PIL和cv2是python中两个常用的图像处理库，PIL一般是anaconda自带的，cv2是opencv的python版本。base64在网络传输图片的时候经常用到。

##PIL读取、保存图片方法from PIL import Imageimg = Image.open(img_path)img.save(img_path2) ##cv2读取、保存图片方法import cv2img = cv2.imread(img_path)cv2.imwrite(img_path2, img) ##图片文件打开为base64import base64 def img_base64(img_path): with open(img_path,"rb") as f: base64_str = base64.b64encode(f.read()) return base64_str

1、PIL和cv2转换

##PIL转cv2import cv2from PIL import Imageimport numpy as np def pil_cv2(img_path): image = Image.open(img_path) img = cv2.cvtColor(np.asarray(image),cv2.COLOR_RGB2BGR) return img ##cv2转PILimport cv2from PIL import Image def cv2_pil(img_path): image = cv2.imread(img_path) image = Image.fromarray(cv2.cvtColor(image,cv2.COLOR_BGR2RGB)) return image

2、PIL和base64转换

##PIL转base64import base64from io import BytesIO def pil_base64(image): img_buffer = BytesIO() image.save(img_buffer, format='JPEG') byte_data = img_buffer.getvalue() base64_str = base64.b64encode(byte_data) return base64_str ##base64转PILimport base64from io import BytesIOfrom PIL import Image def base64_pil(base64_str): image = base64.b64decode(base64_str) image = BytesIO(image) image = Image.open(image) return image

3、cv2和base64转换

##cv2转base64import cv2 def cv2_base64(image): base64_str = cv2.imencode('.jpg',image)[1].tostring() base64_str = base64.b64encode(base64_str) return base64_str ##base64转cv2import base64import numpy as npimport cv2 def base64_cv2(base64_str): imgString = base64.b64decode(base64_str) nparr = np.fromstring(imgString,np.uint8) image = cv2.imdecode(nparr,cv2.IMREAD_COLOR) return image

以上这篇python PIL/cv2/base64相互转换实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。