如何使用python/PIL将图像存储到Redis中 [英] how to store an image into redis using python / PIL

问题描述

我正在使用python和图像模块(PIL)处理图像.

I'm using python and the Image module(PIL) to process images.

我想将图像对象的原始位流存储到redis，以便其他人可以使用nginx& httpredis.

I want to store the raw bits stream of the image object to redis so that others can directly read the images from redis using nginx & httpredis.

所以，我的问题是如何获取Image对象的原始位并将其存储到Redis中.

so, my question is how to get the raw bits of an Image object and store it into redis.

推荐答案

使用PIL 1.1.7，redis-2.7.2 pip模块和redis-2.4.10，我可以使它工作:

Using PIL 1.1.7, redis-2.7.2 pip module, and redis-2.4.10 I was able to get this working:

import Image
import redis
import StringIO

output = StringIO.StringIO()
im = Image.open("/home/cwgem/Pictures/portrait.png")
im.save(output, format=im.format)

r = redis.StrictRedis(host='localhost')
r.set('imagedata', output.getvalue())
output.close()

我发现Image.tostring不可靠，因此此方法使用StringIO使字符串看起来像是文件.需要format=im.format是因为StringIO没有扩展名".然后，我通过执行以下操作测试了图像数据是否已保存:

I found that Image.tostring was not reliable, so this method uses StringIO to make a string appear to be a file. The format=im.format is needed because StringIO doesn't have an "extension". I then tested the image data was saved okay by doing:

redis-cli --raw get 'imagedata' >test.png

并确认我得到了一张图片.

and verifying I got back an image.

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