Title :
Detection of and compensation for shadows in colored urban aerial images
Author :
Huang, Jianjun ; Xie, Weixin ; Tang, Liang
Author_Institution :
Shenzhen Univ., Shenzhen Univ., China
Abstract :
A new method for shadow detection in colored urban aerial images is proposed. First, a new imaging model of shadows is presented, which indicates that hue values of shadowed image areas are larger than those of these areas non-shadowed. Based on this model, a thresholding technique is employed to detect shadowed areas. After detection, the Retinex technique is applied to shadowed and non-shadowed areas individually to compensate for shadows. Experiment results show the effectiveness of the proposed method.
Keywords :
image recognition; object detection; Retinex technique; colored urban aerial images; shadow compensation; shadow detection; thresholding technique; Casting; Educational institutions; Geometry; Layout; Lighting; Object detection; Object recognition; Optical reflection; Photometry; Urban areas;
Conference_Titel :
Intelligent Control and Automation, 2004. WCICA 2004. Fifth World Congress on
Print_ISBN :
0-7803-8273-0
DOI :
10.1109/WCICA.2004.1343090
