app.py

import streamlit as st
from gcg.pipelines import predict
import os

# Define the directory to save uploaded files
TEMP_DIR = "temp"
os.makedirs(TEMP_DIR, exist_ok=True)  # Create the temp directory if it doesn't exist

st.title("Diabetic Retinopathy Classifier (Guided Context Gating Attention)")
st.subheader("Upload retinal images and get predictions with heatmaps")
st.write("This app is the demo of our ICIP'24 paper [[arXiv]](https://arxiv.org/pdf/2406.13126) | [[Github]](https://github.com/tejacherukuri/guided-context-gating)")

# File uploader to accept multiple images
uploaded_files = st.file_uploader(
    "Upload Retinal Images", 
    type=["jpg", "jpeg", "png"], 
    accept_multiple_files=True
)

if st.button("Run Inference"):
    if uploaded_files:
        img_paths = []
        for uploaded_file in uploaded_files:
            # Save each uploaded file to the temp directory
            file_path = os.path.join(TEMP_DIR, uploaded_file.name)
            with open(file_path, "wb") as f:
                f.write(uploaded_file.getbuffer())
            img_paths.append(file_path)  # Collect the file path for inference

        # Pass the file paths to the predict function
        st.info("Running predictions...")
        predictions = predict(img_paths)

        # Display predictions and heatmaps
        st.success("Inference completed! Here are the results:")
        for img_path, predicted_class in zip(img_paths, predictions):
            st.write(f"**Image**: {os.path.basename(img_path)}")
            st.write(f"**Predicted Class**: {predicted_class}")
            heatmap_path = os.path.join("heatmaps", f"heatmap_{os.path.basename(img_path)}")
            if os.path.exists(heatmap_path):
                st.image(heatmap_path, caption="Attention Map", use_container_width=True)
    else:
        st.error("Please upload at least one image.")