Matrix can not be recognised if printed as circles. WhY?

Hi @kursancew I am trying to recognise a matrix which is an arrangement of circles instead of rectangular.

The code is :

from pylibdmtx.pylibdmtx import decode
from PIL import Image
imPath='C:\\Users\\sns\\Documents\\P-Frames\\Defektenanerkenung\\MatlabScripts\\Tets_photos\\QR-code_X1.tif'
result = decode(Image.open(imPath))

After few second of decoding i got the answer “[]”

Is there any ideas how to proceed. Thanks

[ssnegir]

The outcome is: 000000000135299069 The image which is generated by my matlab code (see above) with further succesfully interpretation by python:

[kursancew]

python just wraps the C library, the C library may not be robust enough to decode the circles based image, you could try to process the images using scipy in a similar way that you did in Matlab? I’ve never seen data matrix printed as dots, I’m not sure it’s part of the standard.

My main suspicion would be on the detection of the L marker and timing, the “jaggedness” in the L may be stopping it from being detected by libdmtx.