38 lines
4.6 KiB
Markdown
38 lines
4.6 KiB
Markdown
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# Hello Classification C++ Sample
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This sample demonstrates how to do inference of image classification models using Synchronous Inference Request API.
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Models with only one input and output are supported.
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For more detailed information on how this sample works, check the dedicated [article](https://docs.openvino.ai/2025/get-started/learn-openvino/openvino-samples/hello-classification.html)
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## Requirements
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| Options | Values |
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| ----------------------------| ------------------------------------------------------------------------------------------------------------------------------|
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| Model Format | OpenVINO™ toolkit Intermediate Representation (\*.xml + \*.bin), ONNX (\*.onnx) |
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| Supported devices | [All](https://docs.openvino.ai/2025/documentation/compatibility-and-support/supported-devices.html) |
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| Other language realization | [Python, C](https://docs.openvino.ai/2025/get-started/learn-openvino/openvino-samples/hello-classification.html), |
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The following C++ API is used in the application:
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| Feature | API | Description |
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| --------------------------| ---------------------------------------------------------------|----------------------------------------------------------------------------------------|
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| OpenVINO Runtime Version | ``ov::get_openvino_version`` | Get Openvino API version |
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| Basic Infer Flow | ``ov::Core::read_model``, | Common API to do inference: read and compile a model, create an infer request, |
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| | ``ov::Core::compile_model``, | configure input and output tensors |
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| | ``ov::CompiledModel::create_infer_request``, | |
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| | ``ov::InferRequest::set_input_tensor``, | |
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| | ``ov::InferRequest::get_output_tensor`` | |
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| Synchronous Infer | ``ov::InferRequest::infer`` | Do synchronous inference |
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| Model Operations | ``ov::Model::inputs``, | Get inputs and outputs of a model |
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| | ``ov::Model::outputs`` | |
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| Tensor Operations | ``ov::Tensor::get_shape`` | Get a tensor shape |
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| Preprocessing | ``ov::preprocess::InputTensorInfo::set_element_type``, | Set image of the original size as input for a model with other input size. Resize |
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| | ``ov::preprocess::InputTensorInfo::set_layout``, | and layout conversions are performed automatically by the corresponding plugin |
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| | ``ov::preprocess::InputTensorInfo::set_spatial_static_shape``, | just before inference. |
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| | ``ov::preprocess::PreProcessSteps::resize``, | |
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| | ``ov::preprocess::InputModelInfo::set_layout``, | |
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| | ``ov::preprocess::OutputTensorInfo::set_element_type``, | |
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| | ``ov::preprocess::PrePostProcessor::build`` | |
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