**EXTRACTION OF INFORMATION FROM RASTER IMAGE: A MATHEMATICAL
MORPHOLOGICAL APPROACH**

**E. Anjan Rao ^{1}
, K. VenuGopal^{2}**

^{
1 }Department of Mathematics, ^{}

^{2}Department of
Mathematics,

**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