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Project Title: 
Development of Raster to Vector CONVERSION AND DVD-I TO DVD-III CONVERSION MODULES FOR GRAM++

Thematic Area:
Not applicable

Location:
Not applicable

Objective:
* To develop intelligent raster to vector conversion techniques and provide it as an integrated feature in GRAM++
* To develop import and export utilities for vector and raster formats of GRAM++

Abstract: 
Ras2Vec is an Indigenous Raster to Vector Conversion Package developed at CEERI. NRDMS Division of DST funded the project. The work was successfully completed and the package was released in a Group Monitoring Workshop held at CSRE, IIT Mumbai in July 2002. A number of copies of the Ras2Vec package were distributed to a number of users. A brief description of the package follows.
Most of the maps are available in hard copy such as paper maps or data in records. To use the data (information, resources) for online process it is very essential to feed this hard copy information to computer compatible format. The software packages that use this information like GIS mostly use vector-based maps. The easiest ways of feeding the available information to them is to scan the paper maps generating raster images and then convert them to vector based images. 
To convert raster to vector manually requires huge amount of time and labor. Some times, semi-automatic raster to vector conversion software packages are used. These are also not very efficient and need operator assistance and interaction to reliably retrieve the information from raster images.
This package converts raster images to vector images, which would need minimal operator intervention (Figure1, Figure2).

Highlights/Findings: 
* Imports of BMP and Tiff colour and grey-level image files
* Separates colour into 3 basic components
* Rotates and de-skews captured maps
* Thresholds grey level images
* Separates text and graphics 
* Skeletonises (thins) graphic vector objects
* Provides option for both Automatic/Manual vectorisation 
* Stores vector objects after polygonalisation to DXF format
* Recognizes isolated text strings using OCR engine

Date of project completion: 
31.03.2002

Total Cost of Project: 
Rs. 14.25 Lakhs (approx.)

Project Investigator: 
Dr. R. S. Shekhawat, 
Central Electronics Engg. Research Institute, 
Pilani (Rajasthan) 333031 India 
Phone: 01596-243312, 245289
email: rajveer@ceeri.res.in