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Image Stitching of PCBs for Reverse Engineering and Metrological Application
Simran Pal Singh Bawa
Pages - 38 - 49     |    Revised - 31-03-2016     |    Published - 30-04-2016
Volume - 10   Issue - 1    |    Publication Date - April 2016  Table of Contents
Image Mosaicking, Correspondence Point Filter, Harris Corner Detector, Rigid Transformation, Radial Distortion, Image Registration.
This paper addresses the solution towards the problem of lacking CAD data of the PCBs for repair and reverse engineering industries. In this work, concept of image mosaicking is employed. Where special distortion free optics is used to acquire images of the PCB and later theses images are stitched together to extract the pads location. Stitching Algorithm here incorporates the use of Harris corner detection for the extraction of interest points and then using popular RANSAC algorithm for the identification of the correspondence points. One of the novelty of this algorithm is the design and use of the correspondence point filter, which allows only the best match points to pass and contribute for rigid transformation matrix. Second novelty is the skew correction of the final stitched image for enhancing the accuracy.
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Mr. Simran Pal Singh Bawa
Department of Mechatronics SRM University - India