Question

我有一个顺序Keras模型，如下所示：

import tensorflow as tf
from tensorflow.keras.preprocessing.image import ImageDataGenerator
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Conv2D, MaxPooling2D
from tensorflow.keras.layers import Activation, Dropout, Flatten, Dense
from tensorflow.keras import backend as K
from tensorflow.keras.callbacks import TensorBoard, ReduceLROnPlateau
from sklearn.utils import class_weight
import numpy as np


# dimensions of our images.====================================================================================================
img_width, img_height = 200, 200

train_data_dir = 'augmentedImg/200/training_data'#=============================================================================
validation_data_dir = 'augmentedImg/200/validation_data'#=============================================================================
nb_train_samples = 9009
nb_validation_samples = 2252
epochs = 100
batch_size = 32

layer_size = 64

if K.image_data_format() == 'channels_first':
    input_shape = (3, img_width, img_height)
else:
    input_shape = (img_width, img_height, 3)

model = Sequential()
model.add(Conv2D(layer_size, (3, 3), input_shape=input_shape))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))

model.add(Conv2D(layer_size, (3, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))

model.add(Conv2D(layer_size, (3, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))

model.add(Conv2D(layer_size, (3, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))

model.add(Flatten())

#model.add(Dropout(0.5))

model.add(Dense(1))
model.add(Activation('sigmoid'))

model.compile(loss='binary_crossentropy',
              optimizer='adam',
              metrics=['accuracy'])

# this is the augmentation configuration we will use for training
train_datagen = ImageDataGenerator(
    rescale=1. / 255,
    rotation_range=90,
    width_shift_range=0.1,
    height_shift_range=0.1,
    shear_range=0.2,
    zoom_range=0.2,
    horizontal_flip=True
    )

test_datagen = ImageDataGenerator(rescale=1. / 255)

train_generator = train_datagen.flow_from_directory(
    train_data_dir,
    target_size=(img_width, img_height),
    color_mode='grayscale',
    batch_size=batch_size,
    class_mode='binary')

validation_generator = test_datagen.flow_from_directory(
    validation_data_dir,
    target_size=(img_width, img_height),
    color_mode='grayscale',
    batch_size=batch_size,
    class_mode='binary')

class_weights = class_weight.compute_class_weight(
               'balanced',
                np.unique(train_generator.classes), 
                train_generator.classes)

model.fit_generator(
    train_generator,
    class_weight=class_weights,
    steps_per_epoch=nb_train_samples // batch_size,
    epochs=epochs,
    validation_data=validation_generator,
    validation_steps=nb_validation_samples# // batch_size,
    #callbacks=[tensorboard, reduce_lr]
    )

model.save_weights('model.h5')
print("End of program")

我已将其转换为.tflite文件，如下所示：

将tensorflow导入为tf

converter = tf.lite.TFLiteConverter.from_keras_model_file("models/1Data_aug_200x200.h5")
tflite_model = converter.convert()
open("models/convertedModels/1Data_aug_200x200.tflite", "wb").write(tflite_model)

这是一个二进制分类问题。

通常，我将调用model.predict('myimg.jpg')，它将返回0或1，以表示它正在预测哪个类。

当我将其转换为.tflite文件并使用图像运行时，它会输出1到0之间的浮点数（例如0.102818926）

很少有文档描述我应该期望的输出，所以我的问题是如何解释这个数字？它接近0的事实是否意味着分类预测？

如何解释.tflite分类器的输出？

0 个答案: