Issue
Say I use the following method to create a three images. I then want to combine these three images into a GIF & display the GIF (jupyter notebook, python 3). All the methods I've seen online & stackoverflow for creating GIFs include saving the images as files & then importing them. For instance, this thread. But is there a way to just generate a gif without having to save/import image files? So, in the following code, using three versions of the im=Image.fromarray(arr.astype('uint8')) generated image to create a gif on the spot?
import numpy as np
from PIL import Image
arr = np.random.randint(low = 0, high = 255, size = (300, 300, 3))
im = Image.fromarray(arr.astype('uint8'))
im.show()
Solution
I guess you need something like this. GIF is an image file type so you have to save it to have one.
#! /usr/bin/env python3
import numpy as np
from PIL import Image
im = []
for n in range(20):
arr = np.random.randint(low = 0, high = 255, size = (300, 300, 3))
im.append(Image.fromarray(arr.astype('uint8')))
im[0].save('im.gif', save_all=True, append_images=im[1:], optimize=False, duration=200, loop=0)
#im[0].show()
Then open im.gif with a browser or some app that can show animated GIFs.
If you really don't want to save the GIF but just show it, you can do something like this
#! /usr/bin/env python3
import base64
import io
import numpy as np
from PIL import Image
from viaduc import Viaduc
im = []
for n in range(20):
arr = np.random.randint(low = 0, high = 255, size = (300, 300, 3))
im.append(Image.fromarray(arr.astype('uint8')))
buffer = io.BytesIO()
im[0].save(buffer, format='GIF', save_all=True, append_images=im[1:], optimize=False, duration=200, loop=0)
buffer.seek(0)
data_uri = base64.b64encode(buffer.read()).decode('ascii')
class Presentation(Viaduc.Presentation):
width = 300
height = 300
title = 'gif'
html = '''
<!DOCTYPE html>
<head>
{{bootstrap_meta}} {{bootstrap_css}}
<title>{{title}}</title>
</head>
<body>
<img src="data:image/gif;base64,''' + data_uri + '''">
{{bootstrap_js}}
</body>
</html>
'''
if __name__ == '__main__':
Viaduc(presentation=Presentation())
Answered By - Diego Torres Milano Answer Checked By - Timothy Miller (PHPFixing Admin)
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