Prototyping real-time vision systems: An experiment in DSL design

Alastair Reid, John Peterson, Greg Hager, Paul Hudak

Research output: Contribution to journalConference articlepeer-review

17 Scopus citations


We describe the enhancement of XVision, a large library of C++ code for real-time vision processing, into FVision (pronounced `fission'), a fully-featured domain-specific language embedded in Haskell. The resulting prototype system substantiates the claims of increased modularity, effective code reuse, and rapid prototyping that characterize the DSL approach to system design. It also illustrates the need for judicious interface design: relegating computationally expensive tasks to XVision (pre-existing C++ components), and leaving modular compositional tasks to FVision (Haskell). At the same time, our experience demonstrates how Haskell's advanced language features (specifically parametric polymorphism, lazy evaluation, higher order functions and automatic storage reclamation) permit a rapid DSL design that is itself highly modular and easily modified. Overall, the resulting hybrid system exceeded our expectations: visual tracking programs continue to spend most of their time executing low level image-processing code, while Haskell's advanced features allow us to quickly develop and test small prototype systems within a matter of a few days and to develop realistic applications within a few weeks.

Original languageEnglish (US)
Pages (from-to)484-493
Number of pages10
JournalProceedings - International Conference on Software Engineering
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 International Conference on Software Engineering - Los Angeles, CA, USA
Duration: May 16 1999May 22 1999

ASJC Scopus subject areas

  • Software


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