Detecting buildings in aerial images
Computer Vision, Graphics, and Image Processing
Use of shadows for extracting buildings in aerial images
Computer Vision, Graphics, and Image Processing
Perceiving Spatial Relationships in Computer-Generated Images
IEEE Computer Graphics and Applications
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part III
Shadow stereo -- locating object boundaries using shadows
AAAI'87 Proceedings of the sixth National conference on Artificial intelligence - Volume 2
The effects of cast shadows and stereopsis on performing computer-generated spatial tasks
IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Endoscopic navigation for minimally invasive suturing
MICCAI'07 Proceedings of the 10th international conference on Medical image computing and computer-assisted intervention
The effect of depth perception on visual-motor compensation in minimal invasive surgery
Miar'06 Proceedings of the Third international conference on Medical Imaging and Augmented Reality
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Depth estimation is one of the most fundamental challenges for performing minimally invasive surgical (MIS) procedures. The requirement of accurate 3D instrument navigation using limited visual depth cues makes such tasks even more difficult. With the constant expectation of improving safety for MIS, there is a growing requirement for overcoming such constraints during MIS. We present in this paper a method of improving the surgeon's perception of depth by introducing an "invisible shadow" in the operative field cast by an endoscopic instrument. Although, the shadow is invisible to human perception, it can be digitally detected, enhanced and re-displayed. Initial results from our study suggest that this method improves depth perception especially when the endoscopic instrument is in close proximity to the surface. Experiment results have shown that the method could potentially be used as an instrument navigation aid allowing accurate maneuvering of the instruments whilst minimizing tissue trauma.