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unet.py
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unet.py
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import os
import glob
#os.environ["CUDA_VISIBLE_DEVICES"] = "0"
import numpy as np
from keras.models import *
from keras.layers import Input, merge, Conv2D, MaxPooling2D, UpSampling2D, Dropout, Cropping2D, Concatenate
from keras.optimizers import *
from keras.callbacks import ModelCheckpoint, LearningRateScheduler
from keras import backend as keras
from data import *
class myUnet(object):
def __init__(self, img_rows = 512, img_cols = 512):
self.img_rows = img_rows
self.img_cols = img_cols
# 参数初始化定义
def load_data(self):
mydata = dataProcess(self.img_rows, self.img_cols)
imgs_train, imgs_mask_train = mydata.load_train_data()
# [30, 512, 512, 1]
imgs_test = mydata.load_test_data()
return imgs_train, imgs_mask_train, imgs_test
# 载入数据
def get_unet(self):
inputs = Input((self.img_rows, self.img_cols,1))
# 网络结构定义，数据处理的时候已经转化为灰度图了
conv1 = Conv2D(64, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(inputs)
print ("conv1 shape:",conv1.shape)
conv1 = Conv2D(64, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv1)
print ("conv1 shape:",conv1.shape)
pool1 = MaxPooling2D(pool_size=(2, 2))(conv1)
print ("pool1 shape:",pool1.shape)
conv2 = Conv2D(128, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(pool1)
print ("conv2 shape:",conv2.shape)
conv2 = Conv2D(128, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv2)
print ("conv2 shape:",conv2.shape)
pool2 = MaxPooling2D(pool_size=(2, 2))(conv2)
print ("pool2 shape:",pool2.shape)
conv3 = Conv2D(256, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(pool2)
print ("conv3 shape:",conv3.shape)
conv3 = Conv2D(256, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv3)
print ("conv3 shape:",conv3.shape)
pool3 = MaxPooling2D(pool_size=(2, 2))(conv3)
print ("pool3 shape:",pool3.shape)
conv4 = Conv2D(512, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(pool3)
conv4 = Conv2D(512, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv4)
drop4 = Dropout(0.5)(conv4)
pool4 = MaxPooling2D(pool_size=(2, 2))(drop4)
conv5 = Conv2D(1024, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(pool4)
conv5 = Conv2D(1024, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv5)
drop5 = Dropout(0.5)(conv5)
up6 = Conv2D(512, 2, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(UpSampling2D(size = (2,2))(drop5))
# merge6 = merge([drop4,up6], mode = 'concat', concat_axis = 3)
merge6 = Concatenate(axis=3)([drop4, up6])
conv6 = Conv2D(512, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(merge6)
conv6 = Conv2D(512, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv6)
up7 = Conv2D(256, 2, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(UpSampling2D(size = (2,2))(conv6))
# merge7 = merge([conv3,up7], mode = 'concat', concat_axis = 3)
merge7 = Concatenate(axis=3)([conv3, up7])
conv7 = Conv2D(256, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(merge7)
conv7 = Conv2D(256, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv7)
up8 = Conv2D(128, 2, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(UpSampling2D(size = (2,2))(conv7))
# merge8 = merge([conv2,up8], mode = 'concat', concat_axis = 3)
merge8 = Concatenate(axis=3)([conv2,up8])
conv8 = Conv2D(128, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(merge8)
conv8 = Conv2D(128, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv8)
up9 = Conv2D(64, 2, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(UpSampling2D(size = (2,2))(conv8))
# merge9 = merge([conv1,up9], mode = 'concat', concat_axis = 3)
merge9 = Concatenate(axis=3)([conv1,up9])
conv9 = Conv2D(64, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(merge9)
conv9 = Conv2D(64, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv9)
conv9 = Conv2D(2, 3, activation = 'relu', padding = 'same', kernel_initializer = 'he_normal')(conv9)
conv10 = Conv2D(1, 1, activation = 'sigmoid')(conv9)
# [batch, 512, 512, 1]
model = Model(input = inputs, output = conv10)
model.compile(optimizer = Adam(lr = 1e-4), loss = 'binary_crossentropy', metrics = ['accuracy'])
return model
# 如果需要修改输入的格式，那么可以从以下开始修改，上面的结构部分不需要修改
def train(self):
print("loading data")
imgs_train, imgs_mask_train, imgs_test = self.load_data()
print("loading data done")
model = self.get_unet()
print("got unet")
model_checkpoint = ModelCheckpoint('my_unet.hdf5', monitor='loss',verbose=1, save_best_only=True)
print('Fitting model...')
model.fit(imgs_train, imgs_mask_train, batch_size=2, nb_epoch=100, verbose=1,validation_split=0.2, shuffle=True, callbacks=[model_checkpoint])
print('predict test data')
imgs_mask_test = model.predict(imgs_test, batch_size=1, verbose=1)
np.save('./results/imgs_mask_test.npy', imgs_mask_test)
def save_img(self):
print("array to image")
imgs = np.load('./results/imgs_mask_test.npy')
imgs_name = sorted(glob.glob("./raw/test"+"/*."+"tif"))
for i in range(imgs.shape[0]):
img = imgs[i]
imgname = imgs_name[i]
midname = imgname[imgname.rindex("/") + 1:]
img_order = midname[:-4]
img = array_to_img(img)
img.save("./results/%s.jpg"%(img_order))
if __name__ == '__main__':
myunet = myUnet()
myunet.train()
# myunet.save_img()