Author(s): Xie, S (Xie, Sheng); Wang, LH (Wang, Lihua); Mao, XR (Mao, Xurui); Cong, J (Cong, Jia); Zhao, YH (Zhao, Yuhao); Chen, HD (Chen, Hongda)

Source: IEEE PHOTONICS JOURNAL Volume: 14 Issue: 5 Article Number: 8853309 DOI: 10.1109/JPHOT.2022.3205585 Published: OCT 2022

Abstract: Inspired by the mechanism of visual attentional selection, a color feature selection unit consisting of photoreceptors and an attentional selection circuit (ASC) is presented. The detection and wavelength recognition of trichromatic light are accomplished by the photoreceptors with RGB filters. The ASC, fabricated in a standard CMOS technology, activates the competition among photoreceptors to select the principal color-component feature defined as the attentional focus. The number of focuses and resolution can be changed with a top-down stimulus. Electrical test results show that the ASC can select and interpret the most important color-component feature. In optical tests, the ASC chip-based unit can extract the principal color-component of single-color and dual-color light in real-time to complete color recognition. The percentage ratio between the intensity of stray light relative to the light with maximum intensity is up to 93.58%. And the maximum achievable recognition frame rate is 1 kHz, which is more than one order of magnitude higher than the frequency of the biological vision systems. Besides, the unit's outputs can be transformed into binary codes as labels for color recognition, and the color recognition process does not require the participation of ADC, CPU, and memory, consequently avoiding the von Neumann bottleneck.

Accession Number: WOS:000861428200002

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Mao, X. R.                  0000-0002-5261-8369

cong, jia                  0000-0003-3526-499X

ISSN: 1943-0655

eISSN: 1943-0647

Full Text: https://ieeexplore.ieee.org/document/9887858