To prevent moving cast shadows from being misunderstood as part of moving objects in change detection based video segmentation, this paper proposes a novel approach to the cast shadow detection based on the edge and region information in multiple frames.
Tang, X.   +14 more
core   +1 more source

Cloud and Cloud Shadow Detection of GF-1 Images Based on the Swin-UNet Method

open access: yesAtmosphere, 2023
Cloud and cloud shadow detection in remote sensing images is an important preprocessing technique for quantitative analysis and large-scale mapping. To solve the problems of cloud and cloud shadow detection based on Convolutional Neural Network models ...
Yuhao Tan   +7 more
doaj   +1 more source

FFSDF: An improved fast face shadow detection framework based on channel spatial attention enhancement

open access: yesJournal of King Saud University: Computer and Information Sciences, 2023
Recent shadow detectors excel on simple datasets but encounter difficulties with facial shadow images under complex lighting due to the lack of annotated shadow masks, varying shadow sizes, and imbalances between the target and background.
Hongliang Zhou, Jizheng Yi
doaj   +1 more source

A NEW CLOUD SHADOW DETECTION ALGORITHM BASED ON PRIOR LAND TYPE DATABASE SUPPORT [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Cloud shadow detection is one of the basic step for remote sensing image processing. The threshold method is commonly used currently because of its easy implementation and good accuracy. Aiming at the problems that common threshold settings are difficult
X. Y. Zhou, L. Sun
doaj   +1 more source

Adaptive Unsupervised-Shadow-Detection Approach for Remote-Sensing Image Based on Multichannel Features

open access: yesRemote Sensing, 2022
Shadow detection is an essential research topic in the remote-sensing domain, as the presence of shadow causes the loss of ground-object information in real areas. It is hard to define specific threshold values for the identification of shadow areas with
Zhanjun He   +4 more
doaj   +1 more source

Terrestrial Hyperspectral Image Shadow Restoration through Lidar Fusion

open access: yesRemote Sensing, 2017
Acquisition of hyperspectral imagery (HSI) from cameras mounted on terrestrial platforms is a relatively recent development that enables spectral analysis of dominantly vertical structures.
Preston Hartzell   +2 more
doaj   +1 more source

ORTHOPHOTO SHADOW DETECTION METHOD UNDER ARTIFICIAL SHADOW [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Shadows are ubiquitous in high-resolution images, especially in urban regions where there are more serious shadow occlusions. In order to improve the detection effect of shadows, this paper analyzes the characteristics and properties of shadows in ...
W. X. Zhang   +6 more
doaj   +1 more source

Evaluation of shadow features

open access: yesIET Computer Vision, 2018
Shadow features such as colour ratio, texture, and chromaticity have proved to be quite effective in shadow detection. Many shadow detection methods have been proposed on the basis of different features.
Liangqiong Qu   +4 more
doaj   +1 more source

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