[DL Streamer] Add Anomaly Post-Processing for PADIM

[ekaakurniawan]

Description

Add Anomaly Post-Processing for PADIM

• Add PADIM threshold normalization.
• Add PADIM prediction score.

Fixes #303
Reference: https://github.com/open-edge-platform/model_api/blob/0.2.5.1/model_api/cpp/models/src/anomaly_model.cpp

Any Newly Introduced Dependencies

No.

How Has This Been Tested?

Using PADIM model from Geti 2.10.1.

Checklist:

• I agree to use the APACHE-2.0 license for my code changes.
• I have not introduced any 3rd party components incompatible with APACHE-2.0.
• I have not included any company confidential information, trade secret, password or security token.
• I have performed a self-review of my code.

[ekaakurniawan]

@tbujewsk , please help on the two following items:

• Only tested using PADIM model. Please help to test using Uflow model.
• PADIM model needs input channel conversion BGR to RGB from the current implementation.

[tbujewsk]

@ekaakurniawan I see a lot of regressions testing your PR with PADIM,UFLow models.

[ekurniaw]

@tbujewsk , let me know if there is anything I can help.

I am currently looking at the following. If reverse_input_channels set to True, the color channel should be BGR. Reference: https://docs.openvino.ai/2025/model-server/ovms_docs_binary_input_layout_and_shape.html

edge-ai-libraries/libraries/dl-streamer/src/monolithic/gst/inference_elements/base/inference_impl.cpp

Line 423 in c291607

config[KEY_BASE][KEY_MODEL_FORMAT] = reverse_channels ? "RGB" : "BGR";

I will test against the anomaly detection models in Geti. I will use input image with red or blue dominant color to clearly differentiate the output instead of using the image with green dominant color.

[ekaakurniawan]

@tbujewsk , please find the the CL that is working for PADIM. cec7971

WARNING: The IE flow is currently reverted to OPENCV flow. The CL may break OPENCV flow. Please let me know if there is a plan to use back IE flow for OpenVINO. I can work on it as well.

edge-ai-libraries/libraries/dl-streamer/src/monolithic/gst/inference_elements/base/inference_impl.cpp

Line 324 in dd9f74f

GVA_WARNING("'pre-process-backend=ie' not supported with current settings, falling back to "

[ekaakurniawan]

Closed for now. The pre- and post- processing can be modified based on the requirements.