Python 读取指定文件夹下的所有图像方法
(1)数据准备
数据集介绍:
数据集中存放的是1223幅图像,其中756个负样本(图像名称为0.1~0.756),458个正样本(图像名称为1.1~1.458),其中:"."前的标号为样本标签,"."后的标号为样本序号
(2)利用python读取文件夹中所有图像
''' Load the image files form the folder input: imgDir: the direction of the folder imgName:the name of the folder output: data:the data of the dataset label:the label of the datset ''' def load_Img(imgDir,imgFoldName): imgs = os.listdir(imgDir+imgFoldName) imgNum = len(imgs) data = np.empty((imgNum,1,12,12),dtype="float32") label = np.empty((imgNum,),dtype="uint8") for i in range (imgNum): img = Image.open(imgDir+imgFoldName+"/"+imgs[i]) arr = np.asarray(img,dtype="float32") data[i,:,:,:] = arr label[i] = int(imgs[i].split('.')[0]) return data,label
这里得到的data和label都是ndarray数据
data: (1223,1,12,12)
label:(1223,)
注:nddary数据类型是numpy提供的一个数据类型,即N-dimensional array,它弥补了python中array不支持多维的缺陷
(3)调用方式
craterDir = "./data/CraterImg/Adjust/" foldName = "East_CraterAdjust12" data, label = load_Img(craterDir,foldName)
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