Estimating the natural illumination conditions from a single outdoor image

JF Lalonde, AA Efros, SG Narasimhan - International Journal of Computer …, 2012‏ - Springer
Given a single outdoor image, we present a method for estimating the likely illumination
conditions of the scene. In particular, we compute the probability distribution over the sun …

Shadow detection in very high spatial resolution aerial images: A comparative study

KRM Adeline, M Chen, X Briottet, SK Pang… - ISPRS Journal of …, 2013‏ - Elsevier
Automatic shadow detection is a very important pre-processing step for many remote
sensing applications, particularly for images acquired with high spatial resolution. In …

Detecting ground shadows in outdoor consumer photographs

JF Lalonde, AA Efros, SG Narasimhan - … 5-11, 2010, Proceedings, Part II …, 2010‏ - Springer
Detecting shadows from images can significantly improve the performance of several vision
tasks such as object detection and tracking. Recent approaches have mainly used …

A decoupled multi-task network for shadow removal

J Liu, Q Wang, H Fan, W Li, L Qu… - IEEE Transactions on …, 2023‏ - ieeexplore.ieee.org
Shadow removal, which aims to restore the illumination in shadow regions, is challenging
due to the diversity of shadows in terms of location, intensity, shape, and size. Different from …

A shadow imaging bilinear model and three-branch residual network for shadow removal

J Liu, Q Wang, H Fan, J Tian… - IEEE Transactions on …, 2023‏ - ieeexplore.ieee.org
The current shadow removal pipeline relies on the detected shadow masks, which have
limitations for penumbras and tiny shadows, and results in an excessively long pipeline. To …

Near real-time shadow detection and removal in aerial motion imagery application

GF Silva, GB Carneiro, R Doth, LA Amaral… - ISPRS Journal of …, 2018‏ - Elsevier
This work presents a method to automatically detect and remove shadows in urban aerial
images and its application in an aerospace remote monitoring system requiring near real …

Automatic and accurate shadow detection using near-infrared information

D Rüfenacht, C Fredembach… - IEEE transactions on …, 2013‏ - ieeexplore.ieee.org
We present a method to automatically detect shadows in a fast and accurate manner by
taking advantage of the inherent sensitivity of digital camera sensors to the near-infrared …

What characterizes a shadow boundary under the sun and sky?

X Huang, G Hua, J Tumblin… - … conference on computer …, 2011‏ - ieeexplore.ieee.org
Despite decades of study, robust shadow detection remains difficult, especially within a
single color image. We describe a new approach to detect shadow boundaries in images of …

Adaptive shadow detection using a blackbody radiator model

A Makarau, R Richter, R Muller… - IEEE Transactions on …, 2011‏ - ieeexplore.ieee.org
The application potential of remotely sensed optical imagery is boosted through the increase
in spatial resolution, and new analysis, interpretation, classification, and change detection …

New spectrum ratio properties and features for shadow detection

J Tian, X Qi, L Qu, Y Tang - Pattern Recognition, 2016‏ - Elsevier
Successfully detecting shadows in still images is challenging yet has wide applications.
Shadow properties and features are very important for shadow detection and processing …