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How to convert a PIL Image into a numpy array?
...
Open I as an array:
>>> I = numpy.asarray(PIL.Image.open('test.jpg'))
Do some stuff to I, then, convert it back to an image:
>>> im = PIL.Image.fromarray(numpy.uint8(I))
Filter numpy images with FFT, Python
If you want to do it explicitly for some reason, there are pil2arr...
How to embed a video into GitHub README.md?
...in the form of:
https://img.youtube.com/vi/<VIDEO ID>/maxresdefault.jpg
https://img.youtube.com/vi/<VIDEO ID>/hqdefault.jpg
Example:
[](https://youtu.be/T-D1KVIuvjA)
Result:
Use asciinema
If your use ca...
How can I quantify difference between two images?
... compare image to itself, there is no difference:
$ python compare.py one.jpg one.jpg
Manhattan norm: 0.0 / per pixel: 0.0
Zero norm: 0 / per pixel: 0.0
If we blur the image and compare to the original, there is some difference:
$ python compare.py one.jpg one-blurred.jpg
Manhattan norm: 926051...
将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...x函数。《UNIX Application Migration Guide》则提供了一种方法来转换Unix平台上的一些OS级的概念到windows上。实际上Cygwin下面也做了很多这样的转换。具体解决link问题的时候可以参考Cygwin本身的实现。
不过有些概念，比如安全权限方...
C++静态和多态，亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...t Base&)拷贝构造创建的一个Base对象，自动向上的强制类型转换使得基类拷贝构造函数可以引用一个子类对象），根据上述第3点，则b.foo()将按对象类型（Base）调用到Base::foo()，不产生多态行为。即，由于按值传递，在此处阻止了...
CSS Image size, how to fill, not stretch?
...
height: 100px;
background-image: url("http://i.stack.imgur.com/2OrtT.jpg");
background-size: cover;
background-repeat: no-repeat;
background-position: 50% 50%;
}
<div class="container"></div>
While cover will give you a scaled up image, contain will give you a ...
How to save a PNG image server-side, from a base64 data string
...ubstr($data, strpos($data, ',') + 1);
$type = strtolower($type[1]); // jpg, png, gif
if (!in_array($type, [ 'jpg', 'jpeg', 'gif', 'png' ])) {
throw new \Exception('invalid image type');
}
$data = str_replace( ' ', '+', $data );
$data = base64_decode($data);
if ($dat...
How to have jQuery restrict file types on upload?
I would like to have jQuery limit a file upload field to only jpg/jpeg, png, and gif. I am doing backend checking with PHP already. I am running my submit button through a JavaScript function already so I really just need to know how to check for the file types before submit or alert.
...
Convert RGBA PNG to RGB with PIL
I'm using PIL to convert a transparent PNG image uploaded with Django to a JPG file. The output looks broken.
7 Answers
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Getting the filenames of all files in a folder [duplicate]
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How can get specify extension to get .jpg files?
– Abc
Aug 22 '16 at 2:17
7
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