coco目標檢測資料集標註目標資訊採用的是資料格式是json，其內容本質是一種字典結構，字典堆疊和列表資訊內容維護。

coco裡面的id和類名字對應：總共80類，但id號到90！

coco_id_name_map={1: 'person', 2: 'bicycle', 3: 'car', 4: 'motorcycle', 5: 'airplane',
                   6: 'bus', 7: 'train', 8: 'truck', 9: 'boat', 10: 'traffic light',
                   11: 'fire hydrant', 13: 'stop sign', 14: 'parking meter', 15: 'bench',
                   16: 'bird', 17: 'cat', 18: 'dog', 19: 'horse', 20: 'sheep', 21: 'cow',
                   22: 'elephant', 23: 'bear', 24: 'zebra', 25: 'giraffe', 27: 'backpack',
                   28: 'umbrella', 31: 'handbag', 32: 'tie', 33: 'suitcase', 34: 'frisbee',
                   35: 'skis', 36: 'snowboard', 37: 'sports ball', 38: 'kite', 39: 'baseball bat',
                   40: 'baseball glove', 41: 'skateboard', 42: 'surfboard', 43: 'tennis racket',
                   44: 'bottle', 46: 'wine glass', 47: 'cup', 48: 'fork', 49: 'knife', 50: 'spoon',
                   51: 'bowl', 52: 'banana', 53: 'apple', 54: 'sandwich', 55: 'orange',
                   56: 'broccoli', 57: 'carrot', 58: 'hot dog', 59: 'pizza', 60: 'donut',
                   61: 'cake', 62: 'chair', 63: 'couch', 64: 'potted plant', 65: 'bed', 67: 'dining table',
                   70: 'toilet', 72: 'tv', 73: 'laptop', 74: 'mouse', 75: 'remote', 76: 'keyboard',
                   77: 'cell phone', 78: 'microwave', 79: 'oven', 80: 'toaster', 81: 'sink',
                   82: 'refrigerator', 84: 'book', 85: 'clock', 86: 'vase', 87: 'scissors',
                   88: 'teddy bear', 89: 'hair drier', 90: 'toothbrush'}
 

開啟json檔案：

    with open(json_path,'r') as load_f:
        load_dict = json.load(load_f)

裡面協議是這樣的，annotations下面是每一個box的標註資訊，包括分割的，當前框使用目標框，image_id，categogy_id。

因此要想獲得整個資料集資訊，必須遍歷整個box資訊，將其進行統計分配。