User-assisted image shadow removal

Appearance Harmonization for Single Image Shadow Removal

Shadow removal is a challenging problem and previous approaches often produce de-shadowed regions that are visually inconsistent with the rest of the image. We propose an automatic shadow region harmonization approach that makes the appearance of a de-shadowed region (produced using any previous technique) compatible with the rest of the image. We use a shadow-guided patch-based image synthesis...

Shadow detection and removal from a single image

Integrated shadow removal based on photogrammetry and image analysis

Y. LI*{, P. GONG{§ and T. SASAGAWA" {International Institute for Earth System Science, Nanjing University, Nanjing, Jiangsu, 210093, PRC {Institute of Remote Sensing Applications, Chinese Academy of Sciences, 100101, Beijing, PRC §Center for Assessment and Monitoring of Forest and Environmental Resources (CAMFER), UC Berkeley, 151 Hilgard Hall, Berkeley, CA, 94720-3110, USA "PASCO Corporation, ...

Shadow removal from image of stained glass windows

Shadows may be formed on stained glass windows by structural bars supporting the leaded panels, or by external protective wire grilles, or by masonry, such as mullions or buttresses, or external objects, such as trees. The eye tends to ‘‘discount’’ such shadow formations when viewing the actual windows even though in the photographic images they are very clearly visible. This article introduces...

Single Image Shadow Removal via Neighbor-Based Region Relighting

In this paper we present a novel method for shadow removal in single images. For each shadow region we use a trained classifier to identify a neighboring lit region of the same material. Given a pair of lit-shadow regions we perform a region relighting transformation based on histogram matching of luminance values between the shadow region and the lit region. Then, we adjust the CIELAB a and b ...