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- .SH
- ntroduction
- .SH 1
- verview
- .PP
- his is to introduce a toolkit of image processing programs,
- ollectively called the
- .B ALV
- oolkit for historical reasons, written by
- .I "Phill Everson"
- <everson@uk.ac.bris.cs>
- n the Computer Science Dept. of Bristol University, United Kingdom.
- .PP
- he toolkit is designed to aid image processing work on Sun
- orkstations. It is intended to be easy to use, though not restrictive
- o experienced users, user-configurable, extensible and flexible. For
- xample the toolkit will work on both black and white and colour
- orkstations and in either case will transparently, to the user,
- isplay an image to the best of its ability on the screen.
- .PP
- he toolkit is made up of a number of tools. These include
- rograms to display an image on the screen, to display a histogram, to
- erform histogram equalisation, to threshold, to print an image on an
- pple Laserwriter, to invert an image and to convolve an image with a
- ser-supplied linear filter. Currently, there are about 30 such programs.
- .PP
- he toolkit uses the standard Sun rasterfile format to store its images
- llowing multiple depth images to be processed by the same toolkit and
- asy migration of data between packages.
- .PP
- he toolkit was initially written to fulfill a need at Bristol
- niversity for a single coherent set of tools to support basic image
- rocessing research on a variety of projects. We had found that each
- ser or group of users was writing their own copy of programs to do
- imilar things, like displaying an image on the screen, and more
- mportantly, in an enviroment were disk space is always at a premium,
- as each keeping separate copies of these often large programs.
- .PP
- sing a coherent set of tools with a consistent file format has
- ubstantially increased cross-project communication and in addition has
- rovided a higher starting point on the learning curve for novice
- un-Users/Imagers. We have found that users generally use the core
- ools as a basis and are then able to concentrate their work in their
- wn area of interest.
- .SH 1
- istory
- .PP
- he first version of the toolkit was written in June-September, 1987 by
- hill Everson at the suggestion of Barry Thomas. The kit was rewritten
- nd substantially expanded in October-November, 1987 with help from
- areth Waddell (notably for the dynamic array library) and version
- 1.0.0 was released to the comp.sources.misc newsgroup of USENET in
- February, 1988. Approximately 30 groups of users actively used the
- ystem during 1988 and in December, 1988 another rewrite was begun
- roducing version 2.0.0 ready for its release to comp.sources.unix,
- un-Spots, CVNET and Vision-Digest in mid-January, 1989.
- .SH 1
- ses at Bristol
- .PP
- o date, the toolkit has been used at Bristol for Autonomous Land
- ehicle research (ALV, obviously), Aeronautical Fluid Flow measurement,
- edical Image Processing, Sign Language Decoding, Number Plate
- ecognition and document preparation.
-