102 lines
2.8 KiB
Python
102 lines
2.8 KiB
Python
import os
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from flask import Flask, render_template, send_from_directory, jsonify, request
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app = Flask(__name__)
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IMAGES_DIR = 'images'
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LABELS_DIR = 'labels'
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os.makedirs(LABELS_DIR, exist_ok=True)
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ALLOWED_EXTENSIONS = {'.png', '.jpg', '.jpeg', '.bmp', '.webp'}
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def get_image_files():
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files = []
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if os.path.exists(IMAGES_DIR):
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for f in os.listdir(IMAGES_DIR):
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_, ext = os.path.splitext(f)
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if ext.lower() in ALLOWED_EXTENSIONS:
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files.append(f)
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return sorted(files)
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def is_labeled(filename):
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name, _ = os.path.splitext(filename)
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label_path = os.path.join(LABELS_DIR, name + '.txt')
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return os.path.exists(label_path)
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@app.route('/')
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def index():
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return render_template('index.html')
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@app.route('/images/<path:filename>')
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def serve_image(filename):
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return send_from_directory(IMAGES_DIR, filename)
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@app.route('/api/next')
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def get_next_image():
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images = get_image_files()
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total = len(images)
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labeled_count = 0
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next_image = None
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for img in images:
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if is_labeled(img):
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labeled_count += 1
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elif next_image is None:
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next_image = img
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# If all labeled, next_image remains None
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return jsonify({
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'total': total,
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'labeled': labeled_count,
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'filename': next_image,
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'completed': next_image is None
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})
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@app.route('/api/save', methods=['POST'])
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def save_label():
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data = request.json
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filename = data.get('filename')
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boxes = data.get('boxes', []) # List of {x, y, w, h} in image pixels
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img_w = data.get('width')
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img_h = data.get('height')
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if not filename or not img_w or not img_h:
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return jsonify({'error': 'Missing data'}), 400
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name, _ = os.path.splitext(filename)
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label_path = os.path.join(LABELS_DIR, name + '.txt')
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lines = []
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for box in boxes:
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# YOLO format: class x_center y_center width height (normalized 0-1)
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# Class is 0 for signature
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# Ensure box is valid
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x = float(box['x'])
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y = float(box['y'])
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w = float(box['w'])
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h = float(box['h'])
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# Center coordinates
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center_x = (x + w / 2.0) / img_w
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center_y = (y + h / 2.0) / img_h
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norm_w = w / img_w
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norm_h = h / img_h
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# Clamp values just in case
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center_x = max(0.0, min(1.0, center_x))
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center_y = max(0.0, min(1.0, center_y))
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norm_w = max(0.0, min(1.0, norm_w))
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norm_h = max(0.0, min(1.0, norm_h))
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lines.append(f"0 {center_x:.6f} {center_y:.6f} {norm_w:.6f} {norm_h:.6f}")
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with open(label_path, 'w') as f:
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f.write('\n'.join(lines))
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return jsonify({'success': True})
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if __name__ == '__main__':
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app.run(debug=True, port=8080)
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