卷积神经网络-基于卷积神经网络实现的交通标志识别算法.zip

# 项目流程图 本项目的实现流程如下所示：  # 代码实现及解释 接下来我们就按照项目流程图来逐块实现,本项目数据集：[German data](https://d17h27t6h515a5.cloudfront.net/topher/2016/November/581faac4_traffic-signs-data/traffic-signs-data.zip) 如果打不开，则有备用链接：[备用](http://benchmark.ini.rub.de/?section=gtsrb&subsection=dataset) ```python #import important packages/libraries import numpy as np import tensorflow as tf import pickle import matplotlib.pyplot as plt import random import csv from sklearn.utils import shuffle from tensorflow.contrib.layers import flatten from skimage import transform as transf from sklearn.model_selection import train_test_split import cv2 from prettytable import PrettyTable %matplotlib inline SEED = 2018 ``` /home/ora/anaconda3/envs/tensorflow/lib/python3.6/site-packages/h5py/__init__.py:36: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`. from ._conv import register_converters as _register_converters WARNING:tensorflow:From /home/ora/anaconda3/envs/tensorflow/lib/python3.6/site-packages/tensorflow/contrib/learn/python/learn/datasets/base.py:198: retry (from tensorflow.contrib.learn.python.learn.datasets.base) is deprecated and will be removed in a future version. Instructions for updating: Use the retry module or similar alternatives. ```python # 导入数据并可视化 training_file = 'data/train.p' testing_file = 'data/test.p' with open(training_file,mode='rb') as f: train = pickle.load(f) with open(testing_file,mode='rb') as f: test = pickle.load(f) X_train,y_train = train['features'],train['labels'] X_test,y_test = test['features'],test['labels'] ``` # Dataset Summary and Expoloration 下面我们对德国交通指示牌数据集进行可视化处理 ```python n_train = len(X_train) n_test = len(X_test) _,IMG_HEIGHT,IMG_WIDTH,IMG_DEPTH = X_train.shape image_shape = (IMG_HEIGHT,IMG_WIDTH,IMG_DEPTH) with open('data/signnames.csv','r') as sign_name: reader = csv.reader(sign_name) sign_names = list(reader) sign_names = sign_names[1::] NUM_CLASSES = len(sign_names) print('Total number of classes:{}'.format(NUM_CLASSES)) n_classes = len(np.unique(y_train)) assert (NUM_CLASSES== n_classes) ,'1 or more class(es) not represented in training set' n_test = len(y_test) print('Number of training examples =',n_train) print('Number of testing examples =',n_test) print('Image data shape=',image_shape) print('Number of classes =',n_classes) ``` Total number of classes:43 Number of training examples = 34799 Number of testing examples = 12630 Image data shape= (32, 32, 3) Number of classes = 43 ```python #data visualization,show 20 images def visualize_random_images(list_imgs,X_dataset,y_dataset): #list_imgs:20 index _,ax = plt.subplots(len(list_imgs)//5,5,figsize=(20,10)) row,col = 0,0 for idx in list_imgs: img = X_dataset[idx] ax[row,col].imshow(img) ax[row,col].annotate(int(y_dataset[idx]),xy=(2,5),color='red',fontsize='20') ax[row,col].axis('off') col+=1 if col==5: row,col = row+1,0 plt.show() ls = [random.randint(0,len(y_train)) for i in range(20)] visualize_random_images(ls,X_train,y_train) ```  ```python def get_count_imgs_per_class(y, verbose=False): num_classes = len(np.unique(y)) count_imgs_per_class = np.zeros( num_classes ) for this_class in range( num_classes ): if verbose: print('class {} | count {}'.format(this_class, np.sum( y == this_class )) ) count_imgs_per_class[this_class] = np.sum(y == this_class ) #sanity check return count_imgs_per_class class_freq = get_count_imgs_per_class(y_train) print('------- ') print('Highest count: {} (class {})'.format(np.max(class_freq), np.argmax(class_freq))) print('Lowest count: {} (class {})'.format(np.min(class_freq), np.argmin(class_freq))) print('------- ') plt.bar(np.arange(NUM_CLASSES), class_freq , align='center') plt.xlabel('class') plt.ylabel('Frequency') plt.xlim([-1, 43]) plt.title("class frequency in Training set") plt.show() sign_name_table = PrettyTable() sign_name_table.field_names = ['class value', 'Name of Traffic sign'] for i in range(len(sign_names)): sign_name_table.add_row([sign_names[i][0], sign_names[i][1]] ) print(sign_name_table) ``` ------- Highest count: 2010.0 (class 2) Lowest count: 180.0 (class 0) -------  +-------------+----------------------------------------------------+ | class value | Name of Traffic sign | +-------------+----------------------------------------------------+ | 0 | Speed limit (20km/h) | | 1 | Speed limit (30km/h) | | 2 | Speed limit (50km/h) | | 3 | Speed limit (60km/h) | | 4 | Speed limit (70km/h) | | 5 | Speed limit (80km/h) | | 6 | End of speed limit (80km/h) | | 7 | Speed limit (100km/h) | | 8 | Speed limit (120km/h) | | 9 | No passing | | 10 | No passing for vechiles over 3.5 metric tons | | 11 | Right-of-way at the next intersection | | 12 | Priority road | | 13 | Yield | | 14 | Stop | | 15 | No vechiles | | 16 | Vechiles over 3.5 metric tons prohibited | | 17 | No entry | | 18 | General caution | | 19 | Dangerous curve to the left | | 20 | Dangerous curve to the right | | 21 | Double curve | | 22 | Bumpy road | | 23 | Slippery road | | 24 | Road narrows on the right | | 25 | Road work | | 26 | Traffic signals | | 27 | Pedestrians | | 28 | Children crossing | | 29 | Bicycles crossing | | 30 | Beware of ice/snow | | 31 | Wild animals crossing | | 32 | End of all speed and passing limits | | 33 | Turn right ahead | | 34 | Turn left ahead | | 35 | Ahead only |