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diff --git a/tensorflow/examples/android/jni/object_tracking/keypoint.h b/tensorflow/examples/android/jni/object_tracking/keypoint.h
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+/* Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+
+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 THIRD_PARTY_TENSORFLOW_EXAMPLES_ANDROID_JNI_OBJECT_TRACKING_KEYPOINT_H_
+#define THIRD_PARTY_TENSORFLOW_EXAMPLES_ANDROID_JNI_OBJECT_TRACKING_KEYPOINT_H_
+
+#include "tensorflow/examples/android/jni/object_tracking/geom.h"
+#include "tensorflow/examples/android/jni/object_tracking/image-inl.h"
+#include "tensorflow/examples/android/jni/object_tracking/image.h"
+#include "tensorflow/examples/android/jni/object_tracking/log_streaming.h"
+#include "tensorflow/examples/android/jni/object_tracking/time_log.h"
+#include "tensorflow/examples/android/jni/object_tracking/utils.h"
+
+#include "tensorflow/examples/android/jni/object_tracking/config.h"
+
+namespace tf_tracking {
+
+// For keeping track of keypoints.
+struct Keypoint {
+  Keypoint() : pos_(0.0f, 0.0f), score_(0.0f), type_(0) {}
+  Keypoint(const float x, const float y)
+      : pos_(x, y), score_(0.0f), type_(0) {}
+
+  Point2f pos_;
+  float score_;
+  uint8 type_;
+};
+
+inline std::ostream& operator<<(std::ostream& stream, const Keypoint keypoint) {
+  return stream << "[" << keypoint.pos_ << ", "
+      << keypoint.score_ << ", " << keypoint.type_ << "]";
+}
+
+}  // namespace tf_tracking
+
+#endif  // THIRD_PARTY_TENSORFLOW_EXAMPLES_ANDROID_JNI_OBJECT_TRACKING_KEYPOINT_H_