Abstract
We present an improved multiplexed analog resistive network for image preprocessing that features both edge detection and image segmentation without using resistive fuses. Based on a two-layer resistive network which performs Difference-of-two-Gaussians (DoG) spatial bandpass filtering, one layer of the network is multiplexed to implement both DoG and image segmentation by using the extracted edge information to control its resistors. The horizontal resistors are realized with single MOS transistors operating in the triode region. Their gates are supplied with high voltages generated on-chip by charge pumping devices to ensure operation in linear region. Additionally, a new algorithm for zero-crossing determination to detect edges is implemented, resulting in a significant reduction of about 40% in the number of transistors compared to existing methods.
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© 1997 Springer-Verlag Berlin Heidelberg
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Yi, CH., Schlabbach, R., Kroth, H., Klar, H. (1997). An improved multiplexed resistive network for analog image preprocessing. In: Gerstner, W., Germond, A., Hasler, M., Nicoud, JD. (eds) Artificial Neural Networks — ICANN'97. ICANN 1997. Lecture Notes in Computer Science, vol 1327. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0020309
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DOI: https://doi.org/10.1007/BFb0020309
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