scikit-image将图像保存到字节串 [英] scikit-image save image to a bytestring

问题描述

我正在使用 scikit-image 来读取图像:

I'm using scikit-image to read an image:

img = skimage.io.imread(filename)

对img做一些操作后，我想将其保存到内存文件中(例如

After doing some manipulations to img, I'd like to save it to an in-memory file (a la StringIO) to pass off to another function, but it looks like skimage.io.imsave requires a filename, not a file handle.

如果可能的话，我想避免打磁盘(imsave然后从另一个映像库中读取).有什么好方法可以使imsave(或其他一些对scikit-image友好的功能)与StringIO一起使用?

I'd like to avoid hitting the disk (imsave followed by read from another imaging library) if at all possible. Is there a nice way to get imsave (or some other scikit-image-friendly function) to work with StringIO?

推荐答案

更新:2020-05-07

我们现在建议使用imageio库进行图像读取和写入.另外，在Python 3中，StringIO更改为BytesIO:

We now recommend using the imageio library for image reading and writing. Also, with Python 3, StringIO changes to BytesIO:

from io import BytesIO
import imageio

buf = BytesIO()
imageio.imwrite(buf, image, format='png')

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scikit-image将图像存储为numpy数组，因此可以使用诸如matplotlib的程序包来实现:

---

scikit-image stores images as numpy arrays, therefore you can use a package such as matplotlib to do so:

import matplotlib.pyplot as plt
from StringIO import StringIO

s = StringIO()

plt.imsave(s, img)

这可能值得添加为skimage.io.imsave的默认行为，因此，如果您愿意，也可以在 https://github.com/scikit-image/scikit-image .

This may be worth adding as default behaviour to skimage.io.imsave, so if you want you can also file an issue at https://github.com/scikit-image/scikit-image.

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