A simulation model for continuous autofocus design

Dong Chen Tsai, Zuo-Min Tsai , Homer Chen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The design of continuous autofocus algorithms often involves repetitive, time-consuming field tests on real scenes. This paper presents a simulation method to expedite the design by replacing laborious field tests with simulation tests. The modeling of scene dynamics is achieved by decomposing a dynamic scene into a sequence of static scenes and representing the sharpness responses of the video camera to each static scene by a reciprocal focus profile. Three different scenes and the associated dynamic models are incorporated into the simulation framework to obtain effective clues for the refinement of continuous autofocus algorithms. Experimental results are provided to show the effectiveness of this design-by-simulation method.

Original languageEnglish
Article number6689683
Pages (from-to)731-737
Number of pages7
JournalIEEE Transactions on Consumer Electronics
Issue number4
StatePublished - 1 Jan 2013


  • Camera
  • Continuous autofocus
  • Search strategy

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