Simultaneous estimation of super-resolved depth map and intensity field using photometric cue
Computer Vision and Image Understanding
Camera calibration and light source orientation from solar shadows
Computer Vision and Image Understanding
A Simple Shadow Based Method for Camera Calibration
ICIAR '08 Proceedings of the 5th international conference on Image Analysis and Recognition
Estimating Geo-temporal Location of Stationary Cameras Using Shadow Trajectories
ECCV '08 Proceedings of the 10th European Conference on Computer Vision: Part I
Simultaneous estimation of super-resolved depth map and intensity field using photometric cue
Computer Vision and Image Understanding
GPS coordinates estimation and camera calibration from solar shadows
Computer Vision and Image Understanding
Shadow segmentation using time-of-flight cameras
ICIAP'11 Proceedings of the 16th international conference on Image analysis and processing: Part I
Camera and light calibration from reflections on a sphere
Computer Vision and Image Understanding
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In this paper, we describe how camera parameters and light source orientation can be recovered from two perspective views of a scene given only two vertical lines and their cast shadows. Compared to the traditional calibration methods that involve images of some precisely machined calibration pattern, our method uses new calibration objects: the vertical objects and their parallel shadow lines, which are common in natural environments. In addition to the benefit of increasing accessibility of the calibration objects, the proposed method is also especially useful in cases where only limited information is available. To demonstrate the accuracy and the applications of the proposed algorithm, we present results on both synthetic and real images.