制作自己的python版本的类CIFAR10数据集
关于python 版本的CIFAR10的数据格式,官网上已经介绍:
data – a 10000x3072 numpy array of uint8s. Each row of the array stores a 32x32 colour image. The first 1024 entries contain the red channel values, the next 1024 the green, and the final 1024 the blue. The image is stored in row-major order, so that the first 32 entries of the array are the red channel values of the first row of the image. labels – a list of 10000 numbers in the range 0-9. The number at index i indicates the label of the ith image in the array data.
因此,想要制作自己的数据集,只需要把data
, label
准备好就可以,另外,我们可以读取cifar10
存储好的文件,查看其数据格式,以data_batch_1
为例(可以通过cifar10_read.py
读取):
{'data': array([[ 59, 43, 50, ..., 140, 84, 72], [154, 126, 105, ..., 139, 142, 144], [255, 253, 253, ..., 83, 83, 84], ..., [ 71, 60, 74, ..., 68, 69, 68], [250, 254, 211, ..., 215, 255, 254], [ 62, 61, 60, ..., 130, 130, 131]], dtype=uint8), 'labels': [6, 9, 9, 4, 1, 1, 2, 7, 8, 3, 4, 7, 7, 2, 9, 9, 9, 3, 2, 6, 4, 3, 6, 6, 2, 6, 3, 5, 4, 0, 0, 9, 1, 3, 4, 0, 3, 7, 3, 3, 5, 2, 2, 7, 1, 1, 1, 2, 2, 0, 9, 5, 7, 9, 2, 2, 5, 2, 4, 3, 1, 1, 8, 2, 1, 1, 4, 9, 7, 8, 5, 9, 6, 7, 3, 1, 9, 0, 3, 1, 3, 5, 4, 5, 7, 7, ... , 9, 8, 9, 4, 4, 7, 1, 0, 4, 3, 6, 3, 9, 8, 3, 6, 8, 3, 6, 6, 2, 6, 7, 3, 0, 0, 0, 2, 5, 1, 2, 9, 2, 2, 1, 6, 3, 9, 1, 1, 5], 'batch_label': 'training batch 1 of 5', 'filenames': ['leptodactylus_pentadactylus_s_000004.png', 'camion_s_000148.png', 'tipper_truck_s_001250.png', ... , 'truck_s_000036.png', 'car_s_002296.png', 'estate_car_s_001433.png', 'cur_s_000170.png']}
很明显,python版本存储成了一个dict,其中key包括:
data, 存放图像数据文件,是一个nx3072的数组;
labels, 存放图像对应的label,是一个nx1的数组;
batch_label, 说明信息;
filenames, 文件名列表。
详细的代码内容,可以查看实现代码,另外demo.py中提供了测试数据,这里把读取的文件结果输出:
{'data': array([[255, 255, 255, ..., 255, 255, 255], [255, 255, 255, ..., 255, 255, 255]], dtype=uint8), 'label': [0, 1], 'batch_label': 'training batch 0 of 1', 'filenames': ['a.png', 'b.png']}
跟官方数据的输出格式一致,虽然没有训练测试,但是理论上应该没问题,大家在测试的过程中,如果遇到问题,欢迎指出。