A Review of Bioinspired Vision Sensors and Their Applications

Abstract

Bioinspired vision sensors have become very attractive in recent years because of their inherent redundancy suppression, integrated processing, fast sensing capability, wide dynamic range, and low power consumption. These sensors combine functionalities of the biological "where" and "what" systems of the human visual system and process the visual information using an asynchronous event-driven method. Since the emergence of bioinspired vision sensors, various applications based on them have been proposed in the computer vision and robotics fields. In this paper, we review bioinspired vision sensors and their applications. The reviewed sensors include dynamic vision sensors (DVSs), asynchronous time-based image sensors (ATISs), and dynamic and active pixel vision sensors (DAVISs). The reviewed applications based on the bioinspired vision sensors include visual tracking, detection, recognition, simultaneous localization and mapping (SLAM), reconstruction, stereo matching, and control.

Nd0.5Bi2.5Fe5− yGayO12 thin films on Gd3Ga5O12 substrates prepared by metal–organic decomposition

“…[11][12][13][14][15][16][17][18][19][20][21] However, considering the figures of merit of Bi:RIGs, garnets with 2-2.5 Bi per chemical formula exhibit higher performance than BIG. 22) Regarding rare-earth elements, we have chosen neodymium, although most rare-earth elements can be used for garnets. [23][24][25][26] In the case of Bi:RIG films grown by liquid phase epitaxy (LPE), Y 3+ and Lu 3+ with small ionic radii have been used to reduce the lattice constants as Bi 3+ with a large ionic radius is substituted, because lattice matching with Gd 3 Ga 5 O 12 (GGG) substrates is required for the epitaxial growth of Bi:RIG films.…”