Python怎么将bmp格式的图片批量转成jpg

# *_* coding : UTF-8 *_*# 开发人员： csu·pan-_-||# 开发时间： 2020/11/21 12:40# 文件名称： bmp_to_jpg.py# 开发工具： PyCharm# 功能描述： 将bmp格式的图片批量转成jpgimport osimport cv2# 图片的路径bmp_dir = r'E:Projectsmp'jpg_dir = r'E:Projectsjpg'filelists = os.listdir(bmp_dir)for i,file in enumerate(filelists):    # 读图，-1为不改变图片格式，0为灰度图      img = cv2.imread(os.path.join(bmp_dir,file),-1)    newName = file.replace('.bmp','.jpg')    cv2.imwrite(os.path.join(jpg_dir,newName),img)    print('第%d张图：%s'%(i+1,newName))

import osfrom PIL import Imagejson_dir = r"D:BMP2PNG"label_names = os.listdir(json_dir)label_dir = []for filename in label_names:    label_dir.append(os.path.join(json_dir,filename))for i,filename in enumerate(label_dir):    im = Image.open(filename)  # open ppm file    newname = label_names[i].split('.')[0] + '.png'  # new name for png file    im.save(os.path.join(json_dir,newname))

import osfrom PIL import Imagejson_dir = r"D:BMP2JPG"label_names = os.listdir(json_dir)label_dir = []for filename in label_names:    label_dir.append(os.path.join(json_dir,filename))for i,filename in enumerate(label_dir):    im = Image.open(filename)  # open ppm file    newname = label_names[i].split('.')[0] + '.jpg'  # new name for png file    im.save(os.path.join(json_dir,newname))

import osfrom PIL import Imageimport tqdmdef bmp2png(file_dir):    for root, dirs, files in os.walk(file_dir):  # 获取所有文件        # for file in files:  # 遍历所有文件名        for idx,file in enumerate(tqdm.tqdm(files)):            if os.path.splitext(file)[1] == '.bmp':   # 指定尾缀  ***重要***                im = Image.open(os.path.join(root, file))  # open img file                newname = file.split('.')[0] + '.png'  # new name for png file                im.save(os.path.join(root, newname))  # 转为pngbmp2png(r"D:数据集20221105-18")

import osfrom PIL import Imageimport tqdmdef bmp2png(file_dir):    for root, dirs, files in os.walk(file_dir):  # 获取所有文件        # for file in files:  # 遍历所有文件名        for idx,file in enumerate(tqdm.tqdm(files)):            if os.path.splitext(file)[1] == '.bmp':   # 指定尾缀  ***重要***                newname = file.split('.')[0] + '.png'  # new name for png file                if(os.path.exists(os.path.join(root, newname))):                    os.remove(os.path.join(root, newname))                os.rename(os.path.join(root, file),os.path.join(root, newname))                print(os.path.join(root, file))bmp2png(r"D:PUCP数据集20221105-18")