Development of Raster to Vector CONVERSION AND DVD-I TO DVD-III CONVERSION MODULES FOR GRAM++
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++
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).
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:
Total Cost of Project:
Rs. 14.25 Lakhs (approx.)
Dr. R. S. Shekhawat,
Central Electronics Engg. Research Institute,
Pilani (Rajasthan) – 333031 India
Phone: 01596-243312, 245289