add grid_debug endpoint, previews, try/except to avoid errors
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131
alpr_api.py
131
alpr_api.py
@ -1,12 +1,15 @@
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import base64
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import io
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import json
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import logging
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import os
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import sys
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import threading
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import time
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import traceback
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import ultimateAlprSdk
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from PIL import Image
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from PIL import Image, ImageDraw, ImageFont
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from flask import Flask, request, jsonify, render_template
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# Setup logging
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@ -149,7 +152,6 @@ def create_rest_server_flask():
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@app.route('/v1/image/alpr', methods=['POST'])
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def alpr():
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"""
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This function is called when a POST request is made to the /v1/image/alpr endpoint.
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The function receives an image and processes it using the ultimateALPR SDK.
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Parameters:
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@ -159,6 +161,7 @@ def create_rest_server_flask():
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"""
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interference = time.time()
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try:
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if 'upload' not in request.files:
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return jsonify({'error': 'No image found'}), 400
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@ -179,14 +182,70 @@ def create_rest_server_flask():
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if not result['predictions']:
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logger.debug("No plate found in the image, attempting to split the image")
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predictions_found = find_best_plate_with_split(image, grid_size, wanted_cells)
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predictions_found = find_best_plate_with_grid_split(image, grid_size, wanted_cells)
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if predictions_found:
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result['predictions'].append(max(predictions_found, key=lambda x: x['confidence']))
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# Add the isolated plate image to the result
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if result['predictions']:
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isolated_plate_image = isolate_plate_in_image(image, result['predictions'][0])
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result['image'] = f"data:image/png;base64,{image_to_base64(isolated_plate_image, compress=True)}"
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result['processMs'] = round((time.time() - interference) * 1000, 2)
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result['inferenceMs'] = result['processMs']
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return jsonify(result)
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except Exception as e:
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logger.error(f"Error processing image: {e}")
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logger.error(traceback.format_exc())
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return jsonify({'error': 'Error processing image'}), 500
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@app.route('/v1/image/alpr_grid_debug', methods=['POST'])
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def alpr_grid_debug():
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"""
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The function receives an image and returns it with the grid overlayed on it (for debugging purposes).
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Parameters:
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- upload: The image to be processed
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- grid_size: The number of cells to split the image into (e.g. 4)
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- wanted_cells: The cells to process in the grid separated by commas (e.g. 1,2,3,4) (max: grid_size²)
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Returns:
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- The image with the grid overlayed on it
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"""
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try:
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if 'upload' not in request.files:
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return jsonify({'error': 'No image found'}), 400
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grid_size = int(request.form.get('grid_size', 3))
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wanted_cells = request.form.get('wanted_cells')
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if wanted_cells:
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wanted_cells = [int(cell) for cell in wanted_cells.split(',')]
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else:
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wanted_cells = list(range(1, grid_size * grid_size + 1))
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image = request.files['upload']
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if image.filename == '':
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return jsonify({'error': 'No selected file'}), 400
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image = Image.open(image)
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image = draw_grid_and_cell_numbers_on_image(image, grid_size, wanted_cells)
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image_base64 = image_to_base64(image, compress=True)
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result = {
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"image": f"data:image/png;base64,{image_base64}"
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}
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return jsonify(result)
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except Exception as e:
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logger.error(f"Error processing image: {e}")
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logger.error(traceback.format_exc())
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return jsonify({'error': 'Error processing image'}), 500
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@app.route('/')
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def index():
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@ -239,7 +298,41 @@ def convert_to_cpai_compatible(result):
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return response
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def find_best_plate_with_split(image: Image, grid_size: int = 3, wanted_cells: list = None):
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def draw_grid_and_cell_numbers_on_image(image: Image, grid_size: int = 3, wanted_cells: list = None) -> Image:
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if grid_size < 1:
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grid_size = 1
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if wanted_cells is None:
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wanted_cells = list(range(1, grid_size * grid_size + 1))
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width, height = image.size
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cell_width = width // grid_size
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cell_height = height // grid_size
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draw = ImageDraw.Draw(image)
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font = ImageFont.truetype(os.path.join(bundle_dir, 'assets', 'fonts', 'GlNummernschildEng-XgWd.ttf'),
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image.size[0] // 10)
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for cell_index in range(1, grid_size * grid_size + 1):
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row = (cell_index - 1) // grid_size
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col = (cell_index - 1) % grid_size
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left = col * cell_width
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upper = row * cell_height
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right = left + cell_width
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lower = upper + cell_height
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if cell_index in wanted_cells:
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draw.rectangle([left, upper, right, lower], outline="red", width=4)
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draw.text((left + 5, upper + 5), str(cell_index), fill="red", font=font)
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return image
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def find_best_plate_with_grid_split(image: Image, grid_size: int = 3, wanted_cells: list = None):
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if grid_size < 1:
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logger.debug("Grid size < 1, skipping split")
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return []
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if wanted_cells is None:
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wanted_cells = list(range(1, grid_size * grid_size + 1))
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@ -284,6 +377,36 @@ def find_best_plate_with_split(image: Image, grid_size: int = 3, wanted_cells: l
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return predictions_found
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def isolate_plate_in_image(image: Image, plate: dict) -> Image:
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x_min = plate['x_min']
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x_max = plate['x_max']
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y_min = plate['y_min']
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y_max = plate['y_max']
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offset = 10
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image = image.crop((max(0, x_min - offset), max(0, y_min - offset), min(image.size[0], x_max + offset),
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min(image.size[1], y_max + offset)))
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image = image.resize((int(image.size[0] * 3), int(image.size[1] * 3)), resample=Image.Resampling.LANCZOS)
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return image
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def image_to_base64(img: Image, compress=False):
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"""Convert a Pillow image to a base64-encoded string."""
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buffered = io.BytesIO()
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if compress:
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img = img.resize((int(img.size[0] / 2), int(img.size[1] / 2)))
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img.save(buffered, format="WEBP", quality=35, lossless=False)
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else:
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img.save(buffered, format="WEBP")
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print(buffered.__sizeof__())
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return base64.b64encode(buffered.getvalue()).decode('utf-8')
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if __name__ == '__main__':
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engine_thread = threading.Thread(target=start_backend_loop, daemon=True)
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engine_thread.start()
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@ -2,7 +2,7 @@
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta content="width=device-width, initial-scale=1.0" name="viewport">
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<title>Easy Local ALPR - API</title>
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<script src="https://cdn.tailwindcss.com"></script>
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<!-- Include Google Sans font -->
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@ -14,78 +14,190 @@
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background-size: 20px 20px;
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font-family: 'Google Sans', sans-serif;
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}
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.loading-circle {
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border: 4px solid rgba(0, 0, 0, 0.1);
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border-left-color: #000;
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border-radius: 50%;
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width: 24px;
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height: 24px;
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animation: spin 1s linear infinite;
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}
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@keyframes spin {
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to { transform: rotate(360deg); }
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}
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input[type="text"], input[type="number"] {
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background-color: white;
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color: black;
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}
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input[type="text"].dark, input[type="number"].dark {
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background-color: #3b3b3b;
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color: white;
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}
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</style>
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</head>
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<body class="bg-neutral-100 dark:bg-neutral-900 dark:text-white flex items-center justify-center min-h-screen p-4">
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<!-- Logo -->
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<div class="absolute top-4 left-4 z-50">
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<img id="logo" src="{{ url_for('static', filename='logo_black.webp') }}" alt="Logo" class="h-12 dark:hidden">
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<img id="logoDark" src="{{ url_for('static', filename='logo_white.webp') }}" alt="Logo" class="h-12 hidden dark:block">
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<!-- Logo -->
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<div class="absolute top-4 left-4 z-50">
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<img alt="Logo" class="h-12 dark:hidden" id="logo" src="{{ url_for('static', filename='logo_black.webp') }}">
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<img alt="Logo" class="h-12 hidden dark:block" id="logoDark"
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src="{{ url_for('static', filename='logo_white.webp') }}">
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</div>
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<div class="bg-white dark:bg-neutral-800 p-6 rounded-lg shadow-lg w-full max-w-md mt-16">
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<h1 class="text-2xl font-bold mb-4 text-center dark:text-gray-200">Select Service</h1>
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<form class="space-y-4" id="serviceForm">
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<div>
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<label class="block text-sm font-medium text-gray-700 dark:text-gray-300" for="service">Choose a
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service:</label>
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<select class="mt-1 block w-full py-2 px-3 border border-gray-300 bg-white dark:bg-neutral-800 dark:border-neutral-700 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm"
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id="service" name="service" onchange="updateFormFields()">
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<option value="alpr">Plate Recognition (ALPR)</option>
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<option value="alpr_grid_debug">Grid Size Helper</option>
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</select>
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</div>
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<div class="bg-white dark:bg-neutral-800 p-6 rounded-lg shadow-lg w-full max-w-md mt-16">
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<h1 class="text-2xl font-bold mb-4 text-center dark:text-gray-200">Upload Image for ALPR</h1>
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<form id="uploadForm" enctype="multipart/form-data" class="space-y-4">
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<!-- Plate Recognition (ALPR) Fields -->
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<div class="service-fields hidden" id="alprFields">
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<div>
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<label for="upload" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Choose an image:</label>
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<label for="upload_alpr" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Choose an
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image:</label>
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<div class="mt-1 flex items-center">
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<input type="file" id="upload" name="upload" accept="image/*" class="hidden" onchange="updateFileName()">
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<label for="upload" class="cursor-pointer inline-flex items-center justify-center px-4 py-2 border border-gray-400 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-300 bg-white dark:bg-neutral-800 hover:bg-neutral-50 dark:hover:bg-neutral-600">
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<input type="file" id="upload_alpr" name="upload" accept="image/*" class="hidden"
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onchange="updateFileName();">
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<label for="upload_alpr"
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class="cursor-pointer inline-flex items-center justify-center px-4 py-2 border border-gray-400 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-300 bg-white dark:bg-neutral-800 hover:bg-neutral-50 dark:hover:bg-neutral-600">
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Select file
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</label>
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<span id="fileName" class="ml-2 text-sm text-gray-600 dark:text-gray-300"></span>
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<span id="fileName_alpr" class="ml-2 text-sm text-gray-600 dark:text-gray-300"></span>
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</div>
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</div>
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<div>
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<label for="grid_size" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Grid Size:</label>
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<input type="number" id="grid_size" name="grid_size" value="3" class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark">
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<label for="grid_size_alpr" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Grid
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Size:</label>
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<input type="number" id="grid_size_alpr" name="grid_size" value="3"
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class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark dark:bg-neutral-800 dark:border-neutral-700">
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</div>
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<div>
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<label for="wanted_cells" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Wanted Cells:</label>
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<input type="text" id="wanted_cells" name="wanted_cells" class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark">
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<label for="wanted_cells_alpr" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Wanted
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Cells:</label>
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<input type="text" id="wanted_cells_alpr" name="wanted_cells" value=""
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class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark dark:bg-neutral-800 dark:border-neutral-700">
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</div>
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<!-- Hidden field to show plate image from the response in webui -->
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<input id="plate_image_alpr" name="plate_image_alpr" type="hidden" value="true">
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</div>
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<! -- Grid Size Helper Fields -->
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<div class="service-fields hidden" id="alpr_grid_debugFields">
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<div>
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<label for="upload_alpr_grid_debug" class="block text-sm font-medium text-gray-700 dark:text-gray-300">Choose
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an
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image:</label>
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<div class="mt-1 flex items-center">
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<input type="file" id="upload_alpr_grid_debug" name="upload" accept="image/*" class="hidden"
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onchange="updateFileName();">
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<label for="upload_alpr_grid_debug"
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class="cursor-pointer inline-flex items-center justify-center px-4 py-2 border border-gray-400 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-300 bg-white dark:bg-neutral-800 hover:bg-neutral-50 dark:hover:bg-neutral-600">
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Select file
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</label>
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<span id="fileName_alpr_grid_debug" class="ml-2 text-sm text-gray-600 dark:text-gray-300"></span>
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</div>
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</div>
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<div>
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<label for="grid_size_alpr_grid_debug"
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class="block text-sm font-medium text-gray-700 dark:text-gray-300">Grid
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Size:</label>
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<input type="number" id="grid_size_alpr_grid_debug" name="grid_size" value="3"
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class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark dark:bg-neutral-800 dark:border-neutral-700">
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</div>
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<div>
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<label for="wanted_cells_alpr_grid_debug"
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class="block text-sm font-medium text-gray-700 dark:text-gray-300">Wanted
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Cells:</label>
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<input type="text" id="wanted_cells_alpr_grid_debug" name="wanted_cells" value=""
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class="mt-1 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark dark:bg-neutral-800 dark:border-neutral-700">
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</div>
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</div>
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<div id="imagePreview" class="mt-4 hidden">
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<label id="imagePreviewLabel"
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class="block text sm font-medium text-gray-700 dark:text-gray-300">Preview:</label>
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<img id="previewImage" src="#" alt="Preview" class="max-w-full h-auto rounded-lg">
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</div>
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<button id="submitButton" type="submit" class="w-full py-2 px-4 bg-black text-white font-semibold rounded-md shadow-sm hover:bg-neutral-900 dark:bg-neutral-900 dark:hover:bg-neutral-950 relative flex justify-center items-center">
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<span>Upload</span>
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<div id="loadingCircle" class="loading-circle absolute hidden"></div>
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<button class="w-full py-2 px-4 bg-black text-white font-semibold rounded-md shadow-sm hover:bg-neutral-900 dark:bg-neutral-900 dark:hover:bg-neutral-950"
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id="submitButton"
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type="submit">
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Submit
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</button>
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</form>
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<div class="mt-6">
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<h2 class="text-xl font-semibold mb-2 dark:text-gray-200">Response</h2>
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<pre id="responseBox" class="bg-neutral-100 dark:bg-neutral-900 p-4 border rounded-lg text-sm text-gray-900 dark:text-gray-200 overflow-x-auto"></pre>
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</div>
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<h2 class="text-xl font-semibold mb-2 dark:text-gray-200">
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Response
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<span class="text-sm font-normal" id="timer"></span>
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</h2>
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<pre class="bg-neutral-100 dark:bg-neutral-900 p-4 border rounded-lg text-sm text-gray-900 dark:text-gray-200 overflow-x-auto"
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id="responseBox"></pre>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
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<script>
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function updateFormFields() {
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var service = document.getElementById('service').value;
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localStorage.setItem('selectedService', service); // Save the selected service
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elementsIdToEmpty = ['responseBox', 'timer', 'fileName_' + service, 'previewImage', 'imagePreview', 'upload_' + service];
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elementsIdToEmpty.forEach(element => {
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element = document.getElementById(element);
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console.log(element.tagName);
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switch (element.tagName) {
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case 'DIV':
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element.classList.add('hidden');
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break;
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case 'INPUT':
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element.value = '';
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break;
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case 'SPAN': // fallthrough
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case 'PRE':
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element.textContent = '';
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break;
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case 'IMG':
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element.src = '';
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break;
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}
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});
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var allServicesFields = document.getElementById('serviceForm').querySelectorAll('.service-fields');
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allServicesFields.forEach(field => {
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field.classList.add('hidden');
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field.querySelectorAll('input, select').forEach(field => field.disabled = true);
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});
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var selectedServiceFields = document.getElementById(service + 'Fields');
|
||||
selectedServiceFields.classList.remove('hidden');
|
||||
selectedServiceFields.querySelectorAll('input, select').forEach(field => field.disabled = false);
|
||||
}
|
||||
|
||||
function initializeForm() {
|
||||
var savedService = localStorage.getItem('selectedService');
|
||||
if (savedService) {
|
||||
document.getElementById('service').value = savedService;
|
||||
updateFormFields();
|
||||
}
|
||||
}
|
||||
|
||||
const prefersDarkScheme = window.matchMedia("(prefers-color-scheme: dark)");
|
||||
|
||||
function toggleLogo() {
|
||||
const logo = document.getElementById('logo');
|
||||
const logoDark = document.getElementById('logoDark');
|
||||
if (prefersDarkScheme.matches) {
|
||||
logo.style.display = 'none';
|
||||
logoDark.style.display = 'block';
|
||||
} else {
|
||||
logo.style.display = 'block';
|
||||
logoDark.style.display = 'none';
|
||||
}
|
||||
}
|
||||
|
||||
toggleLogo();
|
||||
prefersDarkScheme.addEventListener('change', toggleLogo);
|
||||
|
||||
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
|
||||
<script>
|
||||
function updateFileName() {
|
||||
var input = document.getElementById('upload');
|
||||
var fileName = document.getElementById('fileName');
|
||||
var service = document.getElementById('service').value;
|
||||
|
||||
var input = document.getElementById('upload_' + service);
|
||||
var fileName = document.getElementById('fileName' + '_' + service);
|
||||
var imagePreview = document.getElementById('imagePreview');
|
||||
var previewImage = document.getElementById('previewImage');
|
||||
var imagePreviewLabel = document.getElementById('imagePreviewLabel');
|
||||
|
||||
fileName.textContent = input.files[0] ? input.files[0].name : '';
|
||||
imagePreviewLabel.textContent = 'Preview:';
|
||||
|
||||
if (input.files && input.files[0]) {
|
||||
var reader = new FileReader();
|
||||
@ -99,59 +211,69 @@
|
||||
}
|
||||
}
|
||||
|
||||
const prefersDarkScheme = window.matchMedia("(prefers-color-scheme: dark)");
|
||||
function toggleLogo() {
|
||||
const logo = document.getElementById('logo');
|
||||
const logoDark = document.getElementById('logoDark');
|
||||
const upload = document.getElementById('upload');
|
||||
const gridSize = document.getElementById('grid_size');
|
||||
const wantedCells = document.getElementById('wanted_cells');
|
||||
|
||||
if (prefersDarkScheme.matches) {
|
||||
logo.style.display = 'none';
|
||||
logoDark.style.display = 'block';
|
||||
upload.classList.add('dark');
|
||||
gridSize.classList.add('dark');
|
||||
wantedCells.classList.add('dark');
|
||||
} else {
|
||||
logo.style.display = 'block';
|
||||
logoDark.style.display = 'none';
|
||||
upload.classList.remove('dark');
|
||||
gridSize.classList.remove('dark');
|
||||
wantedCells.classList.remove('dark');
|
||||
}
|
||||
}
|
||||
|
||||
toggleLogo();
|
||||
prefersDarkScheme.addEventListener('change', toggleLogo);
|
||||
|
||||
$(document).ready(function () {
|
||||
$('#uploadForm').on('submit', function (e) {
|
||||
initializeForm(); // Initialize the form on page load
|
||||
|
||||
$('#serviceForm').on('submit', function (e) {
|
||||
e.preventDefault();
|
||||
var service = $('#service').val();
|
||||
var formData = new FormData(this);
|
||||
$('#submitButton').prop('disabled', true);
|
||||
$('#loadingCircle').removeClass('hidden');
|
||||
|
||||
var url;
|
||||
if (service === 'alpr') {
|
||||
url = '/v1/image/alpr';
|
||||
type = 'POST';
|
||||
} else if (service === 'alpr_grid_debug') {
|
||||
url = '/v1/image/alpr_grid_debug';
|
||||
type = 'POST';
|
||||
}
|
||||
|
||||
var $submitButton = $('#submitButton');
|
||||
$submitButton.prop('disabled', true);
|
||||
$submitButton.html('<svg class="animate-spin h-5 w-5 text-white mx-auto" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none"><circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle><path class="opacity-75" fill="currentColor" d="M12 2a10 10 0 00-8 4.9l1.5 1A8 8 0 0112 4V2z"></path></svg>');
|
||||
|
||||
var startTime = Date.now();
|
||||
|
||||
$.ajax({
|
||||
url: '/v1/image/alpr',
|
||||
type: 'POST',
|
||||
url: url,
|
||||
type: type,
|
||||
data: formData,
|
||||
processData: false,
|
||||
contentType: false,
|
||||
success: function (data) {
|
||||
var endTime = Date.now();
|
||||
var elapsedTime = endTime - startTime;
|
||||
|
||||
$('#responseBox').text(JSON.stringify(data, null, 2));
|
||||
$('#timer').text(`(${elapsedTime} ms)`);
|
||||
$submitButton.prop('disabled', false);
|
||||
$submitButton.text('Submit');
|
||||
|
||||
if (data.image) {
|
||||
$('#previewImage').attr('src', data.image);
|
||||
$('#imagePreview').removeClass('hidden');
|
||||
|
||||
if (service === 'alpr') {
|
||||
$('#imagePreviewLabel')[0].textContent = 'Identified plate image:';
|
||||
}
|
||||
} else {
|
||||
updateFileName();
|
||||
}
|
||||
},
|
||||
error: function (xhr, status, error) {
|
||||
var endTime = Date.now();
|
||||
var elapsedTime = endTime - startTime;
|
||||
|
||||
var err = JSON.parse(xhr.responseText);
|
||||
$('#responseBox').text(JSON.stringify(err, null, 2));
|
||||
},
|
||||
complete: function () {
|
||||
$('#submitButton').prop('disabled', false);
|
||||
$('#loadingCircle').addClass('hidden');
|
||||
$('#timer').text(`(${elapsedTime} ms)`);
|
||||
$submitButton.prop('disabled', false);
|
||||
$submitButton.text('Submit');
|
||||
}
|
||||
});
|
||||
});
|
||||
});
|
||||
</script>
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user