MLECO-929 Add Object Detection sample application using the public ArmNN C++ API

Change-Id: I14aa1b4b726212cffbefd6687203f93f936fa872
Signed-off-by: Éanna Ó Catháin <eanna.ocathain@arm.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/samples/ObjectDetection/include/YoloResultDecoder.hpp b/samples/ObjectDetection/include/YoloResultDecoder.hpp
new file mode 100644
index 0000000000..98435e3cc9
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+++ b/samples/ObjectDetection/include/YoloResultDecoder.hpp
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+//
+// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include "Types.hpp"
+#include "ArmnnNetworkExecutor.hpp"
+#include "DetectedObject.hpp"
+#include "IDetectionResultDecoder.hpp"
+#include "NonMaxSuppression.hpp"
+
+namespace od
+{
+
+class YoloResultDecoder : public IDetectionResultDecoder
+{
+
+public:
+    /**
+     * Constructs Yolo V3  inference reuslts decoder.
+     *
+     * @param NMSThreshold non max suppression threshold
+     * @param ClsThreshold class probability threshold
+     * @param ObjectThreshold detected object score threshold
+     */
+    YoloResultDecoder(float NMSThreshold, float ClsThreshold, float ObjectThreshold);
+
+    DetectedObjects Decode(const InferenceResults& results,
+                           const Size& outputFrameSize,
+                           const Size& resizedFrameSize,
+                           const std::vector <std::string>& labels) override;
+private:
+    float m_NmsThreshold;
+    float m_ClsThreshold;
+    float m_objectThreshold;
+
+    unsigned int m_boxElements = 4U;
+    unsigned int m_confidenceElements = 1U;
+    unsigned int m_numClasses = 80U;
+    unsigned int m_numBoxes = 2535U;
+};
+}// namespace od
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