Perspective Correction Methods for Camera-Based Document Analysis
Lakshmipathy Jagannathan, C. V. Jawahar · 2005
In this paper, we describe a spectrum of algorithms for rectification of document images for camera-based analysis and recognition. Clues like document boundaries, page layout information, organisation of text and graphics components, apriori knowledge of the script or selected symbols etc. are effectively used for removing the perspective effect and computing the frontal view needed for a typical document image analysis algorithm. Appropriate results from projective geometry of planar surfaces are exploited in