Geometric computation for machine vision
Geometric computation for machine vision
Three-dimensional computer vision: a geometric viewpoint
Three-dimensional computer vision: a geometric viewpoint
Machine vision
Multiple view geometry in computer vision
Multiple view geometry in computer vision
The Geometry of Multiple Images: The Laws That Govern The Formation of Images of A Scene and Some of Their Applications
Digital Image Processing
Automatic creation of indexed presentations from classroom lectures
Proceedings of the 13th annual conference on Innovation and technology in computer science education
Improving the Border Detection and Image Enhancement Algorithms in Tableau
ICIAR '08 Proceedings of the 5th international conference on Image Analysis and Recognition
Mobile document scanning and copying
Proceedings of the international conference on Multimedia
Mobile vision-based sketch recognition with SPARK
Proceedings of the International Symposium on Sketch-Based Interfaces and Modeling
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A whiteboard can be an easy tool for collaboration such as brainstorming, and is widely used, but the content on a whiteboard is hard to archive and share. While digital cameras can be used to capture whiteboard content, the images are usually taken from an angle, resulting in undesired perspective distortion. They may contain other distracting regions such as walls and shadows. The visual quality of those images is usually poor. This paper describes a system that automatically locates the boundary of a whiteboard, crops out the whiteboard region, rectifies it into a rectangle, and corrects the color to make the whiteboard completely white. In case a single image is not enough (e.g., large whiteboard and low-resolution camera), we have developed a robust feature-based technique to automatically stitch multiple overlapping images. The system has been tested extensively, and very good results have been obtained.