Convert PIL Image to byte array?

忘是亡心i 2022-02-24 11:36 197阅读 0赞

import io

img = Image.open(fh, mode=‘r’)  
roiImg = img.crop(box)

imgByteArr = io.BytesIO()  
roiImg.save(imgByteArr, format=‘PNG’)  
imgByteArr = imgByteArr.getvalue()  
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2.  
from PIL import Image  
import io

# I don’t know what Python version you’re using, so I’ll try using Python 3 first #

try:  
import urllib.request as urllib  
except ImportError:  
\# You are using Python 2 it turns out  
import urllib

def my\_func(filename, ext):  
\# Get the image from the URL  
im = Image.open(urllib.urlopen(filename))

fp = io.BytesIO()
    format = Image.registered_extensions()['.'+ext]
    im.save(fp, format)
    return fp.getvalue()

jpg\_bin = my\_func(“[http://p1.pstatp.com/list/300x196/pgc-image/152923179745640a81b1fdc.webp][http_p1.pstatp.com_list_300x196_pgc-image_152923179745640a81b1fdc.webp]”, “jpg”)  
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3.  
import io  
from PIL import Image \# 注意我的Image版本是pip3 install Pillow==4.3.0  
import requests

res = requests.get(‘[http://images.xxx.com/-7c0dc4dbdca3.webp][http_images.xxx.com_-7c0dc4dbdca3.webp]’, stream=True) \# 获取字节流最好加stream这个参数,原因见requests官方文档

byte\_stream = io.BytesIO(res.content) \# 把请求到的数据转换为Bytes字节流(这样解释不知道对不对，可以参照[廖雪峰][Link 1]的教程看一下)

roiImg = Image.open(byte\_stream) \# Image打开Byte字节流数据

imgByteArr = io.BytesIO() \# 创建一个空的Bytes对象

roiImg.save(imgByteArr, format=‘PNG’) \# PNG就是图片格式，我试过换成JPG/jpg都不行

imgByteArr = imgByteArr.getvalue() \# 这个就是保存的图片字节流

# 下面这一步只是本地测试， 可以直接把imgByteArr，当成参数上传到七牛云 #

with open("./abc.png", “wb”) as f:  
f.write(imgByteArr)

[http_p1.pstatp.com_list_300x196_pgc-image_152923179745640a81b1fdc.webp]: http://p1.pstatp.com/list/300x196/pgc-image/152923179745640a81b1fdc.webp
[http_images.xxx.com_-7c0dc4dbdca3.webp]: http://images.xxx.com/-7c0dc4dbdca3.webp
[Link 1]: https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/001431918785710e86a1a120ce04925bae155012c7fc71e000