我正在尝试构建一个图像分类器,但遇到了这篇文章标题中提到的错误。以下是我正在使用的代码。如何将我的numpy数组转换为函数fit()所需的形状?该数组的形状为(8020,)。我尝试打印输入形状:train_img_array.shape[1:],但它给出了空形状:()
import numpy as np
img_train.shape
img_valid.shape
img_train.head(5)
img_valid.head(5)
(8020, 4)
(2006, 4)
ID index class data
8030 11596 11596 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
2152 11149 11149 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
550 10015 10015 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
1740 9035 9035 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
9549 8218 8218 1 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
ID index class data
3312 5481 5481 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
9079 10002 10002 0 [[[0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0], ...
6129 11358 11358 0 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
1147 2613 2613 1 [[[255, 255, 255, 0], [255, 255, 255, 0], [255...
7105 5442 5442 1 [[[0, 0, 0], [0, 0, 0], [0, 0, 0], [0, 0, 0], ...
img_train.dtypes
ID int64
index int64
class int64
data object
dtype: object
train_img_array = np.array([])
train_id_array = np.array([])
train_lab_array = np.array([])
train_id_array = img_train['ID'].values
train_lab_array = img_train['class'].values
train_img_array =img_train['data'].values
train_img_array.shape
train_lab_array.shape
train_id_array.shape
(8020,)
(8020,)
(8020,)
# Importing the Keras libraries and other packages
#matplotlib inline
from __future__ import print_function
import keras
from keras.models import Sequential
from keras.layers import Conv2D
from keras.layers import MaxPooling2D
from keras.layers import Flatten
from keras.layers import Dense
from keras.layers import Dropout
Using Theano backend.
WARNING (theano.tensor.blas): Using NumPy C-API based implementation for BLAS functions.
classifier = Sequential()
classifier.add(Conv2D(32, (3, 3), padding='same', activation='relu', input_shape = (256, 256, 3)))
classifier.add(Conv2D(32, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Dropout(0.25))
classifier.add(Conv2D(64, (3, 3), padding='same', activation='relu'))
classifier.add(Conv2D(64, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Dropout(0.25))
classifier.add(Conv2D(64, (3, 3), padding='same', activation='relu'))
classifier.add(Conv2D(64, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Dropout(0.25))
classifier.add(Conv2D(64, (3, 3), padding='same', activation='relu'))
classifier.add(Conv2D(64, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Dropout(0.25))
classifier.add(Flatten())
classifier.add(Dense(units = 256, activation = 'relu'))
classifier.add(Dropout(0.25))
classifier.add(Dense(units = 1, activation = 'sigmoid')) classifier.compile(optimizer = 'adam', loss = 'binary_crossentropy', metrics = ['accuracy'])
classifier.summary()
batch_size = 32
epochs = 15
history = classifier.fit(train_img_array, train_lab_array, batch_size=batch_size, epochs=epochs, verbose=1,
validation_data=(valid_img_array, valid_lab_array))
classifier.evaluate(valid_img_array, valid_lab_array)
ValueError: Error when checking input: expected conv2d_1_input to have 4 dimensions, but got array with shape (8020, 1)
编辑:----------------------------------------------------------- 根据Nassim的要求,本文添加了一些更多的细节:
print(train_img_array)
[ array([[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0]],
[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
...,
[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0]]], dtype=uint8)
array([[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
...,
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0]]], dtype=uint8)]
print(list(train_img_array))
[array([[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0]],
[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
...,
[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0]]], dtype=uint8), array([[[255, 255, 255, 0],
[255, 255, 255, 0],
[255, 255, 255, 0],
...,
print(np.array(list(train_img_array)))
throws the error:
ValueError: could not broadcast input array from shape (700,584,4) into shape (700,584)
createModel()
。 - deeiipkeras
文档,conv2d
层的输入必须是 4 维的,类型为:(samples, channels, rows, cols)
或(samples, rows, cols, channels)
。 - Dav2357