我正在尝试使用ResNet50 Pretrained网络进行分段问题。我删除了最后一层并添加了我想要的图层。但是当我尝试适应时,我收到以下错误:
ValueError:检查目标时出错:预期conv2d_1具有形状(16,16,1)但是具有形状的数组(512,512,1)
我有两个文件夹:图像和面具。图像为RGB,掩模为灰度。所有图像的形状均为512x512。我无法确定我做错了哪一部分。
任何帮助将不胜感激。
from keras.applications.resnet50 import ResNet50
image_input=Input(shape=(512, 512, 3))
model = ResNet50(input_tensor=image_input,weights='imagenet',include_top=False)
x = model.output
x = Conv2D(1, (1,1), padding="same", activation="sigmoid")(x)
model = Model(inputs=model.input, outputs=x)
model.summary()
conv2d_1 (Conv2D) (None, 16, 16, 1) 2049 activation_49[0][0]
for layer in model.layers[:-1]:
layer.trainable = False
for layer in model.layers[-1:]:
layer.trainable = True
model.compile(optimizer=Adam(), loss='binary_crossentropy', metrics=['accuracy'])
你的网络提供了形状(16, 16, 1)
的输出,但你的y
(目标)有形状(512, 512, 1)
运行以下命令以查看此内容。
from keras.applications.resnet50 import ResNet50
from keras.layers import Input
image_input=Input(shape=(512, 512, 3))
model = ResNet50(input_tensor=image_input,weights='imagenet',include_top=False)
model.summary()
# Output shows that the ResNet50 network has output of shape (16,16,2048)
from keras.layers import Conv2D
conv2d = Conv2D(1, (1,1), padding="same", activation="sigmoid")
conv2d.compute_output_shape((None, 16, 16, 2048))
# Output shows the shape your network's output will have.
您的y
或您使用ResNet50的方式必须改变。阅读有关ResNet50的信息,了解您所缺少的内容。