jan24_cds_mushrooms/notebooks/JarviSpore

Mushroom Classification Model - JarviSpore

This repository contains JarviSpore, a mushroom image classification model trained on a multi-class dataset with 23 different types of mushrooms. Developed from scratch with TensorFlow and Keras, this model aims to provide accurate mushroom identification using advanced deep learning techniques, including Grad-CAM for interpreting predictions. This project explores the performance of from-scratch models compared to transfer learning.

Model Details

• Architecture: Custom CNN (Convolutional Neural Network)
• Number of Classes: 23 mushroom classes
• Input Format: RGB images resized to 224x224 pixels
• Framework: TensorFlow & Keras
• Training: Conducted on a machine with an i9 14900k processor, 192GB RAM, and an RTX 3090 GPU

Key Features

1. Multi-Class Classification: The model can predict among 23 mushroom species.
2. Regularization: Includes L2 regularization and Dropout to prevent overfitting.
3. Class Weighting: Manages dataset imbalances by applying specific weights for each class.
4. Grad-CAM Visualization: Utilizes Grad-CAM to generate heatmaps, allowing visualization of the regions influencing the model’s predictions.

Model Training

The model was trained using a structured dataset directory with data split as follows:

• train: Balanced training dataset
• validation: Validation set to monitor performance
• test: Test set to evaluate final accuracy

Main training hyperparameters include:

• Batch Size: 32
• Epochs: 20 with Early Stopping
• Learning Rate: 0.0001

Training was tracked and logged via MLflow, including accuracy and loss curves, as well as the best model weights saved automatically.

Model Usage

Prerequisites

Ensure the following libraries are installed:

pip install tensorflow pillow matplotlib numpy

Loading the Model

To load and use the model for predictions:

import tensorflow as tf
from PIL import Image
import numpy as np

# Load the model
model = tf.keras.models.load_model("path_to_model.h5")

# Prepare an image for prediction
def prepare_image(image_path):
    img = Image.open(image_path).convert("RGB")
    img = img.resize((224, 224))
    img_array = tf.keras.preprocessing.image.img_to_array(img)
    img_array = np.expand_dims(img_array, axis=0)
    return img_array

# Prediction
image_path = "path_to_image.jpg"
img_array = prepare_image(image_path)
predictions = model.predict(img_array)
predicted_class = np.argmax(predictions[0])

print(f"Predicted Class: {predicted_class}")

Grad-CAM Visualization

The integrated Grad-CAM functionality allows interpretation of the model’s predictions. To use it, select an image and apply the Grad-CAM function to display the heatmap overlaid on the original image, highlighting areas influencing the model.

Grad-CAM example usage:

# Example usage of the make_gradcam_heatmap function
heatmap = make_gradcam_heatmap(img_array, model, last_conv_layer_name="last_conv_layer_name")

# Superimpose the heatmap on the original image
superimposed_img = superimpose_heatmap(Image.open(image_path), heatmap)
superimposed_img.show()

Evaluation

The model was evaluated on the test set with an average accuracy above random chance, showing promising results for a first from-scratch version.

Contributing

Contributions to improve accuracy or add new features (e.g., other visualization techniques or advanced optimization) are welcome. Please submit a pull request with relevant modifications.

License

This model is licensed under a controlled license: please refer to the LICENSE file for details. You may use this model for personal projects, but any modifications or redistribution must be approved.