#!/usr/bin/python
# original source: https://qiita.com/PoodleMaster/items/0afbce4be7e442e75be6
import cv2
#from pyzbar.pyzbar import decode, ZBarSymbol
from passporteye import read_mrz
VIDEO_DEVICE = 0 # can be an index or device path, eg /dev/video1
font = cv2.FONT_HERSHEY_SIMPLEX
def readMRZ( _set = None ):
cap = cv2.VideoCapture(VIDEO_DEVICE, cv2.CAP_DSHOW)
cap.open(VIDEO_DEVICE)
print("device open")
try:
while cap.isOpened():
print("reading...")
ret, frame = cap.read()
print("processing...")
if ret:
value = read_mrz(frame)
if value:
print(value)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
except KeyboardInterrupt:
return
finally:
cap.release()
if __name__ == '__main__':
from time import sleep
while True:
print(readMRZ())
sleep(1)
the code loops quietly until I show a document with MRZ i front of the camera... then it crashes:
Traceback (most recent call last):
File "/opt/porte_auto_engrenage/webcam_mrz.py", line 40, in <module>
print(readMRZ())
File "/opt/porte_auto_engrenage/webcam_mrz.py", line 25, in readMRZ
value = read_mrz(frame)
File "/usr/local/lib/python3.9/dist-packages/passporteye/mrz/image.py", line 355, in read_mrz
mrz = p.result
File "/usr/local/lib/python3.9/dist-packages/passporteye/mrz/image.py", line 343, in result
return self['mrz_final']
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 102, in __getitem__
self._compute(key)
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 109, in _compute
self._compute(d)
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 109, in _compute
self._compute(d)
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 109, in _compute
self._compute(d)
[Previous line repeated 1 more time]
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 111, in _compute
results = self.components[cname](*inputs)
File "/usr/local/lib/python3.9/dist-packages/passporteye/mrz/image.py", line 68, in __call__
scale_factor = self.max_width / float(img.shape[1])
AttributeError: 'NoneType' object has no attribute 'shape'
I tried to debug it myself, but got stuck failing to understand the relationship between pipeline.py line 111 in _compute and image.py line 68 in call.
on line 111 and just before the crash, inputs is [None].
So far, I haven't been able to successfully decode a single MRZ
WIhen calling read_mrz('100_id-rou.jpg') with an image path instead of reading from the cam,
or with
f = open('100_id-rou.jpg','rb')
mrz = read_mrz(f)
I get
File "/usr/local/lib/python3.9/dist-packages/skimage/io/_plugins/imageio_plugin.py", line 10, in imread
return np.asarray(imageio_imread(*args, **kwargs))
File "/usr/local/lib/python3.9/dist-packages/imageio/core/functions.py", line 159, in imread
with imopen(uri, "ri", plugin=format) as file:
File "/usr/local/lib/python3.9/dist-packages/imageio/core/imopen.py", line 277, in imopen
raise err_type(err_msg)
ValueError: Could not find a backend to open `100_id-rou.jpg`` with iomode `ri`.
If Instead I simply write
f = open('100_id-rou.jpg')
mrz = read_mrz(f)
the result (with little surprise) is
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 109, in _compute
self._compute(d)
[Previous line repeated 2 more times]
File "/usr/local/lib/python3.9/dist-packages/passporteye/util/pipeline.py", line 111, in _compute
results = self.components[cname](*inputs)
File "/usr/local/lib/python3.9/dist-packages/passporteye/mrz/image.py", line 54, in __call__
return self._imread(self.file)
File "/usr/local/lib/python3.9/dist-packages/passporteye/mrz/image.py", line 37, in _imread
img = skimage_io.imread(file, as_gray=self.as_gray, plugin='imageio')
File "/usr/local/lib/python3.9/dist-packages/skimage/io/_io.py", line 53, in imread
img = call_plugin('imread', fname, plugin=plugin, **plugin_args)
File "/usr/local/lib/python3.9/dist-packages/skimage/io/manage_plugins.py", line 207, in call_plugin
return func(*args, **kwargs)
File "/usr/local/lib/python3.9/dist-packages/skimage/io/_plugins/imageio_plugin.py", line 10, in imread
return np.asarray(imageio_imread(*args, **kwargs))
File "/usr/local/lib/python3.9/dist-packages/imageio/core/functions.py", line 159, in imread
with imopen(uri, "ri", plugin=format) as file:
File "/usr/local/lib/python3.9/dist-packages/imageio/core/imopen.py", line 233, in imopen
plugin_instance = config.plugin_class(request, **kwargs)
File "/usr/local/lib/python3.9/dist-packages/imageio/config/plugins.py", line 108, in partial_legacy_plugin
return LegacyPlugin(request, legacy_plugin)
File "/usr/local/lib/python3.9/dist-packages/imageio/core/legacy_plugin_wrapper.py", line 62, in __init__
if not self._format.can_read(request):
File "/usr/local/lib/python3.9/dist-packages/imageio/core/format.py", line 188, in can_read
return self._can_read(request)
File "/usr/local/lib/python3.9/dist-packages/imageio/plugins/pillow_legacy.py", line 269, in _can_read
if request.firstbytes and accept(request.firstbytes):
File "/usr/local/lib/python3.9/dist-packages/imageio/core/request.py", line 568, in firstbytes
self._read_first_bytes()
File "/usr/local/lib/python3.9/dist-packages/imageio/core/request.py", line 588, in _read_first_bytes
self._firstbytes = read_n_bytes(f, N)
File "/usr/local/lib/python3.9/dist-packages/imageio/core/request.py", line 613, in read_n_bytes
bb += extra_bytes
TypeError: can't concat str to bytes
However... since I haven't been able to decode anything I suppose I'm doing something wrong.. maybe someone has a clue?
furkankadioglu
commented
1 year ago
following some example, I put together this code:
the code loops quietly until I show a document with MRZ i front of the camera... then it crashes:
I tried to debug it myself, but got stuck failing to understand the relationship between pipeline.py line 111 in _compute and image.py line 68 in call.
on line 111 and just before the crash, inputs is [None].
So far, I haven't been able to successfully decode a single MRZ
WIhen calling read_mrz('100_id-rou.jpg') with an image path instead of reading from the cam,
or with
I get
If Instead I simply write
the result (with little surprise) is
However... since I haven't been able to decode anything I suppose I'm doing something wrong.. maybe someone has a clue?