关键点标注【json转mat】 python

json中的样子：

{ "version": "4.5.7", "flags": {}, "shapes": [ { "label": "wood", "points": [ [ 739.3162393162394, 482.0512820512821 ] ], "group_id": null, "shape_type": "point", "flags": {} }, { "label": "wood", "points": [ [ 758.1196581196582, 458.11965811965814 ] ], "group_id": null, "shape_type": "point", "flags": {} },], "imagePath": "..\\img\\141.jpg", "imageData": " .......图片的base64编码，非常长........ ", "imageHeight": 1080, "imageWidth": 1920 }

【关键点标注【json转mat】】重要的信息就是里面的points坐标，其他的都用不到。提取方法如下：

import json import numpy as np import scipy.io as sio import scipy.io as sio import matplotlib.pyplot as plt import shutil import os path = 'D:/test/wood/yi' files = os.listdir(path) for name in files: if name.endswith('.json'):print(name)fp =open(os.path.join(path, name), 'r') json_data = https://www.it610.com/article/json.load(fp) points_data= json_data['shapes']points = [] for point in points_data: points.append(point['points'][0])sio.savemat(os.path.join('./mat', name.replace('.json','.mat')), {'annPoints':points, 'num':len(points)})