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train_model.py
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import os
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import numpy as np
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from tensorflow.keras.models import Sequential
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from tensorflow.keras.layers import Conv2D, MaxPooling2D, Flatten, Dense
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from tensorflow.keras.preprocessing.image import ImageDataGenerator
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from tensorflow.keras.optimizers import Adam
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# Set paths to the dataset (adjust paths based on your directory structure)
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train_dir = './data/train'
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validation_dir = './data/validation'
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# Define the CNN model
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def create_cnn_model(input_shape=(224, 224, 3)):
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model = Sequential()
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model.add(Conv2D(32, (3, 3), activation='relu', input_shape=input_shape))
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model.add(MaxPooling2D((2, 2)))
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model.add(Conv2D(64, (3, 3), activation='relu'))
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model.add(MaxPooling2D((2, 2)))
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model.add(Conv2D(128, (3, 3), activation='relu'))
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model.add(MaxPooling2D((2, 2)))
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model.add(Flatten())
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model.add(Dense(128, activation='relu'))
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model.add(Dense(1, activation='sigmoid')) # Binary classification (Normal vs Abnormal)
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model.compile(optimizer=Adam(), loss='binary_crossentropy', metrics=['accuracy'])
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return model
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# Create the CNN model
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model = create_cnn_model()
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# ImageDataGenerator for training and validation
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train_datagen = ImageDataGenerator(rescale=1./255, rotation_range=40, width_shift_range=0.2,
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height_shift_range=0.2, shear_range=0.2, zoom_range=0.2,
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horizontal_flip=True, fill_mode='nearest')
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validation_datagen = ImageDataGenerator(rescale=1./255)
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# Flow training and validation data from directories
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train_generator = train_datagen.flow_from_directory(train_dir, target_size=(224, 224),
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batch_size=32, class_mode='binary')
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validation_generator = validation_datagen.flow_from_directory(validation_dir, target_size=(224, 224),
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batch_size=32, class_mode='binary')
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# Train the model
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history = model.fit(train_generator, epochs=10, validation_data=validation_generator)
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# Save the trained model
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model.save('classification_model.h5')
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