Volume 3 Issue 3
Jul.  2010
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YAN Long-jun, XIONG Wen-zhuo. Realization of auto-focusing system for video cameras based on TMS320DM642 DSP[J]. Chinese Optics, 2010, 3(3): 268-273.
Citation: YAN Long-jun, XIONG Wen-zhuo. Realization of auto-focusing system for video cameras based on TMS320DM642 DSP[J]. Chinese Optics, 2010, 3(3): 268-273.

Realization of auto-focusing system for video cameras based on TMS320DM642 DSP

  • Received Date: 12 Feb 2010
  • Publish Date: 30 Jun 2010
  • Focusing systems play an important role in a variety of optical measurements and detection instruments. In this paper, several kinds of auto-focusing methods were described and the relevant focusing evaluation functions were introduced based on image processing methods. An auto-focusing system based on image processing was designed by using the TMS320DM642 digital signal processing chip as a platform, and its programming was implemented by a real-time multi-tasking operating system DSP/BIOS developed by TI company. The real-time multi-tasking operating system provides a guarantee for the realization of task scheduling and real-time focusing. Moreover, some problems and solutions which are needed to pay attention in the realization of auto-focusing system were demonstrated. The system designed in this paper can find the image plane in 4-5 steps(about 2 s), which meets the requirements of practical applications.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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