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barcodescanner_debug.py
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barcodescanner_debug.py
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#!/usr/bin/env python3
import cv2
import numpy as np
import sys
import time
import os
from gpiozero import LED
tstart=time.time()
qrDecoder = cv2.QRCodeDetector()
cap = cv2.VideoCapture(0)
#on: program is running
#off: qr_detected
led_running_qr_detected = LED(17) # White, status
#blinking 5 times rapidly: fail, output==[]
led_detection_success_fail = LED(27) #yellow
print("init")
count=0
while True:
if count<10:
led_running_qr_detected.off()
elif 10<=count<20:
led_running_qr_detected.on()
else:
count=0
count=count+1
time.sleep(0.05)
led_detection_success_fail.off()
readsuccess, img = cap.read()
# print("read image")
detectionsuccess=False
#tbeforedetect=time.time()
if readsuccess:
detectionsuccess,points = qrDecoder.detect(img)
tafterdetect=time.time()
else:
print("read failed")
for i in range(0,10):
led_detection_success_fail.on()
led_running_qr_detected.off()
time.sleep(0.2)
led_detection_success_fail.off()
led_running_qr_detected.on()
time.sleep(0.2)
if detectionsuccess:
led_running_qr_detected.on()
print("detected")
print("time since start: \n",tafterdetect-tstart)
cv2.imwrite("qr_gelesen.jpeg", img)
tafterwrite=time.time()
#print("start:",tbeforedetect-tstart,"detect:",tafterdetect-tbeforedetect,"write",tafterwrite-tafterdetect)
#time.sleep(1)
# manually run first: run ./verify_ehc.py --certs-from AT,DE --save-certs trust_list.cbor
# check if trust_list.cbor exists TODO
commandstream=os.popen("cd /home/pi/verify-ehc/ && ./verify_ehc.py --image ../emb-impf/qr_gelesen.jpeg --certs-file trust_list.cbor")
output=commandstream.readlines() # readlines has \n or something
if output==[]: #yellow LED starts blinking
for i in range(0,4):
led_detection_success_fail.on()
time.sleep(0.1)
led_detection_success_fail.off()
time.sleep(0.1)
print("Error in barcodescanner.py: could not process qr code, try again!")
# cv2.imwrite("latest_qr_process_error_"+str(tafterdetect-tstart)+".jpeg",img)
cv2.imwrite("latest_qr_process_error.jpeg",img)
else:
#led_detection_success_fail.on()
time.sleep(2)
# print("output",output)
print("completed")
# print(commandstream.readlines())
commandstream.close()
# TODO clean up this output
# time.sleep(3)
#else:
#print("QR Code not detected")
#time.sleep(0.01)
#For debugging
#cv2.imwrite("qr_notfound.jpeg",img)
# cap.release()