EXTRACTION OF INFORMATION FROM RASTER IMAGE: A MATHEMATICAL MORPHOLOGICAL APPROACH

 

E. Anjan Rao­­1 , K. VenuGopal2


1
Department of Mathematics, Kakatiya University, Warangal, A.P., India – 506009, Email: anjanraoe@yahoo.co.in

2Department of Mathematics, Chaitanya Degree & PG College, Warangal – 506001, Email: venumaths23@yahoo.co.in

 

 

ABSTRACT

 

The extraction of specific information from raster image and creating a vector database are primary inputs in GIS modeling.  One of the methods of extraction of this information from a raster map is accomplished by digitizing the required theme manually using digitizer, but the accuracy of such a data depends on the digitizing person and precision with which the above technique is executed.  The parallax error is one of the inevitable problems in digitization, as the eye position of the person changes from time to time.  The aim of this paper is to overcome the above problem by converting the entire map as a Binary Image by scanning and extracting only the required information using Mathematical Morphological methods.

 

Key Words:    Dilation, Erosion, Open, Close, Mathematical Morphology, Binary Image.

 

 

 

 


International eJournal of Mathematics and Engineering

Volume 1, Issue 1I, Pages 150-155