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Browse files- README.md +93 -9
- app.py +56 -0
- requirements.txt +4 -0
- resnet50_dryfruits.h5 +3 -0
README.md
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---
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pinned: false
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---
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# Dry Fruit Grade Classification
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This project uses a deep learning model to classify images of dry fruits (like almonds and cashews) into different quality grades (e.g., Grade A, Grade B).
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The model is built using TensorFlow/Keras and employs transfer learning with the **ResNet50** architecture.
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---
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## Results
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* **Training:** The final fine-tuned model achieved a peak **validation accuracy of ~99.7%** during training.
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* **Inference:** Real-world testing on individual images shows strong performance, with confidence scores often exceeding **99%**. Some images may yield lower confidence (e.g., ~75%) depending on quality and similarity to the training data.
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---
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## Dataset
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* **Source:** 850 original 720x720 images of various dry fruits.
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* **Augmentation:** The dataset was expanded "offline" (on-disk) to 42,600 images, including rotations, brightness/contrast changes, and noise.
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* **Classes:** The folder structure `DryFruits_Dataset/Fruit/Grade/` was reorganized into a flat structure (`dataset_flat/Fruit_Grade/`) for training.
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---
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## Model and Training
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The model is a pre-trained ResNet50 base with a new classification head (Global Average Pooling, a 128-node Dense layer, and a final Softmax output).
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The training was performed in a Google Colab notebook using a T4 GPU, following a crucial **two-stage process**:
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1. **Stage 1: Feature Extraction**
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* The ResNet50 base was frozen.
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* Only the new classification head was trained for 10 epochs. This quickly "warms up" the new layers.
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* **Result:** ~99.4% validation accuracy.
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2. **Stage 2: Fine-Tuning**
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* The entire model (including the ResNet50 base) was unfrozen.
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* The model was re-compiled with a **very low learning rate** (`1e-5`) to prevent destroying the pre-trained weights.
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* Training continued until `EarlyStopping` (monitoring `val_loss`) stopped the process.
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* **Final Result:** ~99.7% validation accuracy.
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---
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## How to Use
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### 1. Training the Model
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1. **Setup:**
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* Upload the project notebook to Google Colab.
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* Upload your dataset (e.g., `dryfruitsDataset.rar`) to Google Drive.
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2. **Run the Training Cells:**
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* **Cell 1 (Setup):** Mounts your Google Drive and un-RARs the dataset.
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* **Cell 2 (Reorganize):** Runs a script to convert the nested folder structure `(Almond/Grade_A)` into the flat structure `(Almond_Grade_A)` required by Keras.
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* **Cell 3 (Data Generators):** Loads the 42.6k images using `ImageDataGenerator`. It applies the mandatory ResNet50 preprocessing.
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* **Cell 4 (Stage 1 Training):** Trains the frozen model head.
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* **Cell 5 (Stage 2 Training):** Unfreezes and fine-tunes the full model, saving the best version as `resnet50_dryfruits_best.keras`.
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### 2. Running Inference (Predicting New Images)
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1. **Load Model:** In a new cell (ideally in the same notebook), load the saved model.
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```python
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from tensorflow.keras.models import load_model
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model = load_model('resnet50_dryfruits_best.keras')
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# Get the class mapping from the training generator
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# (This requires 'train_generator' to still be in memory)
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class_indices = train_generator.class_indices
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class_names = {v: k for k, v in class_indices.items()}
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```
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2. **Upload and Predict:** Use the provided inference code to upload a single image, preprocess it, and see the model's prediction.
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```python
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from google.colab import files
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from tensorflow.keras.preprocessing import image
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from tensorflow.keras.applications.resnet50 import preprocess_input
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import numpy as np
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# Upload an image
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uploaded = files.upload()
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test_image_path = list(uploaded.keys())[0]
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# Load and preprocess the image
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img = image.load_img(test_image_path, target_size=(224, 224))
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img_array = image.img_to_array(img)
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img_batch = np.expand_dims(img_array, axis=0)
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img_preprocessed = preprocess_input(img_batch)
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# Make prediction
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prediction = model.predict(img_preprocessed)
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predicted_index = np.argmax(prediction[0])
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predicted_class_name = class_names[predicted_index]
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confidence = np.max(prediction[0])
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print(f"Prediction: {predicted_class_name} | Confidence: {confidence*100:.2f}%")
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```
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app.py
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import streamlit as st
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import tensorflow as tf
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from tensorflow.keras.models import load_model
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from tensorflow.keras.preprocessing import image
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from tensorflow.keras.applications.resnet50 import preprocess_input
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import numpy as np
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from PIL import Image
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# --- Load Your Model and Class Names ---
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# Use st.cache_resource to load the model only once
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@st.cache_resource
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def load_my_model():
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# Make sure this file name matches your model file
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model = load_model('resnet50_dryfruits.h5')
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return model
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# --- This is the updated dictionary based on your list ---
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class_names = {
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0: 'AlmondGrade_A',
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1: 'CashewGrade_B',
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2: 'RaisinGrade_A',
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3: 'CashewGrade_A',
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4: 'AlmondGrade_B',
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5: 'PistachioGrade_A',
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6: 'RaisinGrade_B',
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7: 'WalnutGrade_A',
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8: 'CashewGrade_C'
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}
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# --------------------------------------------------------
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model = load_my_model()
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# --- App Interface ---
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st.title("Dry Fruit Quality Grader")
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st.write("Upload an image of a dry fruit, and the model will predict its grade.")
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uploaded_file = st.file_uploader("Choose an image...", type=["jpg", "jpeg", "png"])
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if uploaded_file is not None:
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# 1. Preprocess the image
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img = Image.open(uploaded_file).convert('RGB') # Ensure 3 channels
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img = img.resize((224, 224))
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img_array = image.img_to_array(img)
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img_batch = np.expand_dims(img_array, axis=0)
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img_preprocessed = preprocess_input(img_batch)
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# 2. Make prediction
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prediction = model.predict(img_preprocessed)
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predicted_index = np.argmax(prediction[0])
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predicted_class_name = class_names[predicted_index]
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confidence = np.max(prediction[0])
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# 3. Display results
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st.image(img, caption="Uploaded Image", use_column_width=True)
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st.markdown(f"## Prediction: **{predicted_class_name}**")
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st.markdown(f"### Confidence: **{confidence * 100:.2f}%**")
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requirements.txt
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tensorflow
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streamlit
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Pillow
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numpy
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resnet50_dryfruits.h5
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version https://git-lfs.github.com/spec/v1
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oid sha256:a4d1c65a486780cb6e1c33c9bda9eae34edb0c658ea450ca8cab12f064787d0e
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size 286585880
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