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Checking images for similarity with OpenCV
...r pictures the sum will return 1:
In[1]: np.sum(picture1_norm**2)
Out[1]: 1.0
2) If they aren't similar, you'll get a value between 0 and 1 (a percentage if you multiply by 100):
In[2]: np.sum(picture2_norm*picture1_norm)
Out[2]: 0.75389941124629822
Please notice that if you have colored pictu...
How do I iterate over an NSArray?
...; i++) {
// add number to c array
cArray[i] = random() * 1.0f/(RAND_MAX+1);
// add number to NSArray
NSNumber *number = [[NSNumber alloc] initWithFloat:cArray[i]];
[nsArray addObject:number];
[number release];
}
}
// callback for when ...
Is there any advantage of using map over unordered_map in case of trivial keys?
... I'm quite sure that memory-wise it is the opposite. Assuming the default 1.0 load factor for an unordered container: you have one pointer per element for the bucket and one pointer per element for the next-element-in-bucket, therefore you end up with two pointers plus data per each element. For an...
Android custom dropdown/popup menu
...eate a folder named “menu” in the “res” folder.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/search"
android:icon="@android:drawable/ic_menu_search"
android:title=...
What is the preferred/idiomatic way to insert into a map?
... for(unsigned long it = 0; it < 100;it++) {
m_vec[it] = 1.0;
}
}
Widget(double el) {
m_vec.resize(100);
for(unsigned long it = 0; it < 100;it++) {
m_vec[it] = el;
}
}
private:
std::vector<double> m_vec;
};
in...
Android: Difference between Parcelable and Serializable?
... 16
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-andro...
Android ListView with different layouts for each row
...now create a listview inside mainactivity.xml
like this
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas...
Make Iframe to fit 100% of container's remaining height
...to use table. Check this out:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<style>
*{margin:0;padding:0}
html, body {height:100%;width:...
How does the Java 'for each' loop work?
...ame, String s_bTestName) {
long lDiff = -1;
double dPct = -1.0;
String sFaster = null;
if(l_aDuration > l_bDuration) {
lDiff = l_aDuration - l_bDuration;
dPct = 100.00 - (l_bDuration * 100.0 / l_aDuration + 0.5);
sFaster = "B";
...
Simple explanation of clojure protocols
... Clojure itself.
Clojure has actually already had Protocols since version 1.0: Seq is a Protocol, for example. But until 1.2, you couldn't write Protocols in Clojure, you had to write them in the host language.
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