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Absolute vs relative URLs
...bug.
Let's say you have used absolute URL everywhere in your code like <img src="http://yourdomain.com/images/example.png">. Now what will happen when you are going to:
switch to another scheme (e.g. http -> https)
switch domain names (test.yourdomain.com -> yourdomain.com)
In the firs...
Programmatically generate video or animated GIF in Python?
...tps://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html#gif
img, *imgs = [Image.open(f) for f in sorted(glob.glob(fp_in))]
img.save(fp=fp_out, format='GIF', append_images=imgs,
save_all=True, duration=200, loop=0)
See docs: https://pillow.readthedocs.io/en/stable/handbook/i...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...some modifications to the squares demo present in OpenCV and the resulting C++ code below is able to detect a sheet of paper in the image:
void find_squares(Mat& image, vector<vector<Point> >& squares)
{
// blur will enhance edge detection
Mat blurred(image);
medianB...
if a ngSrc path resolves to a 404, is there a way to fallback to a default?
...r an error loading an image and to replace the src. (Plunker)
Html:
<img ng-src="smiley.png" err-src="http://google.com/favicon.ico" />
Javascript:
var app = angular.module("MyApp", []);
app.directive('errSrc', function() {
return {
link: function(scope, element, attrs) {
el...
c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等 - C/C++ -...
c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等c c++如何判断指针无效？不仅仅是NULL的判断，有时由于指针释放没有赋NULL，指针会变成野指针或诸如0xcccccccc,0xfeeefeee形式的无效指针，...c/c++如何判断指针无效？不仅仅是N...
Extracting text OpenCV
...se note that I'm using a scaled down version of the image for processing.
c++ version
The MIT License (MIT)
Copyright (c) 2014 Dhanushka Dangampola
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), t...
各编程语言读写文件汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...lude <string.h>
int main(int argc, char* argv[])
{
// 获取文件的指针
FILE *fp = fopen("test.txt", "r");
// 把指针移动到文件的结尾，使用ftell获取文件长度
fseek(fp, 0 ,SEEK_END);
int len = ftell(fp);
// 定义数组长度
char *pBuf = new char[len + 1];
...
Preloading CSS Images
...th:0; height:0; overflow:hidden; z-index:-1; // hide images
content:url(img1.png) url(img2.png) url(img3.gif) url(img4.jpg); // load images
}
Demo
it's better to use a sprite image to reduce http requests...(if there are many relatively small sized images) and make sure the images are hosted ...
How to position text over an image in css
...bold;
left: 150px;
top: 350px;
}
<div id="container">
<img id="image" src="http://www.noao.edu/image_gallery/images/d4/androa.jpg" />
<p id="text">
Hello World!
</p>
</div>
...
How can I get a web site's favicon?
...
Updated 2020
Here are three services you can use in 2020 onwards
<img height="16" width="16" src='https://icons.duckduckgo.com/ip3/www.google.com.ico' />
<img height="16" width="16" src='http://www.google.com/s2/favicons?domain=www.google.com' />
<img height="16" width="16" sr...