A 28 nm, 397 [formula omitted]W real-time dynamic gesture recognition chip based on RISC-V processor

Abstract

This paper presents a low-power programmable dynamic gesture recognition chip based on a RISC-V processor using RGB images. The chip uses two gesture recognition algorithms to recognize the most commonly used dynamic gestures (up, down, left, and right) with any shape of a hand at the distance of 10 cm ∼ 90 cm and speed of 10 cm/s ∼ 150 cm/s. The chip is fabricated in a 28 nm process and occupies an area of 640μm x 640μm. The accuracy reaches 93% ∼ 99% at complex backgrounds with 320x240 RGB image. It operates either in the recognition mode or in the standby mode that can be automatically switched to the other. The power consumption of the recognition mode is 397 μW at 0.584 V supply voltage, 25 MHz clock, and 30 FPS. And the power consumption of the standby mode at room temperature is 78.3 μW.