waitcondition/camera/docs/usecase2.md

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# Copyright (c) 2019-2020, NVIDIA CORPORATION.  All rights reserved.

@page waitcondition_usecase2 Wait Conditions Classification Workflow for Traffic Signs

@note SW Release Applicability: This tutorial is applicable to modules in **NVIDIA DRIVE Software** releases.

The following code snippet shows the general structure of a program that uses waitconditions classifier to classify detected traffic signs from a single camera. Note that error handling is left out for clarity.

Initialize SignNet default parameters and then the module:
```{.cpp}
dwSignNetParams signNetParams{};
dwSignNet_initDefaultParams(&signNetParams);
dwSignNet_initialize(&signNetHandle,&signNetParams, sdkHandle);
```

Initialize Waitcondition classifier module from initialized SignNet handle:
```{.cpp}
dwTrafficLightSignClassifier_initializeFromSignNet(&signClassifierHandle,
                                          signNetHandle,
                                          sdkHandle);
```

Classify detected traffic signs 'trafficSignList' from a frame:
```{.cpp}
dwTrafficLightSignClassifier_inferDeviceAsync(frame, &trafficSignList, numTrafficSigns, dwObjectClassTrafficSign, &objectClassifierHandle);
dwTrafficLightSignClassifier_interpretHost(numTrafficSigns, dwObjectClassTrafficSign, &objectClassifierHandle);
dwTrafficLightSignClassifier_getClassifiedObjects(&trafficSignList, numTrafficSigns, &objectClassifierHandle);

```

When finished, release the module handles:
```{.cpp}
dwTrafficLightSignClassifier_release(objectClassifierHandle);
dwSignNet_release(signNetHandle);
```

For more detailed workflow, please refer to the ligthClassifier sample: @ref dwx_sign_classification_sample