High resolution satellite images may contain shadows due to the limitations of imaging circumstances and presence of tall-standing objects. These shadows cause problems in the exploitation of such images. This paper proposes a complete processing chain to mitigate these shadow effects. This processing chain has two parts. A shadow detection part bases on image imposing and a pixel restoration p...

Efficient Run-time Monitoring Using Shadow Processing Harish Patil* and Charles Fischer University of Wisconsin —Madison** Abstract General purpose multiprocessors are becoming increasingly common. We propose using pairs of processors, one running an ordinary application program and the other monitoring the application’s execution. We call the processor doing the monitoring a “shadow processor,...

in a general classification, the economy of any country is divided into two parts of official and invisible economies. invisible activities drop outside the scope of the law and official economy and strongly affect socioeconomic development and the formal sector of all countries.these activities which are known under various titles including the shadow economy are influenced by various factors....

For some computer vision tasks, the presence of shadows in images can cause problems. For example, object tracks can be lost as an object crosses over a shadow boundary. Recently, it has been shown that it is possible to remove shadows from images. Assuming that the location of the shadows are known, shadow-free images are obtained in three steps. First, the image is differentiated. Second, the...

We propose two tampered image detection methods based on consistency of shadow. The first method is based on texture consistency of shadow for the first kind of splicing image, in which the shadow as well as main body is copied and pasted from another image. The suspicious region including shadow and nonshadow is first selected. Then texture features of the shadow region and the nonshadow regio...

In this paper, we propose an adaptive and accurate moving cast shadow detection method employing online sub-scene shadow modeling and object inner-edges analysis for applications of static-camera video surveillance. To describe shadow appearance more accurately, the proposed method builds adaptive online shadow models for sub-scenes with different conditions of irradiance and reflectance. The o...

1077-3142/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.cviu.2010.04.003 * Corresponding author. E-mail address: [email protected] (L. Wu The position of a world point’s solar shadow depends on its geographical location, the geometrical relationship between the orientation of the sunshine and the ground plane where the shadow casts. This paper investigates the property of solar s...

In this paper we present a real-time global illumination approach for illuminating scenes containing huge point clouds. Our GI approach is based upon the distribution of Virtual Point Lights (VPLs) in the scene, which are then used for the indirect illumination of the scene geometry, using Imperfect Shadow Maps for visibility calculation of the VPLs. We are able to render multiple indirect ligh...