文章目录
1、处理单个文件或文件夹下所有图片2、读取gif格式图片3、完整的读取图片注程对于不同格式的图片，我们需要写一个都可以处理所有格式的图片,
1、处理单个文件或文件夹下所有图片
以下代码img_file可以是单张图片路径或者是存放图片的文件夹，返回图片列表
import osimport imghdrdef get_image_file_list(img_file):imgs_lists = []if img_file is None or not os.path.exists(img_file):raise Exception("not found any img file in {}".format(img_file))img_end = {'jpg', 'bmp', 'png', 'jpeg', 'rgb', 'tif', 'tiff', 'gif', 'GIF','webp','ppm'}if os.path.isfile(img_file) and imghdr.what(img_file) in img_end:imgs_lists.append(img_file)elif os.path.isdir(img_file):for single_file in os.listdir(img_file):file_path = os.path.join(img_file, single_file)if os.path.isfile(file_path) and imghdr.what(file_path) in img_end:imgs_lists.append(file_path)if len(imgs_lists) == 0:raise Exception("not found any img file in {}".format(img_file))imgs_lists = sorted(imgs_lists)return imgs_lists
2、读取gif格式图片
对于gif格式图片，需要特别代码来处理,以下为处理代码
import cv2import osdef check_and_read_gif(img_path):if os.path.basename(img_path)[-3:] in ['gif', 'GIF']:gif = cv2.VideoCapture(img_path)ret, frame = gif.read()if not ret:print("Cannot read {}. This gif image maybe corrupted.")return None, Falseif len(frame.shape) == 2 or frame.shape[-1] == 1:frame = cv2.cvtColor(frame, cv2.COLOR_GRAY2RGB)imgvalue = frame[:, :, ::-1]#to BGRreturn imgvalue, Truereturn None, False
如果读取成功，返回图片ndarray(numpy)和True,否则是None,False
3、完整的读取图片注程
import osimport cv2import imghdrdef get_image_file_list(img_file):imgs_lists = []if img_file is None or not os.path.exists(img_file):raise Exception("not found any img file in {}".format(img_file))img_end = {'jpg', 'bmp', 'png', 'jpeg', 'rgb', 'tif', 'tiff', 'gif', 'GIF','webp','ppm'}if os.path.isfile(img_file) and imghdr.what(img_file) in img_end:imgs_lists.append(img_file)elif os.path.isdir(img_file):for single_file in os.listdir(img_file):file_path = os.path.join(img_file, single_file)if os.path.isfile(file_path) and imghdr.what(file_path) in img_end:imgs_lists.append(file_path)if len(imgs_lists) == 0:raise Exception("not found any img file in {}".format(img_file))imgs_lists = sorted(imgs_lists)return imgs_listsdef get_image_file_list(img_file):imgs_lists = []if img_file is None or not os.path.exists(img_file):raise Exception("not found any img file in {}".format(img_file))img_end = {'jpg', 'bmp', 'png', 'jpeg', 'rgb', 'tif', 'tiff', 'gif', 'GIF','webp','ppm'}if os.path.isfile(img_file) and imghdr.what(img_file) in img_end:imgs_lists.append(img_file)elif os.path.isdir(img_file):for single_file in os.listdir(img_file):file_path = os.path.join(img_file, single_file)if os.path.isfile(file_path) and imghdr.what(file_path) in img_end:imgs_lists.append(file_path)if len(imgs_lists) == 0:raise Exception("not found any img file in {}".format(img_file))imgs_lists = sorted(imgs_lists)return imgs_listsif __name__=="__main__":image_file_list = get_image_file_list(image_dir)valid_image_file_list = []img_list = []for image_file in image_file_list:img, flag = check_and_read_gif(image_file)if not flag:img = cv2.imread(image_file)if img is None:print("error in loading image:{}".format(image_file))continuevalid_image_file_list.append(image_file)img_list.append(img)#do something to the img
以上代码需要输入image_dir，可以是一个文件夹或都是单张图片。返回的valid_image_file_list是存放所有合格的图片路径，img_list存放所有合格图片的ndarray(numpy).
