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How can I convert an RGB image into grayscale in Python?
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How about doing it with Pillow:
from PIL import Image
img = Image.open('image.png').convert('LA')
img.save('greyscale.png')
Using matplotlib and the formula
Y' = 0.2989 R + 0.5870 G + 0.1140 B
you could do:
import numpy as np
import matplotlib.pyplot as plt
import matpl...
How to extract img src, title and alt from html using php? [duplicate]
... that case it's better to split the process into two parts :
get all the img tag
extract their metadata
I will assume your doc is not xHTML strict so you can't use an XML parser. E.G. with this web page source code :
/* preg_match_all match the regexp in all the $html string and output everythi...
How can one display images side by side in a GitHub README.md?
...side by side if the images are not too wide.
<p float="left">
<img src="/img1.png" width="100" />
<img src="/img2.png" width="100" />
<img src="/img3.png" width="100" />
</p>
share
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How to close tag properly?
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<img src='stackoverflow.png' />
Works fine and closes the tag properly. Best to add the alt attribute for people that are visually impaired.
shar...
Convert SVG to image (JPEG, PNG, etc.) in the browser
... calls to output a png
var canvas = document.getElementById("canvas");
var img = canvas.toDataURL("image/png");
// do what you want with the base64, write to screen, post to server, etc...
});
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Convert RGBA PNG to RGB with PIL
...95/…). I had to convert the PNG to RGBA first and then slice it: alpha = img.split()[-1] then use that on the background mask.
– joehand
Nov 2 '12 at 0:56
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
Capture HTML Canvas as gif/jpg/png/pdf?
... has been revised:
var canvas = document.getElementById("mycanvas");
var img = canvas.toDataURL("image/png");
with the value in IMG you can write it out as a new Image like so:
document.write('<img src="'+img+'"/>');
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How do I combine a background-image and CSS3 gradient on the same element?
...an use this:
background-color: #444; // fallback
background: url('PATH-TO-IMG') center center no-repeat; // fallback
background: url('PATH-TO-IMG') center center no-repeat, -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
background: url('PATH-TO-IMG') center center no-repeat, -webkit...
CSS image resize percentage of itself?
I am trying to resize an img with a percentage of itself. For example, I just want to shrink the image by half by resizing it to 50%. But applying width: 50%; will resize the image to be 50% of the container element (the parent element which maybe the <body> for example).
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