Shadows and Light
نویسنده
چکیده
in the evening winter is creme among shadows, belting mysteriously to grass and thinly-clad trees...
منابع مشابه
A Real-Time Soft Shadow Volume Algorithm
Rendering of shadows is a very important ingredient in three-dimensional graphics since they increase the level of realism and provide cues to spatial relationships. Area or volumetric light sources give rise to so called soft shadows, i.e., there is a smooth transition from no shadow to full shadow. For hard shadows, which are generated by point light sources, the transition is abrupt. Since a...
متن کاملDetection and Tracking of Moving
This paper presents a method for detection and tracking of moving cast shadows on a dominating scene background in a monocular video sequence. The method assumes moving shadows on a dominant smooth shaped background. The shadow causing light sources are assumed to be strong enough to cause visible temporal frame diierences by moving cast shadows. These diierences are detected and classiied into...
متن کاملSoft Shadow Maps for Area Light by Area Approximation
Shadow mapping has been a popular way of generating shadows in real-time applications, but it is still incapable of generating realistic real time soft shadows for area light. There is an algorithm for generating soft shadows for linear light with few samples, but the algorithm is not suitable for area light. In this article, the author presents a modified method to the shadow mapping algorithm...
متن کاملRemoving car shadows in video images using entropy and Euclidean distance features
Detecting car motion in video frames is one of the key subjects in computer vision society. In recent years, different approaches have been proposed to address this issue. One of the main challenges of developed image processing systems for car detection is their shadows. Car shadows change the appearance of them in a way that they might seem stitched to other neighboring cars. This study aims ...
متن کاملInteractive Animation of Soft Shadows
Shadows are of great importance to computer graphics, especially for interactive animation due to the visual cues which they provide. Most research in the field of dynamic shadowing has focussed on shadows from point light sources, since they are much easier to compute than those from area light sources. This means that such shadows have sharp boundaries, and so often appear to be unrealistic. ...
متن کاملComputer Vision and Agricultural Robotics for Disease Control: The Potato Operation
camera light 1 light 2 potato sprout shadows due to light source 1 shadows due to light source 2 25 Fig 9; Lefebvre et al.
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