||Face identification
Face identification2020-03-24T12:01:45+00:00

Face Identification on mW power budget using GAP8

Face Identification has attracted a lot of press relating to uses in security applications. It is, however, an interesting feature in many applications. Identifying the owner of a device versus another person can have many uses in creating user experiences. What if one could add face detection to a product at an extra cost of a few euros and at a power consumption compatible with many years of operation on a battery. The GAP8, IoT Application Processor makes this possible!

The input image is taken at Quarter VGA (QVGA) resolution (320 x 240 pixels). The Face Detection algorithm consumes around 1 mW per frame per second and frame rate of 10 frames per second consumes 1/7th fraction of GAP8’s compute power.

In its best power performance Face Reidentification CNN consumes 22mW per frame per second. This is only run when a face is detected and takes approximately 400mSec to evaluate. The CNN evaluated on the Labelled Faces in the Wild dataset (LFW) reaches 96% accuracy.

At these power levels, face identification can be integrated into a wide range of different devices with a very small effect on their battery life.

GreenWaves has released the full face identification stack including the training scripts and the GAP AutoTiler model under Apache 2.0 license.

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GAPPoc-A , Computer Vision Concept Board

GAPPoc-A is a Proof of Concept Board that can be used for demonstration of battery-operated, edge computer vision applications based on GAP8. The GAPPoc-A board enables battery operated applications developed around algorithms such as face-identification and many others to be quickly assembled and evaluated in the field.

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  • GAP8 ultra-low power IoT Application Processor
  • 64Kbit RAM + 512Kbit Flash  (HyperBus interface)
  • A monochrome image sensor (ON Semiconductor MT9V034) with up to WVGA (752×480) resolution, global shutter, support for 1/2 and 1/4 horizontal/vertical binning, arbitrary size cropping and HDR
  • S-mount holder for interchangeable M12 lens
  • Bluetooth Low Energy module (uBlox NINA B1), controllable through AT commands
  • Battery holder onboard (2/3A primary battery, 3.3V-3.6V)
  • Ultra-low profile “clip-on” connector for optional customer’s satellite board with serial interfaces (SPI/I2C/UART/GPIO)
  • 54mm pitch connectors for feature expansions and for debug
  • Requires an external probe for programming/debug (onboard 10-pin compact JTAG connector)