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| import gradio as gr | |
| import torch | |
| from transformers import AutoFeatureExtractor, AutoModelForImageClassification, pipeline | |
| import os | |
| import zipfile | |
| import shutil | |
| import matplotlib.pyplot as plt | |
| from sklearn.metrics import accuracy_score, roc_auc_score, confusion_matrix, classification_report, roc_curve, auc | |
| from PIL import Image | |
| import uuid | |
| import tempfile | |
| import pandas as pd | |
| from numpy import exp | |
| import numpy as np | |
| from sklearn.metrics import ConfusionMatrixDisplay | |
| import urllib.request | |
| # Define model | |
| model = "cmckinle/sdxl-flux-detector" | |
| pipe = pipeline("image-classification", model) | |
| fin_sum = [] | |
| uid = uuid.uuid4() | |
| # Softmax function | |
| def softmax(vector): | |
| e = exp(vector - vector.max()) # for numerical stability | |
| return e / e.sum() | |
| # Single image classification function | |
| def image_classifier(image): | |
| labels = ["AI", "Real"] | |
| outputs = pipe(image) | |
| results = {} | |
| for idx, result in enumerate(outputs): | |
| results[labels[idx]] = float(outputs[idx]['score']) | |
| fin_sum.append(results) | |
| return results | |
| def aiornot(image): | |
| labels = ["AI", "Real"] | |
| feature_extractor = AutoFeatureExtractor.from_pretrained(model) | |
| model_cls = AutoModelForImageClassification.from_pretrained(model) | |
| input = feature_extractor(image, return_tensors="pt") | |
| with torch.no_grad(): | |
| outputs = model_cls(**input) | |
| logits = outputs.logits | |
| probability = softmax(logits) | |
| px = pd.DataFrame(probability.numpy()) | |
| prediction = logits.argmax(-1).item() | |
| label = labels[prediction] | |
| html_out = f""" | |
| <h1>This image is likely: {label}</h1><br><h3> | |
| Probabilities:<br> | |
| Real: {float(px[1][0]):.4f}<br> | |
| AI: {float(px[0][0]):.4f}""" | |
| results = { | |
| "Real": float(px[1][0]), | |
| "AI": float(px[0][0]) | |
| } | |
| fin_sum.append(results) | |
| return gr.HTML.update(html_out), results | |
| # Function to extract images from zip | |
| def extract_zip(zip_file): | |
| temp_dir = tempfile.mkdtemp() | |
| with zipfile.ZipFile(zip_file, 'r') as z: | |
| z.extractall(temp_dir) | |
| return temp_dir | |
| # Function to classify images in a folder | |
| def classify_images(image_dir): | |
| images = [] | |
| labels = [] | |
| preds = [] | |
| for folder_name, ground_truth_label in [('real', 1), ('ai', 0)]: | |
| folder_path = os.path.join(image_dir, folder_name) | |
| if not os.path.exists(folder_path): | |
| print(f"Folder not found: {folder_path}") | |
| continue | |
| for img_name in os.listdir(folder_path): | |
| img_path = os.path.join(folder_path, img_name) | |
| try: | |
| img = Image.open(img_path).convert("RGB") | |
| pred = pipe(img) | |
| pred_label = 0 if pred[0]['label'] == 'AI' else 1 | |
| preds.append(pred_label) | |
| labels.append(ground_truth_label) | |
| images.append(img_name) | |
| except Exception as e: | |
| print(f"Error processing image {img_name}: {e}") | |
| print(f"Processed {len(images)} images") | |
| return labels, preds, images | |
| # Function to generate evaluation metrics | |
| def evaluate_model(labels, preds): | |
| cm = confusion_matrix(labels, preds) | |
| accuracy = accuracy_score(labels, preds) | |
| roc_score = roc_auc_score(labels, preds) | |
| report = classification_report(labels, preds) | |
| fpr, tpr, _ = roc_curve(labels, preds) | |
| roc_auc = auc(fpr, tpr) | |
| fig, ax = plt.subplots() | |
| disp = ConfusionMatrixDisplay(confusion_matrix=cm, display_labels=["AI", "Real"]) | |
| disp.plot(cmap=plt.cm.Blues, ax=ax) | |
| plt.close(fig) | |
| fig_roc, ax_roc = plt.subplots() | |
| ax_roc.plot(fpr, tpr, color='blue', lw=2, label=f'ROC curve (area = {roc_auc:.2f})') | |
| ax_roc.plot([0, 1], [0, 1], color='gray', linestyle='--') | |
| ax_roc.set_xlim([0.0, 1.0]) | |
| ax_roc.set_ylim([0.0, 1.05]) | |
| ax_roc.set_xlabel('False Positive Rate') | |
| ax_roc.set_ylabel('True Positive Rate') | |
| ax_roc.set_title('Receiver Operating Characteristic (ROC) Curve') | |
| ax_roc.legend(loc="lower right") | |
| plt.close(fig_roc) | |
| return accuracy, roc_score, report, fig, fig_roc | |
| # Batch processing | |
| def process_zip(zip_file): | |
| extracted_dir = extract_zip(zip_file.name) | |
| labels, preds, images = classify_images(extracted_dir) | |
| accuracy, roc_score, report, cm_fig, roc_fig = evaluate_model(labels, preds) | |
| shutil.rmtree(extracted_dir) # Clean up extracted files | |
| return accuracy, roc_score, report, cm_fig, roc_fig | |
| # Single image section | |
| def load_url(url): | |
| try: | |
| urllib.request.urlretrieve(f'{url}', f"{uid}tmp_im.png") | |
| image = Image.open(f"{uid}tmp_im.png") | |
| mes = "Image Loaded" | |
| except Exception as e: | |
| image = None | |
| mes = f"Image not Found<br>Error: {e}" | |
| return image, mes | |
| def tot_prob(): | |
| try: | |
| fin_out = sum([result["Real"] for result in fin_sum]) / len(fin_sum) | |
| fin_sub = 1 - fin_out | |
| out = { | |
| "Real": f"{fin_out:.4f}", | |
| "AI": f"{fin_sub:.4f}" | |
| } | |
| return out | |
| except Exception as e: | |
| print(e) | |
| return None | |
| def fin_clear(): | |
| fin_sum.clear() | |
| return None | |
| # Set up Gradio app | |
| with gr.Blocks() as app: | |
| gr.Markdown("""<center><h1>AI Image Detector<br><h4>(Test Demo - accuracy varies by model)</h4></h1></center>""") | |
| with gr.Tabs(): | |
| # Tab for single image detection | |
| with gr.Tab("Single Image Detection"): | |
| with gr.Column(): | |
| inp = gr.Image(type='pil') | |
| in_url = gr.Textbox(label="Image URL") | |
| with gr.Row(): | |
| load_btn = gr.Button("Load URL") | |
| btn = gr.Button("Detect AI") | |
| mes = gr.HTML("""""") | |
| with gr.Group(): | |
| with gr.Row(): | |
| fin = gr.Label(label="Final Probability") | |
| with gr.Row(): | |
| with gr.Box(): | |
| gr.HTML(f"""<b>Testing on Model: <a href='https://huggingface.co/{model}'>{model}</a></b>""") | |
| outp = gr.HTML("""""") | |
| n_out = gr.Label(label="Output") | |
| btn.click(fin_clear, None, fin, show_progress=False) | |
| load_btn.click(load_url, in_url, [inp, mes]) | |
| btn.click(aiornot, [inp], [outp, n_out]).then( | |
| tot_prob, None, fin, show_progress=False) | |
| # Tab for batch processing | |
| with gr.Tab("Batch Image Processing"): | |
| zip_file = gr.File(label="Upload Zip (two folders: real, ai)") | |
| batch_btn = gr.Button("Process Batch") | |
| with gr.Group(): | |
| gr.Markdown(f"### Results for {model}") | |
| output_acc = gr.Label(label="Accuracy") | |
| output_roc = gr.Label(label="ROC Score") | |
| output_report = gr.Textbox(label="Classification Report", lines=10) | |
| output_cm = gr.Plot(label="Confusion Matrix") | |
| output_roc_plot = gr.Plot(label="ROC Curve") | |
| # Connect batch processing | |
| batch_btn.click(process_zip, zip_file, | |
| [output_acc, output_roc, output_report, output_cm, output_roc_plot]) | |
| app.launch(show_api=False, max_threads=24) |