UltimateALPR v4.0 in progress, share your issues

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Mamadou DIOP

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Oct 30, 2025, 5:55:17 PMOct 30
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Hello,

We're working on UltimateALPR v4.0 and planning to replace Tensorflow
with Pytorch and use different architectures to solve some well-known
issues.

I'm pinning this post so that you can comment it with the issues you're
facing in v3.

Datasets are welcome.

Regards,

doubango-ai

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Nov 5, 2025, 6:38:59 PMNov 5
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I wanted to address some persistent requests done in this group by providing a patch hosted at  https://doubango.org/SDKs/anpr/ualpr_v3_15.patch
These are low priority requests for us and will be address in v4.
The patch adds:
- supports for Tensorflow 2.18.0 (CUDA 12.5), Tensorflow 2.16.1 (CUDA 12.3), Tensorflow 2.14.0 (CUDA 11.8)
- supports for TensorRT 10.x (CUDA 12.x) on Windows and Linux x86_64
- supports for Jetpack 6.2.0 and 7.0.0 on Jetson
this is not an official release, use it carefully (not fully vetted)

Jack Heaffey

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Nov 13, 2025, 11:36:26 AM (12 days ago) Nov 13
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Hi,

My issues with UltimateALPR are the following:

-  No support for the i.MX 8M Plus NPU
-  The VMMR models have not been updated in 3 years despite the documentation stating that they would be updated every 6 months -  https://www.doubango.org/SDKs/anpr/docs/Features.html#features-vehiclemakemodelrecognition
-  No support for Arabic or Cyrillic character sets

Jack

MARIO SHIN

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Nov 13, 2025, 7:28:39 PM (11 days ago) Nov 13
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Hello.

This is an issue I've raised before: Korean license plates frequently contain errors where the character ‘배’ is incorrectly recognized as ‘바’.
In that thread, you suggested a solution to convert ‘바’ to ‘배’ in the code. However, since license plates containing the ‘바’ character already exist, this approach does not resolve the problem.

The images attached below are examples of this error occurring in the test on the https://www.doubango.org/webapps/alpr/ page.

I sincerely hope this is improved in version v4.0.
Thank you.

0_18_대구80바4622_capture.jpg20250903_0815_5_대구80배1308_capture.jpg20250905_1414_18_대구80배5106_capture.jpg20250908_1128_1_대구80배2490_capture.jpg20250911_1059_13_대구80배1308_capture.jpg20250911_1130_7_대구80배5682_capture.jpg20250912_1223_12_대구80배4559_capture.jpg20250913_1156_1_대구80배3188_capture.jpg20250914_1822_16_대구80배4496_capture.jpg20250915_0954_16_대구80배1921_capture.jpg20250915_1645_17_대구80배3397_capture.jpg20250916_0858_16_경북85배5933_capture.jpg20250916_0936_12_대구80배5682_capture.jpg20250916_0942_19_대구80배3397_capture.jpg20250930_1558_12_대980바4496_capture.jpg20250930_1642_14_대구80배3397_capture.jpg20251002_0856_9_인천85배5933_capture.jpgtest_result.jpg

2025년 10월 31일 금요일 오전 6시 55분 17초 UTC+9에 Mamadou DIOP님이 작성:
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