inference.py

import torch
import argparse
from utils.inference_utils import preprocess_image, predict
from utils.train_utils import initialize_model
from utils.interpretability import lime_interpret_image_inference
from utils.data import CLASS_NAMES


def main():
    parser = argparse.ArgumentParser(description="Image Inference")
    parser.add_argument(
        "--model_name",
        type=str,
        help="Model name (resnet, alexnet, vgg, squeezenet, densenet)",
        default="resnet",
    )
    parser.add_argument(
        "--model_weights",
        type=str,
        help="Path to the model weights",
        default="./trained_models/pokemon_resnet.pth",
    )
    parser.add_argument(
        "--image_path",
        type=str,
        help="Path to the image",
        default="./pokemonclassification/PokemonData/Chansey/57ccf27cba024fac9531baa9f619ec62.jpg",
    )
    parser.add_argument(
        "--num_classes", type=int,  help="Number of classes", default=150
    )
    parser.add_argument(
        "--lime_interpretability",
        action="store_true",
        help="Whether to run interpretability or not",
    )
    parser.add_argument(
        "--classify",
        action="store_true",
        help="Whether to classify the image when saving the lime filter")
    
    args = parser.parse_args()

    if args.lime_interpretability:
        assert (
            args.model_name == "resnet"
        ), "Interpretability is only supported for ResNet model for now"

    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

    # Initialize the model
    model = initialize_model(args.model_name, args.num_classes)
    model = model.to(device)

    # Load the model weights
    model.load_state_dict(torch.load(args.model_weights, map_location=device))

    # Preprocess the image
    image = preprocess_image(args.image_path, (224, 224)).to(device)

    # Perform inference
    preds = torch.max(predict(model, image), 1)[1]
    print(f"Predicted class: {CLASS_NAMES[preds.item()]}")

    if args.lime_interpretability:
        lime_interpret_image_inference(args, model, image, device)


if __name__ == "__main__":
    main()