问题描述
我想使用Python Pillow库以jp2("JPEG 2000")格式保存16位灰度级数组.
I would like to use the Python Pillow library to save 16 bit gray scale arrays in the jp2 ("JPEG 2000") format.
在尝试在Windows计算机上安装所需的库OpenJPEG时遇到了麻烦. 文档不太清楚...但是我认为我需要下载Win64二进制文件，然后将它们放在我的路径上(我这样做了).
I have hit a brick wall in trying to install the required library OpenJPEG on my Windows machine. The documentation is not very clear... but I assumed that I needed to download the Win64 binaries and simply put them on my path ( which I did).
这样做，在Windows的Anaconda 4.3.0中使用Pillow 4.0.0时，仍然出现以下错误.
That done, I am still getting the following error when using Pillow 4.0.0 in Anaconda 4.3.0 on Windows.
IOError: encoder jpeg2k not available
任何人都成功地使用Pillow来读写JPEG 2000文件，我肯定会喜欢一些技巧.
Anyone out there successfully used Pillow to write and read JPEG 2000 files, I would sure appreciate some tips.
以下是失败的代码:
import PIL
import numpy as np
arr = np.ones(dtype=np.uint16, shape=(100, 100))
im = PIL.Image.fromarray(arr)
im.save('arr.jp2')
推荐答案
我刚刚使用来自此处.我选择了Pillow-4.0.0.win-amd64-py3.5.exe.在安装过程中，它发现了conda的python，并正确选择了安装位置(安装在根环境中).
I've just installed Pillow with an installer from here. I chose Pillow-4.0.0.win-amd64-py3.5.exe. During install it found conda's python and properly chose where to install (it installed to a root environment).
代码进行测试:
from PIL import Image
import numpy as np
arr = np.ones(dtype=np.uint16, shape=(100,100))
im = Image.fromarray(arr)
im.save('test.jp2')
请注意，保存的文件的速度为8 bpp.
Note, that saved file has 8 bpp.
这篇关于如何在Windows上安装OpenJPEG并将其与Pillow结合使用?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！