Direct motion planning for vision-based control

R.S. Pieters, Z. Ye, P.P. Jonker, H. Nijmeijer

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)
4 Downloads (Pure)


This paper presents direct methods for vision-based control for the application of industrial inkjet printing. In this, visual control is designed with a direct coupling between camera measurements and joint motion. Traditional visual servoing commonly has a slow visual update rate and needs an additional local joint controller to guarantee stability. By only using the product as reference and sampling with a high update rate, direct visual measurements are sufficient for controlled positioning. The proposed method is simpler and more reliable than standard motor encoders, despite the tight real-time constraints. This direct visual control method is experimentally verified with a 2D planar motion stage for micrometer positioning. To achieve accurate and fast motion, a balance is found between frame rate and image size. With a frame rate of 1600 fps and an image size of 160 × 100 pixels we show the effectiveness of the approach.
Original languageEnglish
Pages (from-to)1282-1288
JournalIEEE Transactions on Automation Science and Engineering
Issue number4
Publication statusPublished - 2014


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