Technique for processing imagery of plans and drawings obtained using digital camera

In practice, digital high-resolution cameras can be used to digitize plans, schemes, drawings and other similar documents. In this paper, we consider problems and limitations that arise in the processing of such documents, and propose a corresponding image processing technique. The proposed technique includes the assessment of a camera resolution, the correction of geometric distortions introduced by the camera's optical system, and the compensation of an uneven illumination.