Problems in DataMatrix code scanning

[taruntyagi946]

Steps:

1. Clone googlesamples/mlkit/ios and install pods.
   At the time of these tests, project is using GoogleMLKit/BarcodeScanning (0.60.0)
   It is being run using Xcode 11.5 on macOS Catalina 10.15.4.

2. Run the barcode detector sample code on this image -
   

Results:

Actual: It does not recognize this DataMatrix code.
Expected: It recognizes this DataMatrix code. The code has valid data -
HP ProBook 440 G4,Z1Z83UT#ABA,5CD712BZVJ,1y1y0y

Verification:

Use an online decoder service - https://online-barcode-reader.inliteresearch.com/

Additional Info:

1. It is reproducible with ML Kit for Firebase sample as well.
2. I tried to change the image sharpness / contrast / exposure & color settings in Preview.app on macOS to no avail.
3. I also tried to run the camera mode on this image being in focus (while trying to change color settings mentioned in step 2) and it didn't help either.

[taruntyagi946]

Hi Team,

It's been over 2 months since this issue was reported.

Is there any way to know whether -

1. this is considered invalid bug and not being worked on
2. this is considered valid bug and will be fixed in an upcoming release
   ?

Thanks.

[twellsrez]

Hi all,

Any updates here? This ticket has been open 4.5 months now with no response. I have customers who can't perform scanning actions on valid DM codes that other tools can scan easily. I'd really like to be able to find a solution for them.

Thanks!

[miworking3]

Hi, we just got back from our research team:
The blurriness and the pixel size of the given image lead to the limitation of the barcode recognition on it:

Datamatrix size is 26 x 26 and image size is 90 x 78. Considering actual area of DM, every smallest square is of size 1.35 pixel, which is smaller than 3 pixel size criteria we have.

Please note that up-scaling same image will not work here because original image is blurry.