使用 PIL 打开多个图像

Question

I am using a python notebook. In it, I have code that creates images, and am using image.show() for debugging purposes. However, this has the disadvantage that I cannot name the image, since it has a temporary file name. I am then using image.save("name.png") to save the images with different names, and then using Image.open("name.png") to open it. However, when I do this, only the last image is actually opened. What do I need to do so that I can call Image.open on several images and they all open? For example if I do:

image = Image.fromarray( ... )
image.save("original.png")
Image.open("original.png")

image = Image.fromarray( ... )
image.save("reconstruction.png")
Image.open("reconstruction.png")

only "reconstruction.png" shows.

If I use Image.show() after each of them

image = Image.fromarray( ... )
image.show()

image = Image.fromarray( ... )
image.show()

it will work, but they will have a temporary name, which is meaningless, and if I end up with 7-8 open images I want an easy way to track what is what.

Answer 1

Image.show() is mainly for debugging use:

Displays this image. This method is mainly intended for debugging purposes.

On Unix platforms, this method saves the image to a temporary PPM file, and calls the xv utility.

On Windows, it saves the image to a temporary BMP file, and uses the standard BMP display utility to show it (usually Paint).

You can give a title parameter, but it doesn't show on Windows:

title – Optional title to use for the image window, where possible.

You can use different names for image variable to keep track of them inside Python:

image1 = Image.fromarray( ... )
image1.save("original.png")
Image1.open("original.png")

image2 = Image.fromarray( ... )
image2.save("reconstruction.png")
Image2.open("reconstruction.png")

image1.show("image1")
image2.show("image2")

Answer 2

Also another approach which I used within my IPython/Jupyter/Colab notebook was:

import requests
from IPython.display import Image
from IPython.display import display

img0 = Image("img0_path", width = 140) 
img1 = Image("img1_path", width = 140) 
img2 = Image("img2_path", width = 140) 
img3 = Image("img3_path", width = 140) 

display(img0,img1,img2,img3)