Python PIL：将字节数组转换为图像
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PIL: Convert Bytearray to Image
提问by ato
I am trying to verify a bytearray with Image.openand Image.verify()without writing it to disk first and then open it with im = Image.open(). I looked at the .readfrombuffer()and .readfromstring()method, but there I need the size of the image (which I could only get when converting the bytestream to an image).
我正在尝试先将字节数组写入磁盘Image.open和Image.verify()不将其写入磁盘，然后使用im = Image.open(). 我查看了.readfrombuffer()and.readfromstring()方法，但在那里我需要图像的大小（只有在将字节流转换为图像时才能获得）。
My Read-Function looks like this:
我的读取函数如下所示：
def readimage(path):
bytes = bytearray()
count = os.stat(path).st_size / 2
with open(path, "rb") as f:
print "file opened"
bytes = array('h')
bytes.fromfile(f, count)
return bytes
Then as a basic test I try to convert the bytearray to an image:
然后作为基本测试，我尝试将 bytearray 转换为图像：
bytes = readimage(path+extension)
im = Image.open(StringIO(bytes))
im.save(savepath)
If someone knows what I am doing wrong or if there is a more elegant way to convert those bytes into an image that'd really help me.
如果有人知道我做错了什么，或者是否有更优雅的方法将这些字节转换为真正对我有帮助的图像。
P.S.: I thought I need the bytearray because I do manipulations on the bytes (glitch them images). This did work, but I wanted to do it without writing it to disk and then opening the imagefile from the disk again to check if it is broken or not.
PS：我认为我需要字节数组，因为我对字节进行了操作（对图像进行故障处理）。这确实有效，但我不想将其写入磁盘，然后再次从磁盘打开图像文件以检查它是否损坏。
Edit: All it gives me is a IOError: cannot identify image file
编辑：它给我的只是一个 IOError: cannot identify image file
采纳答案by Viktor Kerkez
If you manipulate with bytearrays, then you have to use io.BytesIO. Also you can read a file directly to a bytearray.
如果您使用 进行操作bytearrays，那么您必须使用io.BytesIO. 您也可以将文件直接读取到bytearray.
import os
import io
import Image
from array import array
def readimage(path):
count = os.stat(path).st_size / 2
with open(path, "rb") as f:
return bytearray(f.read())
bytes = readimage(path+extension)
image = Image.open(io.BytesIO(bytes))
image.save(savepath)
