import os
import json
import cv2
import numpy as np

input_folder = r"G:\python_ws_g\data\arcout"   # 你的 JSON + 图片输入文件夹
output_folder = r"G:\python_ws_g\data\arcshow"  # 保存带标注图片的文件夹

MAX_WIDTH = 1280
MAX_HEIGHT = 720

def resize_to_fit(image, max_width=MAX_WIDTH, max_height=MAX_HEIGHT):
    h, w = image.shape[:2]
    scale = min(max_width / w, max_height / h, 1.0)  # 只缩小不放大
    new_size = (int(w * scale), int(h * scale))
    resized_image = cv2.resize(image, new_size, interpolation=cv2.INTER_AREA)
    return resized_image

def visualize_and_save(input_folder, output_folder):
    os.makedirs(output_folder, exist_ok=True)

    files = [f for f in os.listdir(input_folder) if f.endswith('.json')]
    files.sort()

    for json_file in files:
        json_path = os.path.join(input_folder, json_file)
        with open(json_path, 'r', encoding='utf-8') as f:
            data = json.load(f)

        image_path = os.path.join(input_folder, data["imagePath"])
        if not os.path.exists(image_path):
            print(f"图像不存在：{image_path}")
            continue

        image = cv2.imread(image_path)

        for shape in data["shapes"]:
            label = shape["label"]
            points = shape["points"]
            pts = np.array(points, dtype=np.int32).reshape((-1, 1, 2))

            color = (0, 255, 0)
            cv2.polylines(image, [pts], isClosed=True, color=color, thickness=2)
            x0, y0 = pts[0][0]
            cv2.putText(image, label, (x0, y0 - 5), cv2.FONT_HERSHEY_SIMPLEX, 0.6, color, 1)

        resized_image = resize_to_fit(image)

        base_name = os.path.splitext(json_file)[0]
        save_path = os.path.join(output_folder, base_name + ".jpg")
        cv2.imwrite(save_path, resized_image)
        print(f"保存图片: {save_path}")

if __name__ == "__main__":
    visualize_and_save(input_folder, output_folder)