Opensource ML embedded evaluation kit
Change-Id: I12e807f19f5cacad7cef82572b6dd48252fd61fd
diff --git a/source/application/main/include/Classifier.hpp b/source/application/main/include/Classifier.hpp
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+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef CLASSIFIER_HPP
+#define CLASSIFIER_HPP
+
+#include "ClassificationResult.hpp"
+#include "TensorFlowLiteMicro.hpp"
+
+#include <vector>
+
+namespace arm {
+namespace app {
+
+ /**
+ * @brief Classifier - a helper class to get certain number of top
+ * results from the output vector from a classification NN.
+ **/
+ class Classifier{
+ public:
+ /** @brief Constructor. */
+ Classifier() = default;
+
+ /**
+ * @brief Gets the top N classification results from the
+ * output vector.
+ * @param[in] outputTensor Inference output tensor from an NN model.
+ * @param[out] vecResults A vector of classification results.
+ * populated by this function.
+ * @param[in] labels Labels vector to match classified classes.
+ * @param[in] topNCount Number of top classifications to pick. Default is 1.
+ * @return true if successful, false otherwise.
+ **/
+ virtual bool GetClassificationResults(
+ TfLiteTensor* outputTensor,
+ std::vector<ClassificationResult>& vecResults,
+ const std::vector <std::string>& labels, uint32_t topNCount);
+
+ private:
+ /**
+ * @brief Utility function that gets the top N classification results from the
+ * output vector.
+ * @tparam T value type
+ * @param[in] tensor Inference output tensor from an NN model.
+ * @param[out] vecResults A vector of classification results
+ * populated by this function.
+ * @param[in] topNCount Number of top classifications to pick.
+ * @param[in] labels Labels vector to match classified classes.
+ * @return true if successful, false otherwise.
+ **/
+ template<typename T>
+ bool _GetTopNResults(TfLiteTensor* tensor,
+ std::vector<ClassificationResult>& vecResults,
+ uint32_t topNCount,
+ const std::vector <std::string>& labels);
+ };
+
+} /* namespace app */
+} /* namespace arm */
+
+#endif /* CLASSIFIER_HPP */