caa a22 4500 606206434 CHVBK 20210128101011.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00034-014-9871-9 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9871-9 A PWM-Mode Pixel-Parallel Image-Processing Circuit Performing Directional State-Propagation and Its Application to Subjective Contour Generation [Elektronische Daten] [Youngjae Kim, Takashi Morie] As an approach to constructing highly organized and intelligent image recognition systems mimicking the visual architecture in the human brain, we have designed an image processing circuit that performs a directional pixel-state propagation algorithm based on a pixel-parallel architecture using pulse-width modulation (PWM) signals. Directional pixel-state propagation can be used for subjective contour generation, which is a typical function of the visual system in the human brain to fill gaps in natural-image information. A PWM-mode circuit can provide more compact circuit configuration than digital circuits, and can achieve focal-plane analog processing by combining with image sensors without A/D converters. Such circuits are suitable for repetitive algorithms, which require offset-free arithmetic. The proof-of-concept LSI chip has been designed and fabricated using a 0.25 $$\upmu $$ μ m mixed-signal CMOS process. There are 35 $$\times $$ × 35 processing units included in the chip, the operation cycle time for propagation step is 2.2 $$\upmu $$ μ s, and the power consumption is 363mW at a supply voltage of 3.3V. In experiments using this LSI chip, we have successfully generated subjective contours of Kanizsa figures. Springer Science+Business Media New York, 2014 PWM nationallicence Pixel-parallel architecture nationallicence Focal-plane analog processing nationallicence Directional pixel-state propagation nationallicence Subjective contour generation nationallicence CMOS LSI nationallicence Kim Youngjae Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 808-0196, Kitakyushu, Japan aut Morie Takashi Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 808-0196, Kitakyushu, Japan aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/2(2015-02-01), 605-623 0278-081X 34:2<605 2015 34 34 https://doi.org/10.1007/s00034-014-9871-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9871-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Youngjae Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 808-0196, Kitakyushu, Japan aut NATIONALLICENCE 700 1- Morie Takashi Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 808-0196, Kitakyushu, Japan aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/2(2015-02-01), 605-623 0278-081X 34:2<605 2015 34 34