python PIL/cv2/base64相互转换实例_Python

python PIL/cv2/base64相互转换实例

2020-05-01 11:09二加三等于五 Python

今天小编就为大家分享一篇python PIL/cv2/base64相互转换实例，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧

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 Image

									img = Image.open(img_path)

									img.save(img_path2)

									##cv2读取、保存图片方法

									import cv2

									img = cv2.imread(img_path)

									cv2.imwrite(img_path2, img)

									##图片文件打开为base64

									import 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cv2

									import cv2

									from PIL import Image

									import 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PIL

									import cv2

									from 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base64

									import base64

									from 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PIL

									import base64

									from io import BytesIO

									from 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base64

									import cv2

									def cv2_base64(image):

									  base64_str = cv2.imencode('.jpg',image)[1].tostring()

									  base64_str = base64.b64encode(base64_str)

									  return base64_str 

									##base64转cv2

									import base64

									import numpy as np

									import 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