def run_barcode(video_filter, frame):
height, width, _ = frame.shape
"""width, height = 100, 100
frame = cv2.resize(frame, (width, height))"""
barcodes = pyzbar_decode(frame)
barcodes_detected = []
for barcode in barcodes:
(x, y, w, h) = barcode.rect
rect = QRectF(
x * 1.0 / width,
y * 1.0 / height,
w * 1.0 / width,
h * 1.0 / height,
)
points = []
for point in barcode.polygon:
p = QPointF(point.x * 1.0 / width, point.y * 1.0 / height)
points.append(p)
barcodes_detected.append({
"data": barcode.data.decode("utf-8"),
"type": barcode.type,
"rect": rect,
"polygon": points,
})
video_filter.barcodesDetected.emit(barcodes_detected)
def zbar_decode(img):
res = pyzbar_decode(img)
if len(res) == 0:
return None
elif len(res) == 1:
return res[0].data.decode("utf-8")
else:
return [r.data.decode("utf-8") for r in res]
def qr_decode(img):
""" img: uint8, 0-255
Args:
img:
Returns:
"""
res = pyzbar_decode(img)
if len(res) == 0:
return None
else:
return res[0].data.decode("utf-8")
def zbar_decode(img):
from pyzbar.pyzbar import decode as pyzbar_decode
#img = img.mean(axis=2)
res=pyzbar_decode(img)
if len(res)==0:
if len(img.shape)>2:
imgg = img.mean(axis=2)
res=pyzbar_decode(imgg)
if len(res)==0:
imgb = gaussian(img,1,preserve_range=True)
res=pyzbar_decode(imgb)
if len(res)==0:
imgc = adjust_log(img)
res=pyzbar_decode(imgc)
#if len(res)==0:
# imgs = unsharp_mask(img,preserve_range=True)
# res=pyzbar_decode(imgs)
if len(res)==0:
return None
elif len(res)==1:
return res[0].data.decode("utf-8")
else:
return [r.data.decode("utf-8") for r in res]
def execute(cls):
"""
This method constantly tries to catch barcodes from the camera :
if it does, search for info and add it to the user's grocery list.
"""
# Intro
print("-" * 80)
print("[:{ Jean-Pierre's Barcode Scanner : Running")
print("-" * 80)
# Database connection
Database.on()
# Load parameters
params = models.Params()
# Database : end connection
# (open it only when needed because this program is meant to be shutdown harshly)
Database.off()
# Camera setup
camera = picamera.PiCamera()
camera.sharpness = 100
camera.brightness = 50
camera.contrast = 25
camera.resolution = (params.camera_res_x, params.camera_res_y)
camera.start_preview()
# Double beep to inform the user that Jean-Pierre is ready
if params.buzzer_on:
buzzer = utils.Buzzer(params.buzzer_port)
buzzer.beep(2)
# Capture loop
last_scan = ''
empty_scans = 0
while True:
# Get an image from the camera
stream = BytesIO()
camera.capture(stream, format='jpeg')
stream.seek(0)
# Scan image for barcodes
barcodes = pyzbar_decode(pil_image.open(stream))[::-1]
# Count every empty scan
if not barcodes:
empty_scans += 1
# clean last_scan every 3 empty scans in a row
# Note : this allows to add an item multiple times
# by just leaving it in front of the camera.
if empty_scans == 3:
last_scan = ''
empty_scans = 0
# If something has been scanned
if barcodes:
# Get the first readable EAN-13 barcode from the scan
barcode = False
for seek in barcodes:
if seek.type == 'EAN13':
barcode = seek.data.decode()
break
if not barcode:
continue
# Break count of empty scans in a row
empty_scans = 0
# If the item has just been scanned : ignore this round
if barcode == last_scan:
continue
# Add found item to history
last_scan = barcode
print("Scanned and considered : {}".format(barcode))
# Beep !
if params.buzzer_on:
buzzer.beep()
# Analyze it in a separate thread
utils.FindProduct(barcode).start()
def parse_qr_code(self, img: Image):
decoded_texts = set()
for decoded in pyzbar_decode(img):
if decoded.type == "QRCODE":
decoded_texts.add(decoded.data.decode("utf-8"))
return decoded_texts or None