Advertisement

Pulse-Modulated Vision Chips with Versatile-Interconnected Pixels

  • Jun Ohta
  • Akihiro Uehara
  • Takashi Tokuda
  • Masahiro Nunoshita
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1800)

Abstract

This paper proposes and demonstrates novel types of vision chips that utilize pulse trains for image processing. Two types of chips were designed using 1.2 (µm double-metal double-poly CMOS process; one is based on a pulse width modulation (PWM) and the other is based on a pulse frequency modulation (PFM). In both chips the interaction between the pixels were introduced to realize the image pre-processing. The basic experimental and simulation results are shown for the PWM and PFM chips, respectively. Also the comparison between two types is discussed.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    For example, Koch, C, Li, H.: VISION CHIPS, Implementing Vision Algorithms with Analog VLSI Circuits. IEEE Computer Society Press, CA (1995).Google Scholar
  2. 2.
    For example, Mass, W., Bishop, CM. (eds.): Pulsed Neural Networks. The MIT Press, Mass. (1998).Google Scholar
  3. 3.
    Ni, Y., Devos, F., Boujrad, M., Guan, H.,: Histogram-Equalization-Based Adaptive Image Sensor for Real-Time Vision. IEEE J. Solid-State Circuits, 32 (1997) 1027–1036.CrossRefGoogle Scholar
  4. 4.
    Nagata, M., Homma, M., Takeda, N., Norie, T., Iwata, A.: A Smart CMOS Imager with Pixel Level PWM Signal Processing. IEEE 1999 Symposium on VLSI Circuits, (1999) 141–144.Google Scholar
  5. 5.
    Mead, C: Analog VLSI and Neural Systems. Addison-Wesley Pub. Inc., Mass. (1989).zbMATHGoogle Scholar
  6. 6.
    Yang, W.: A Wide-Dynamic-Range, Low-Power Photosensor Array. 1994 IEEE Int’l Solid-State Circuits Conference (1994) 230–231.Google Scholar
  7. 7.
    Andoh, F. Nakayama, M., Shimamoto, H., Fujita, Y.: A Digital Pixel Image Sensor with 1-bit ADC and 8-bit Pulse Counter in each Pixel. 1999 IEEE Workshop on Charge-Coupled Devices and Advanced Image Sensors, (1999) 44–47.Google Scholar
  8. 8.
    Wong, H.-S.: IEEE Trans. Electron Devices: Technology and Device Scaling Considerations for CMOS Imagers. 43 (1996) 2131–2142.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Jun Ohta
    • 1
  • Akihiro Uehara
    • 1
  • Takashi Tokuda
    • 1
  • Masahiro Nunoshita
    • 1
  1. 1.Graduate School of Materials ScienceNara Institute of Science and TechnologyIkoma, NaraJapan

Personalised recommendations