Face Detection

Import KOI 2 Library

from future import *
from koi2 import KOI2

Serial Initialization

koi = KOI2(tx, rx)

Initializes the serial connection to KOI.

Parameters:

tx: TX Pin, use P2 for Robotbit EDU

rx: RX Pin, use P12 for Robotbit EDU

Select Face Mask Mode

koi.setModel(7)

Sets the KOI mode to Face Mask Detection.

Get Face Data

koi.xywh[0]

Returns data for the detected face.

Parameters:

data: The type of data to return.

data	Meaning
0	X coordinates
1	Y coordinates
2	Width of face
3	Height of face

Get Mask Value

koi.strVal

Returns whether the face detected is wearing a mask.

Return Value:

"with-mask": Person is wearing mask

"without-mask": Person is not wearing mask

Sample Code: Mask Detection

from future import *
from koi2 import KOI2



koi = KOI2('P2', 'P12')
koi.setModel(7)
sleep(15)
koi.direction(2)
koi.mirror(0)
screen.sync = 0
while True:
  koi.read_from_uart()
  screen.fill((0, 0, 0))
  screen.text(koi.strVal,5,10,2,(255, 255, 255))
  screen.text(koi.xywh[0],5,40,1,(255, 255, 255))
  screen.text(koi.xywh[1],5,60,1,(255, 255, 255))
  screen.text(koi.xywh[2],5,80,1,(255, 255, 255))
  screen.text(koi.xywh[3],5,100,1,(255, 255, 255))
  screen.refresh()

472B

Mask Detection.py

Open

Select Face Attribute Mode

koi.setModel(9)

Sets the KOI mode to Face Attribute Detection.

Get Face Data

koi.xywh[data]

Returns data for the detected face.

Parameters:

data: The type of data to return.

data	Meaning
0	X coordinates
1	Y coordinates
2	Width of face
3	Height of face

Get Number of Faces

koi.getFaceAttr(attr)

Returns the number of faces detected.

Return Value: Integer

Parameters:

attr:

attr(decimal)	meaning
8	Total number of faces detected
9	Total number of male detected
10	Total number of open mouths detected
11	Total number of smiles detected
12	Total number of glasses detected
13	Total number of female detected

Get Attribute of Main Character

Returns the attribute of main character.

Return Value: Boolean

Parameters:

attr:

attr(decimal)	meaning
4	Whether the person is a male
5	Whether the person has an open mouth
6	Whether the person is smiling
7	Whether the person is wearing glasses

Sample Code: Face Attribute

from future import *
from koi2 import KOI2



koi = KOI2('P2', 'P12')
koi.setModel(9)
sleep(15)
koi.direction(2)
koi.mirror(0)
screen.sync = 0
while True:
  koi.read_from_uart()
  screen.fill((0, 0, 0))
  screen.text(int(koi.getFaceAttr(4)),5,10,1,(255, 255, 255))
  screen.text(koi.xywh[0],5,30,1,(255, 255, 255))
  screen.text(koi.xywh[1],5,50,1,(255, 255, 255))
  screen.text(koi.xywh[2],5,70,1,(255, 255, 255))
  screen.text(koi.xywh[3],5,90,1,(255, 255, 255))
  screen.refresh()

484B

Face Attribute.py

Open