From 024696b680b1611a2a4419533cd7f133eb155965 Mon Sep 17 00:00:00 2001
From: Sebastian Widmann <widmann3@hm.edu>
Date: Mon, 15 Apr 2019 15:48:10 +0200
Subject: [PATCH] first creation tensorrt graph export

---
 create_optimized_trt_graph.py | 80 +++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 create_optimized_trt_graph.py

diff --git a/create_optimized_trt_graph.py b/create_optimized_trt_graph.py
new file mode 100644
index 0000000..bc662f8
--- /dev/null
+++ b/create_optimized_trt_graph.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+# -*- coding:UTF-8 -*-
+
+import glob
+import argparse
+import os
+import time
+import tensorflow as tf
+
+from config import cfg
+from model import RPN3D
+
+from utils import *
+from utils.kitti_loader import iterate_data, sample_test_data
+
+from tensorflow.contrib import tensorrt as trt
+from tensorflow.python.platform import gfile
+
+parser = argparse.ArgumentParser(description='testing')
+parser.add_argument('-n', '--tag', type=str, nargs='?', default='pre_trained_car',
+                    help='set log tag')
+parser.add_argument('-b', '--single-batch-size', type=int, nargs='?', default=1,
+                    help='set batch size for each gpu')
+parser.add_argument('-o', '--output-path', type=str, nargs='?',
+                    default='./predictions', help='results output dir')
+parser.add_argument('-v', '--vis', type=bool, nargs='?', default=False,
+                        help='set the flag to True if dumping visualizations')
+args = parser.parse_args()
+
+
+dataset_dir = cfg.DATA_DIR
+test_dir = os.path.join(dataset_dir, 'testing')
+save_model_dir = os.path.join('.', 'save_model', args.tag)
+    
+
+def main(_):   
+    with tf.Graph().as_default():
+
+        gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=cfg.GPU_MEMORY_FRACTION,
+                            visible_device_list=cfg.GPU_AVAILABLE,
+                            allow_growth=True)
+
+        conf = tf.ConfigProto(
+            gpu_options=gpu_options,
+            device_count={
+                "GPU": cfg.GPU_USE_COUNT,
+            },
+            allow_soft_placement=True,
+        )
+
+        with tf.Session(config=config) as sess:
+            model = RPN3D(
+                cls=cfg.DETECT_OBJ,
+                single_batch_size=args.single_batch_size,
+                avail_gpus=cfg.GPU_AVAILABLE.split(',')
+            )        
+
+        nd_names = model.get_output_node_names()
+        node_list = []
+        # we ned the names of the tensor, not of the ops
+        for nd in nd_names:
+            node_list.append(nd + ':0')
+
+        calib_graph = load_graph(save_model_dir + "/frozen.pb")
+        with gfile.FastGFile(save_model_dir + "/frozen.pb", 'rb') as f:
+            graph_def = tf.GraphDef()
+            graph_def.ParseFromString(f.read())
+            trt_graph = trt.create_inference_graph(input_graph_def=graph_def,outputs=node_list, 
+                                                   max_batch_size=32,
+                                                   max_workspace_size_bytes=max_workspace_size_bytes,
+                                                   minimum_segment_size=1,
+                                                   precision_mode="FP16")
+            path_new_frozen_pb = save_model_dir + "/newFrozenModel_TRT_.pb"
+            with gfile.FastGFile(path_new_frozen_pb, 'wb') as fp:
+                fp.write(trt_graph.SerializeToString())
+                print("TRT graph written to path ", path_new_frozen_pb)
+
+
+if __name__ == '__main__':
+    tf.app.run(main)