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Hello Friends,

I'm messing about with a facial recognition door locking project but it unlocks the condition is met. I've tried a few solution but none were successful and i'm stumped.The power is regulated with a one-channel relay switch but when i run my program it unlocks immediately. the project is based of this How to Create a Facial Recognition Door Lock With Raspberry Pi | Raspberry Pi | Maker Pro[^]
i'm new enough to python and any advice would be greatly appreciated.


import cv2
from picamera.array import PiRGBArray
from picamera import PiCamera
import numpy as np 
import pickle
import RPi.GPIO as GPIO
from time import sleep

relay_pin = [26]
GPIO.setmode(GPIO.BCM)
GPIO.setup(relay_pin, GPIO.OUT)
GPIO.output(relay_pin, 0)

with open('labels', 'rb') as f:
	dict = pickle.load(f)
	f.close()

camera = PiCamera()
camera.resolution = (640, 480)
camera.framerate = 30
rawCapture = PiRGBArray(camera, size=(640, 480))


faceCascade = cv2.CascadeClassifier("haarcascade_frontalface_default.xml")
recognizer = cv2.face.LBPHFaceRecognizer_create()
recognizer.read("trainer.yml")

font = cv2.FONT_HERSHEY_SIMPLEX

for frame in camera.capture_continuous(rawCapture, format="bgr", use_video_port=True):
	frame = frame.array
	gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
	faces = faceCascade.detectMultiScale(gray, scaleFactor = 1.5, minNeighbors = 5)
	for (x, y, w, h) in faces:
		roiGray = gray[y:y+h, x:x+w]

		id_, conf = recognizer.predict(roiGray)

		for name, value in dict.items():
			if value == id_:
				print(name)

		if conf <= 70:
			GPIO.output(relay_pin, 1)
			cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 0), 2)
			cv2.putText(frame, name + str(conf), (x, y), font, 2, (0, 0 ,255), 2,cv2.LINE_AA)

		else:
			GPIO.output(relay_pin, 0)

	cv2.imshow('frame', frame)
	key = cv2.waitKey(1)

	rawCapture.truncate(0)

	if key == 27:
		break

cv2.destroyAllWindows()


What I have tried:

Ive attempted putting in time stops to see if it was a code synchronization error and i've attempted booting the code at startup but none of these have seemed to work
Posted
Updated 4-May-20 20:56pm
v2

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