Jafar Shahsavari - Isfahan University of Technology
Behzad Nazari
Niloofar Gheissari

In many applications in image processing, we need to use a camera and projector together. The first step in these applications is calibrating the projector and the camera. In ourapplication (to make a system to visualize body veins), we need to calibrate them on a nonplanar surface. Furthermore, it ispossible that bothersome factors, noise, low contrast and nonuniform illumination to be present in camera-taken images. This makes corner extraction a non trivial task. In this paper acamera-projector calibration method is presented that is robust to the above factors. Then the corresponding corners between theprojector image and camera image are used to find the transformation function between the two images. Since thesurface of interest (the body skin) is not planar, nonplanar or local transformations are needed in this application. Finally some quantitative measurement is applied to evaluate the performance of the transformation function

Camera-projector calibration; camera calibration; calibration; vein visualizing; vein contrast enhancement