【目标检测】小脚本:数据集划分

2022-09-08 11:35:22 浏览数 (1)

需求内容

之前写了一篇【目标检测】YOLOv5跑通VOC2007数据集里面写了个脚本是将xml标注格式转换称Yolo格式,同时读取数据集划分。

在训练自己的数据时,我发现没有现成的数据集划分文件,于是就写了这个小脚本来读取文件名,并划分成train/val/test三个文件。

需求实现

完整脚本:

代码语言:javascript复制
import os
import random

img_path = './image/'
img_list = os.listdir(img_path)
train_ratio = 0.8  # 训练集比例
val_ratio = 0.1  # 验证集比例
shuffle = True  # 是否随机划分


def data_split(full_list, train_ratio, val_ratio, shuffle=True):
    n_total = len(full_list)
    train_set_num = int(n_total * train_ratio)
    val_set_num = int(n_total * val_ratio)
    if shuffle:
        random.shuffle(full_list)
    train_set = full_list[:train_set_num]
    val_set = full_list[train_set_num:(train_set_num   val_set_num)]
    test_set = full_list[(train_set_num   val_set_num):]
    return train_set, val_set, test_set


if __name__ == '__main__':
    train_set, val_set, test_set = data_split(img_list, train_ratio, val_ratio, shuffle=True)

    with open('train.txt', 'w') as f:
        for img_name in train_set:
            f.write(img_name.split('.png')[0]   'n')

    with open('val.txt', 'w') as f:
        for img_name in val_set:
            f.write(img_name.split('.png')[0]   'n')

    with open('test.txt', 'w') as f:
        for img_name in test_set:
            f.write(img_name.split('.png')[0]   'n')

读取图片数据:

划分后的数据:

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