first commit

.github/workflows/main.yaml

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+name: Sync to Hugging Face hub
+on:
+  push:
+    branches: [main]
+
+  # to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  sync-to-hub:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          lfs: true
+      - name: Push to hub
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: git push --force https://Instantaneous1:$HF_TOKEN@huggingface.co/spaces/Instantaneous1/search-by-image main

.gitignore

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+env/
+images/
+__pycache__/
+*.tree
+secrets.toml
+kaggle.json

app.py

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+import streamlit as st
+import torch
+import os
+import torchvision
+from annoy import AnnoyIndex
+from PIL import Image
+import traceback
+from tqdm import tqdm
+from PIL import ImageFile
+from slugify import slugify
+import opendatasets as od
+import json
+
+ImageFile.LOAD_TRUNCATED_IMAGES = True
+FOLDER = "images/"
+NUM_TREES = 100
+FEATURES = 1000
+
+
+@st.cache_resource
+def load_dataset():
+    with open("kaggle.json", "w+") as f:
+        json.dump(
+            {
+                "username": st.secrets["username"],
+                "key": st.secrets["key"],
+            },
+            f,
+        )
+    od.download(
+        "https://www.kaggle.com/datasets/kkhandekar/image-dataset",
+        "images/",
+    )
+
+
+# Load a pre-trained image feature extractor model
+@st.cache_resource
+def load_model():
+    """Loads a pre-trained image feature extractor model."""
+    model = torch.hub.load(
+        "NVIDIA/DeepLearningExamples:torchhub",
+        "nvidia_efficientnet_b0",
+        pretrained=True,
+    )
+    model.eval()  # Set model to evaluation mode
+    return model
+
+
+# Get all file paths within a folder and its subfolders
+@st.cache_data
+def get_all_file_paths(folder_path):
+    """Returns a list of all file paths within a folder and its subfolders."""
+    file_paths = []
+    for root, _, files in os.walk(folder_path):
+        for file in files:
+            if not file.lower().endswith(
+                (".png", ".jpg", ".jpeg", ".tiff", ".bmp", ".gif")
+            ):
+                continue
+            file_path = os.path.join(root, file)
+            file_paths.append(file_path)
+    return file_paths
+
+
+# Load all the images from file paths
+@st.cache_data
+def load_images(file_paths):
+    """Load all the images from file paths."""
+    print("Loading images: ")
+    images = list()
+    for path in tqdm(file_paths):
+        try:
+            images.append(Image.open(path).resize([224, 224]))
+        except BaseException as e:
+            print("error loading ", path, e)
+    return images
+
+
+# Function to preprocess images
+def preprocess_image(image):
+    """Preprocesses an image for feature extraction."""
+    if image.mode == "RGB":  # Already has 3 channels
+        pass  # No need to modify
+    elif image.mode == "L":  # Grayscale image
+        image = image.convert("RGB")  # Convert to 3-channel RGB
+    else:  # Image has more than 3 channels
+        image = image.convert(
+            "RGB"
+        )  # Convert to 3-channel RGB, discarding extra channels
+    preprocess = torchvision.transforms.Compose(
+        [
+            # torchvision.transforms.Resize(224),  # Adjust for EfficientNet input size
+            torchvision.transforms.CenterCrop(224),
+            torchvision.transforms.ToTensor(),
+            torchvision.transforms.Normalize(
+                mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]
+            ),
+        ]
+    )
+    return preprocess(image)
+
+
+# Extract features from a list of images
+def extract_features(images, model):
+    """Extracts features from a list of images."""
+    print("Extracting features:")
+    features = []
+    for image in images:
+        with torch.no_grad():
+            feature = model(preprocess_image(image).unsqueeze(0)).squeeze(0)
+            features.append(feature.numpy())
+    return features
+
+
+# Build an Annoy index for efficient similarity search
+def build_annoy_index(features):
+    """Builds an Annoy index for efficient similarity search."""
+    print("Building annoy index:")
+    f = features[0].shape[0]  # Feature dimensionality
+    t = AnnoyIndex(f, "angular")  # Use angular distance for image features
+    for i, feature in tqdm(enumerate(features)):
+        t.add_item(i, feature)
+    t.build(NUM_TREES)  # Adjust num_trees for accuracy vs. speed trade-off
+    return t
+
+
+# Perform reverse image search
+def search_similar_images(uploaded_file, f=FEATURES, num_results=5):
+    """Finds similar images based on a query image feature."""
+    index = AnnoyIndex(f, "angular")
+    index.load(f"{slugify(FOLDER)}.tree")
+    query_image = Image.open(uploaded_file)
+    model = load_model()
+    # Extract features and search
+    query_feature = (
+        model(preprocess_image(query_image).unsqueeze(0)).squeeze(0).detach().numpy()
+    )
+    nearest_neighbors, distances = index.get_nns_by_vector(
+        query_feature, num_results, include_distances=True
+    )
+    return query_image, nearest_neighbors, distances
+
+
+@st.cache_data
+def save_embedding(folder=FOLDER):
+    if os.path.isfile(f"{slugify(FOLDER)}.tree"):
+        return
+    model = load_model()  # Load the model once
+    file_paths = get_all_file_paths(folder_path=folder)
+    images = load_images(file_paths)
+    features = extract_features(images, model)
+    index = build_annoy_index(features)
+    index.save(f"{slugify(FOLDER)}.tree")
+
+
+def display_image(idx, dist):
+    file_paths = get_all_file_paths(folder_path=FOLDER)
+    image = Image.open(file_paths[idx])
+    st.image(image.resize([256, 256]))
+    st.markdown("SimScore: -" + str(round(dist, 2)))
+    # st.markdown(file_paths[idx])
+
+
+if __name__ == "__main__":
+    # Main app logic
+    st.set_page_config(layout="wide")
+    st.title("Reverse Image Search App")
+
+    try:
+        load_dataset()
+        save_embedding(FOLDER)
+
+        # File uploader
+        uploaded_file = st.file_uploader(
+            "Choose an image like a car, cat, dog, flower, fruits, bike, aeroplane, person"
+        )
+
+        n_matches = st.slider(
+            "Num of matches to be displayed", min_value=3, max_value=100, value=5
+        )
+
+        if uploaded_file is not None:
+            query_image, nearest_neighbors, distances = search_similar_images(
+                uploaded_file, num_results=n_matches
+            )
+
+            st.image(query_image.resize([256, 256]), caption="Query Image", width=200)
+            st.subheader("Similar Images:")
+            cols = st.columns([1] * 5)
+            for i, (idx, dist) in enumerate(
+                zip(
+                    *[
+                        nearest_neighbors,
+                        distances,
+                    ]
+                )
+            ):
+                with cols[i % 5]:
+                    # Display results
+                    display_image(idx, dist)
+        else:
+            st.write("Please upload an image to start searching.")
+
+    except Exception as e:
+        traceback.print_exc()
+        print(e)
+        st.error("An error occurred: {}".format(e))

requirements.txt

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+annoy
+torch
+torchvision
+streamlit
+tqdm
+python-slugify
+opendatasets