一、下载Tensorflow object detection API工程源码
网址：https://github.com/tensorflow/models，可通过Git下载，打开Git Bash，输入git clone https://github.com/tensorflow/models.git进行下载。
二、标记需要训练的图片
①、在第一步下载的工程文件models\research\object_detection目录下，建立一个my_test_images用来放测试test和训练train的文件夹。将需要识别的图片放在test和train中进行训练和测试。
②、到https://tzutalin.github.io/labelImg/下载labelImg工具，打开labelImg.exe，点击open dir，打开models\research\object_detection\my_test_images\test和train，对里面的所有照片标注完成，标注完成后保存为与图片名字一样的.xml文件。
③、在models\research\object_detection\my_test_images文件夹下新建名字为xml_to_csv文件夹，在xml_to_csv文件夹下新建test_xml_to_csv.py和train_xml_to_csv.py文件。
test_xml_to_csv.py代码如下：
1 # -*- coding: utf-8 -*- 2 """ 3 Created on Wed Mar 13 21:50:27 2019 4 5 @author: CFF 6 """ 7 8 import os 9 import glob 10 import pandas as pd 11 import xml.etree.ElementTree as ET 12 13 os.chdir('C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\test') 14 path = 'C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\test' 15 16 def xml_to_csv(path): 17 xml_list = [] 18 for xml_file in glob.glob(path + '/*.xml'): 19 tree = ET.parse(xml_file) 20 root = tree.getroot() 21 for member in root.findall('object'): 22 value = (root.find('filename').text, 23 int(root.find('size')[0].text), 24 int(root.find('size')[1].text), 25 member[0].text, 26 int(member[4][0].text), 27 int(member[4][1].text), 28 int(member[4][2].text), 29 int(member[4][3].text) 30 ) 31 xml_list.append(value) 32 column_name = ['filename', 'width', 'height', 'class', 'xmin', 'ymin', 'xmax', 'ymax'] 33 xml_df = pd.DataFrame(xml_list, columns=column_name) 34 return xml_df 35 def main(): 36 image_path = path 37 xml_df = xml_to_csv(image_path) 38 xml_df.to_csv('cat_test.csv', index=None)#cat_test.csv可以改为自己的文件名 39 print('Successfully converted xml to csv.') 40 main()
用Spyder打开test_xml_to_csv.py，点击编译，在C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\test目录下生成一个cat_test.csv文件，可用Excel打开。
同理，train_xml_to_csv.py代码如下：
1 # -*- coding: utf-8 -*- 2 """ 3 Created on Wed Mar 13 21:48:33 2019 4 5 @author: CFF 6 """ 7 import os 8 import glob 9 import pandas as pd 10 import xml.etree.ElementTree as ET 11 12 os.chdir('C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\train') 13 path = 'C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\train' 14 15 def xml_to_csv(path): 16 xml_list = [] 17 for xml_file in glob.glob(path + '/*.xml'): 18 tree = ET.parse(xml_file) 19 root = tree.getroot() 20 for member in root.findall('object'): 21 value = (root.find('filename').text, 22 int(root.find('size')[0].text), 23 int(root.find('size')[1].text), 24 member[0].text, 25 int(member[4][0].text), 26 int(member[4][1].text), 27 int(member[4][2].text), 28 int(member[4][3].text) 29 ) 30 xml_list.append(value) 31 column_name = ['filename', 'width', 'height', 'class', 'xmin', 'ymin', 'xmax', 'ymax'] 32 xml_df = pd.DataFrame(xml_list, columns=column_name) 33 return xml_df 34 def main(): 35 image_path = path 36 xml_df = xml_to_csv(image_path) 37 xml_df.to_csv('cat_train.csv', index=None) 38 print('Successfully converted xml to csv.') 39 main()
用Spyder打开train_xml_to_csv.py，点击编译，在C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\my_test_images\\train目录下生成一个cat_train.csv文件，可用Excel打开。
三、将cat_train.csv和cat_test.csv文件转换为train.record和test.record数据集
①、先将cat_train.csv和cat_test.csv文件放在C:\\Users\\CFF\\Desktop\\models\\research\\object_detection\\data文件夹下。
②、用Spyder在C:\\Users\\CFF\\Desktop\\models\\research\\object_detection文件夹下新建一个generate_tfrecord.py文件，generate_tfrecord.py代码如下：
1 # -*- coding: utf-8 -*- 2 """ 3 Created on Wed Mar 13 21:56:20 2019 4 5 @author: CFF 6 """ 7 8 """ 9 Usage: 10 # From tensorflow/models/ 11 # Create train data: 12 python generate_tfrecord.py --csv_input=data/cat_train.csv --output_path=data/train.record 13 # Create test data: 14 python generate_tfrecord.py --csv_input=data/cat_test.csv --output_path=data/test.record 15 """ 16 17 import os 18 import io 19 import pandas as pd 20 import tensorflow as tf 21 22 from PIL import Image 23 from object_detection.utils import dataset_util 24 from collections import namedtuple, OrderedDict 25 26 os.chdir('C:\\Users\\CFF\\Desktop\\models\\research\\object_detection') 27 28 flags = tf.app.flags 29 flags.DEFINE_string('csv_input', '', 'Path to the CSV input') 30 flags.DEFINE_string('output_path', '', 'Path to output TFRecord') 31 FLAGS = flags.FLAGS 32 33 34 # TO-DO replace this with label map 35 def class_text_to_int(row_label):#标签类型，根据实际情况写 36 if row_label == 'cat': 37 return 1 38 else: 39 None 40 41 42 def split(df, group): 43 data = namedtuple('data', ['filename', 'object']) 44 gb = df.groupby(group) 45 return [data(filename, gb.get_group(x)) for filename, x in zip(gb.groups.keys(), gb.groups)] 46 47 48 def create_tf_example(group, path): 49 with tf.gfile.GFile(os.path.join(path, '{}'.format(group.filename)), 'rb') as fid: 50 encoded_jpg = fid.read() 51 encoded_jpg_io = io.BytesIO(encoded_jpg) 52 image = Image.open(encoded_jpg_io) 53 width, height = image.size 54 55 filename = group.filename.encode('utf8') 56 image_format = b'jpg' 57 xmins = [] 58 xmaxs = [] 59 ymins = [] 60 ymaxs = [] 61 classes_text = [] 62 classes = [] 63 64 for index, row in group.object.iterrows(): 65 xmins.append(row['xmin'] / width) 66 xmaxs.append(row['xmax'] / width) 67 ymins.append(row['ymin'] / height) 68 ymaxs.append(row['ymax'] / height) 69 classes_text.append(row['class'].encode('utf8')) 70 classes.append(class_text_to_int(row['class'])) 71 72 tf_example = tf.train.Example(features=tf.train.Features(feature={ 73 'image/height': dataset_util.int64_feature(height), 74 'image/width': dataset_util.int64_feature(width), 75 'image/filename': dataset_util.bytes_feature(filename), 76 'image/source_id': dataset_util.bytes_feature(filename), 77 'image/encoded': dataset_util.bytes_feature(encoded_jpg), 78 'image/format': dataset_util.bytes_feature(image_format), 79 'image/object/bbox/xmin': dataset_util.float_list_feature(xmins), 80 'image/object/bbox/xmax': dataset_util.float_list_feature(xmaxs), 81 'image/object/bbox/ymin': dataset_util.float_list_feature(ymins), 82 'image/object/bbox/ymax': dataset_util.float_list_feature(ymaxs), 83 'image/object/class/text': dataset_util.bytes_list_feature(classes_text), 84 'image/object/class/label': dataset_util.int64_list_feature(classes), 85 })) 86 return tf_example 87 def main(_): 88 writer = tf.python_io.TFRecordWriter(FLAGS.output_path) 89 path = os.path.join(os.getcwd(), 'images') 90 examples = pd.read_csv(FLAGS.csv_input) 91 grouped = split(examples, 'filename') 92 for group in grouped: 93 tf_example = create_tf_example(group, path) 94 writer.write(tf_example.SerializeToString()) 95 writer.close() 96 output_path = os.path.join(os.getcwd(), FLAGS.output_path) 97 print('Successfully created the TFRecords: {}'.format(output_path)) 98 if __name__ == '__main__': 99 tf.app.run()
打开Anaconda Prompt，分别输入python generate_tfrecord.py --csv_input=data/cat_train.csv --output_path=data/train.record和python generate_tfrecord.py --csv_input=data/cat_test.csv --output_path=data/test.record，在data文件夹下将生成train.record和test.record文件。（注意：出现tensorflow object detection API 验证时报No module named 'object_detection'时，在安装路径Anaconda3\Lib\site-packages下，新建tensorflow_model.pth文件，内容为模型文件路径：如C:\Users\CFF\Desktop\mymodels\research 和C:\Users\CFF\Desktop\mymodels\research\slim）
③、在data文件夹下，新建一个cat_label_map.pbtxt文件，用Spyder打开，内容为：
1 item { 2 id: 1 3 name: 'cat' 4 }
可根据分类数量进行修改。
四、在C:\Users\CFF\Desktop\models\research\object_detection文件夹下，建立一个training文件夹。
到https://github.com/tensorflow/models/tree/master/research/object_detection/samples/configs下载ssd_mobilenet_v1_coco.config模型，在training文件夹下新建一个文本文档，命名为ssd_mobilenet_v1_coco.config，内容如下：
1 # SSD with Mobilenet v1 configuration for MSCOCO Dataset. 2 # Users should configure the fine_tune_checkpoint field in the train config as 3 # well as the label_map_path and input_path fields in the train_input_reader and 4 # eval_input_reader. Search for "PATH_TO_BE_CONFIGURED" to find the fields that 5 # should be configured. 6 7 model { 8 ssd { 9 num_classes: 1 #根据实际情况填写分类数量 10 box_coder { 11 faster_rcnn_box_coder { 12 y_scale: 10.0 13 x_scale: 10.0 14 height_scale: 5.0 15 width_scale: 5.0 16 } 17 } 18 matcher { 19 argmax_matcher { 20 matched_threshold: 0.5 21 unmatched_threshold: 0.5 22 ignore_thresholds: false 23 negatives_lower_than_unmatched: true 24 force_match_for_each_row: true 25 } 26 } 27 similarity_calculator { 28 iou_similarity { 29 } 30 } 31 anchor_generator { 32 ssd_anchor_generator { 33 num_layers: 6 34 min_scale: 0.2 35 max_scale: 0.95 36 aspect_ratios: 1.0 37 aspect_ratios: 2.0 38 aspect_ratios: 0.5 39 aspect_ratios: 3.0 40 aspect_ratios: 0.3333 41 } 42 } 43 image_resizer { 44 fixed_shape_resizer { 45 height: 300 46 width: 300 47 } 48 } 49 box_predictor { 50 convolutional_box_predictor { 51 min_depth: 0 52 max_depth: 0 53 num_layers_before_predictor: 0 54 use_dropout: false 55 dropout_keep_probability: 0.8 56 kernel_size: 1 57 box_code_size: 4 58 apply_sigmoid_to_scores: false 59 conv_hyperparams { 60 activation: RELU_6, 61 regularizer { 62 l2_regularizer { 63 weight: 0.00004 64 } 65 } 66 initializer { 67 truncated_normal_initializer { 68 stddev: 0.03 69 mean: 0.0 70 } 71 } 72 batch_norm { 73 train: true, 74 scale: true, 75 center: true, 76 decay: 0.9997, 77 epsilon: 0.001, 78 } 79 } 80 } 81 } 82 feature_extractor { 83 type: 'ssd_mobilenet_v1' 84 min_depth: 16 85 depth_multiplier: 1.0 86 conv_hyperparams { 87 activation: RELU_6, 88 regularizer { 89 l2_regularizer { 90 weight: 0.00004 91 } 92 } 93 initializer { 94 truncated_normal_initializer { 95 stddev: 0.03 96 mean: 0.0 97 } 98 } 99 batch_norm { 100 train: true, 101 scale: true, 102 center: true, 103 decay: 0.9997, 104 epsilon: 0.001, 105 } 106 } 107 } 108 loss { 109 classification_loss { 110 weighted_sigmoid { 111 } 112 } 113 localization_loss { 114 weighted_smooth_l1 { 115 } 116 } 117 hard_example_miner { 118 num_hard_examples: 3000 119 iou_threshold: 0.99 120 loss_type: CLASSIFICATION 121 max_negatives_per_positive: 3 122 min_negatives_per_image: 0 123 } 124 classification_weight: 1.0 125 localization_weight: 1.0 126 } 127 normalize_loss_by_num_matches: true 128 post_processing { 129 batch_non_max_suppression { 130 score_threshold: 1e-8 131 iou_threshold: 0.6 132 max_detections_per_class: 100 133 max_total_detections: 100 134 } 135 score_converter: SIGMOID 136 } 137 } 138 } 139 140 train_config: { 141 batch_size: 1 142 optimizer { 143 rms_prop_optimizer: { 144 learning_rate: { 145 exponential_decay_learning_rate { 146 initial_learning_rate: 0.004 147 decay_steps: 800720 148 decay_factor: 0.95 149 } 150 } 151 momentum_optimizer_value: 0.9 152 decay: 0.9 153 epsilon: 1.0 154 } 155 } 156 # fine_tune_checkpoint: "PATH_TO_BE_CONFIGURED/model.ckpt" 157 # from_detection_checkpoint: true 158 # Note: The below line limits the training process to 200K steps, which we 159 # empirically found to be sufficient enough to train the pets dataset. This 160 # effectively bypasses the learning rate schedule (the learning rate will 161 # never decay). Remove the below line to train indefinitely. 162 num_steps: 200000 163 data_augmentation_options { 164 random_horizontal_flip { 165 } 166 } 167 data_augmentation_options { 168 ssd_random_crop { 169 } 170 } 171 } 172 173 train_input_reader: { 174 tf_record_input_reader { 175 input_path:"data/train.record" 176 } 177 label_map_path:"data/cat_label_map.pbtxt" 178 } 179 180 eval_config: { 181 num_examples: 8000 182 # Note: The below line limits the evaluation process to 10 evaluations. 183 # Remove the below line to evaluate indefinitely. 184 max_evals: 10 185 } 186 187 eval_input_reader: { 188 tf_record_input_reader { 189 input_path:"data/test.record" 190 } 191 label_map_path:"data/cat_label_map.pbtxt" 192 shuffle: false 193 num_readers: 1 194 }
其中，num_classes: 1 是根据实际情况填写分类数量，input_path:"data/train.record"和input_path:"data/test.record"为之前在data文件加下生成的train.record文件和tets.record文件。label_map_path:"data/cat_label_map.pbtxt"也是之前在data中生成的文件。
五、训练模型
打开Anaconda Prompt，通过命令cd C:\Users\CFF\Desktop\models\research\object_detection到该目录下，运行以下命令：
1 python model_main.py --pipeline_config_path=training/ssd_mobilenet_v1_coco.config \ --model_dir=training \ --num_train_steps=50000 \ --num_eval_steps=2000 \
开始训练。训练一段时间后，可以在C:\Users\CFF\Desktop\models\research\object_detection，通过tensorboard --logdir=training命令，根据返回的网址在浏览器中打开，可以看到最新的图表。
六、测试自己的图片
①、在C:\Users\CFF\Desktop\models\research\object_detection\test_images文件夹下放需要识别的图片，用image1-imageN命名。
②、打开Anaconda Prompt，通过命令cd C:\Users\CFF\Desktop\models\research\object_detection到该目录下，输入python export_inference_graph.py \ --input_type image_tensor \ --pipeline_config_path training/ssd_mobilement_v1_coco.config \ --trained_checkpoint_prefix training/model.ckpt-9278\ --output_directory cat_detection。其中model.ckpt-9278为训练的最后步数，可在training文件下看到。在cat_detection
下生成以下文件。
③、打开Anaconda Prompt，通过命令cd C:\Users\CFF\Desktop\models\research\object_detection到该目录下，输入jupyter notebook回车，打开交互环境。下载对应的Python文件object_detection_tutorial.py到本地。
④、用Spyder打开object_detection_tutorial.py文件，代码如下：
1 # coding: utf-8 2 3 # # Object Detection Demo 4 # Welcome to the object detection inference walkthrough! This notebook will walk you step by step through the process of using a pre-trained model to detect objects in an image. Make sure to follow the [installation instructions](https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md) before you start. 5 6 # # Imports 7 8 # In[1]: 9 10 11 import numpy as np 12 import os 13 import six.moves.urllib as urllib 14 import sys 15 import tarfile 16 import tensorflow as tf 17 import zipfile 18 19 from distutils.version import StrictVersion 20 from collections import defaultdict 21 from io import StringIO 22 from matplotlib import pyplot as plt 23 from PIL import Image 24 25 # This is needed since the notebook is stored in the object_detection folder. 26 sys.path.append("..") 27 from object_detection.utils import ops as utils_ops 28 29 if StrictVersion(tf.__version__) < StrictVersion('1.12.0'): 30 raise ImportError('Please upgrade your TensorFlow installation to v1.12.*.') 31 32 33 # ## Env setup 34 35 # In[2]: 36 37 38 # This is needed to display the images. 39 get_ipython().run_line_magic('matplotlib', 'inline') 40 41 42 # ## Object detection imports 43 # Here are the imports from the object detection module. 44 45 # In[3]: 46 47 48 from utils import label_map_util 49 50 from utils import visualization_utils as vis_util 51 52 53 # # Model preparation 54 55 # ## Variables 56 # 57 # Any model exported using the `export_inference_graph.py` tool can be loaded here simply by changing `PATH_TO_FROZEN_GRAPH` to point to a new .pb file. 58 # 59 # By default we use an "SSD with Mobilenet" model here. See the [detection model zoo](https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/detection_model_zoo.md) for a list of other models that can be run out-of-the-box with varying speeds and accuracies. 60 61 # In[4]: 62 63 64 # What model to download. 65 MODEL_NAME = 'cat_detection' 66 #MODEL_FILE = MODEL_NAME + '.tar.gz' 67 #DOWNLOAD_BASE = 'http://download.tensorflow.org/models/object_detection/' 68 69 # Path to frozen detection graph. This is the actual model that is used for the object detection. 70 PATH_TO_FROZEN_GRAPH = MODEL_NAME + '/frozen_inference_graph.pb' 71 72 # List of the strings that is used to add correct label for each box. 73 PATH_TO_LABELS = os.path.join('data', 'cat_label_map.pbtxt') 74 75 76 # ## Download Model 77 78 # In[5]: 79 80 81 #opener = urllib.request.URLopener() 82 #opener.retrieve(DOWNLOAD_BASE + MODEL_FILE, MODEL_FILE) 83 #tar_file = tarfile.open(MODEL_FILE) 84 #for file in tar_file.getmembers(): 85 # file_name = os.path.basename(file.name) 86 # if 'frozen_inference_graph.pb' in file_name: 87 # tar_file.extract(file, os.getcwd()) 88 89 90 # ## Load a (frozen) Tensorflow model into memory. 91 92 # In[6]: 93 94 95 detection_graph = tf.Graph() 96 with detection_graph.as_default(): 97 od_graph_def = tf.GraphDef() 98 with tf.gfile.GFile(PATH_TO_FROZEN_GRAPH, 'rb') as fid: 99 serialized_graph = fid.read() 100 od_graph_def.ParseFromString(serialized_graph) 101 tf.import_graph_def(od_graph_def, name='') 102 103 104 # ## Loading label map 105 # Label maps map indices to category names, so that when our convolution network predicts `5`, we know that this corresponds to `airplane`. Here we use internal utility functions, but anything that returns a dictionary mapping integers to appropriate string labels would be fine 106 107 # In[7]: 108 109 110 category_index = label_map_util.create_category_index_from_labelmap(PATH_TO_LABELS, use_display_name=True) 111 112 113 # ## Helper code 114 115 # In[8]: 116 117 118 def load_image_into_numpy_array(image): 119 (im_width, im_height) = image.size 120 return np.array(image.getdata()).reshape( 121 (im_height, im_width, 3)).astype(np.uint8) 122 123 124 # # Detection 125 126 # In[9]: 127 128 129 # For the sake of simplicity we will use only 2 images: 130 # image1.jpg 131 # image2.jpg 132 # If you want to test the code with your images, just add path to the images to the TEST_IMAGE_PATHS. 133 PATH_TO_TEST_IMAGES_DIR = 'test_images' 134 TEST_IMAGE_PATHS = [ os.path.join(PATH_TO_TEST_IMAGES_DIR, 'image{}.jpg'.format(i)) for i in range(1, 5) ] 135 136 # Size, in inches, of the output images. 137 IMAGE_SIZE = (12, 8) 138 139 140 # In[10]: 141 142 143 def run_inference_for_single_image(image, graph): 144 with graph.as_default(): 145 with tf.Session() as sess: 146 # Get handles to input and output tensors 147 ops = tf.get_default_graph().get_operations() 148 all_tensor_names = {output.name for op in ops for output in op.outputs} 149 tensor_dict = {} 150 for key in [ 151 'num_detections', 'detection_boxes', 'detection_scores', 152 'detection_classes', 'detection_masks' 153 ]: 154 tensor_name = key + ':0' 155 if tensor_name in all_tensor_names: 156 tensor_dict[key] = tf.get_default_graph().get_tensor_by_name( 157 tensor_name) 158 if 'detection_masks' in tensor_dict: 159 # The following processing is only for single image 160 detection_boxes = tf.squeeze(tensor_dict['detection_boxes'], [0]) 161 detection_masks = tf.squeeze(tensor_dict['detection_masks'], [0]) 162 # Reframe is required to translate mask from box coordinates to image coordinates and fit the image size. 163 real_num_detection = tf.cast(tensor_dict['num_detections'][0], tf.int32) 164 detection_boxes = tf.slice(detection_boxes, [0, 0], [real_num_detection, -1]) 165 detection_masks = tf.slice(detection_masks, [0, 0, 0], [real_num_detection, -1, -1]) 166 detection_masks_reframed = utils_ops.reframe_box_masks_to_image_masks( 167 detection_masks, detection_boxes, image.shape[0], image.shape[1]) 168 detection_masks_reframed = tf.cast( 169 tf.greater(detection_masks_reframed, 0.5), tf.uint8) 170 # Follow the convention by adding back the batch dimension 171 tensor_dict['detection_masks'] = tf.expand_dims( 172 detection_masks_reframed, 0) 173 image_tensor = tf.get_default_graph().get_tensor_by_name('image_tensor:0') 174 175 # Run inference 176 output_dict = sess.run(tensor_dict, 177 feed_dict={image_tensor: np.expand_dims(image, 0)}) 178 179 # all outputs are float32 numpy arrays, so convert types as appropriate 180 output_dict['num_detections'] = int(output_dict['num_detections'][0]) 181 output_dict['detection_classes'] = output_dict[ 182 'detection_classes'][0].astype(np.uint8) 183 output_dict['detection_boxes'] = output_dict['detection_boxes'][0] 184 output_dict['detection_scores'] = output_dict['detection_scores'][0] 185 if 'detection_masks' in output_dict: 186 output_dict['detection_masks'] = output_dict['detection_masks'][0] 187 return output_dict 188 189 190 # In[11]: 191 192 193 for image_path in TEST_IMAGE_PATHS: 194 image = Image.open(image_path) 195 # the array based representation of the image will be used later in order to prepare the 196 # result image with boxes and labels on it. 197 image_np = load_image_into_numpy_array(image) 198 # Expand dimensions since the model expects images to have shape: [1, None, None, 3] 199 image_np_expanded = np.expand_dims(image_np, axis=0) 200 # Actual detection. 201 output_dict = run_inference_for_single_image(image_np, detection_graph) 202 # Visualization of the results of a detection. 203 vis_util.visualize_boxes_and_labels_on_image_array( 204 image_np, 205 output_dict['detection_boxes'], 206 output_dict['detection_classes'], 207 output_dict['detection_scores'], 208 category_index, 209 instance_masks=output_dict.get('detection_masks'), 210 use_normalized_coordinates=True, 211 line_thickness=8) 212 plt.figure(figsize=IMAGE_SIZE) 213 plt.imshow(image_np)
MODEL_NAME = 'cat_detection'为C:\Users\CFF\Desktop\models\research\object_detection文件加下建立的cat_detection目录。PATH_TO_FROZEN_GRAPH = MODEL_NAME + '/frozen_inference_graph.pb'为
cat_detection目录下的frozen_inference_graph.pb文件，PATH_TO_LABELS = os.path.join('data', 'cat_label_map.pbtxt')为data文件夹下的cat_label_map.pbtxt文件。PATH_TO_TEST_IMAGES_DIR = 'test_images'
为测试图片的路径。TEST_IMAGE_PATHS = [ os.path.join(PATH_TO_TEST_IMAGES_DIR, 'image{}.jpg'.format(i)) for i in range(1, 5) ] 是根据图片的数量来修改。保存，编译。在Spyder控制台将输出测试后的图片。