From 3c79893217bc632c9b0efa815091bef3c779490c Mon Sep 17 00:00:00 2001
From: alexander <alexander.efremov@arm.com>
Date: Fri, 26 Mar 2021 21:42:19 +0000
Subject: Opensource ML embedded evaluation kit

Change-Id: I12e807f19f5cacad7cef82572b6dd48252fd61fd
---
 source/application/main/include/Classifier.hpp | 74 ++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 source/application/main/include/Classifier.hpp

(limited to 'source/application/main/include/Classifier.hpp')

diff --git a/source/application/main/include/Classifier.hpp b/source/application/main/include/Classifier.hpp
new file mode 100644
index 0000000..510e6f9
--- /dev/null
+++ b/source/application/main/include/Classifier.hpp
@@ -0,0 +1,74 @@
+/*
+ * 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 */
-- 
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