A passive auto-focus camera control system

@article{Chen2010APA,
  title={A passive auto-focus camera control system},
  author={Chih-Yung Chen and Rey-Chue Hwang and Yu-Ju Chen},
  journal={Appl. Soft Comput.},
  year={2010},
  volume={10},
  pages={296-303}
}
This paper presents a passive auto-focus camera control system which can easily achieve the function of auto-focus with no necessary of any active component (e.g., infrared or ultrasonic sensor) in comparison with the conventional active focus system. To implement the technique we developed, the hardware system including the adjustable lens with CMOS sensor and servo motor, an 8051 image capture microcontroller, a field programmable gate array (FPGA) sharpness measurement circuit, a pulse width… CONTINUE READING
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