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How can I measure the similarity between two images? [closed]
...ts with homogeneous coloring it will still work pretty well.)
Anyway, the idea is the compute the normalized dot-product of the two matrices.
C = sum(Pij*Qij)^2/(sum(Pij^2)*sum(Qij^2)).
This formula is actually the "cosine" of the angle between the matrices (wierd).
The bigger the similarity (let...
How to implement an abstract class in ruby?
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This is more like an interface actually but I get the idea. Thanks.
– Chirantan
Oct 8 '09 at 9:15
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How can I make a .NET Windows Forms application that only runs in the System Tray?
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Thread.Sleep is a bad idea: you'll end up using more CPU and battery than if you just did Application.Run like you're meant to.
– Sneftel
Jun 18 at 10:51
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Preview an image before it is uploaded
...s is. Works in IE7, IE8, FF and Chrome. Please test in IE9 and report.
The idea of IE preview was found here:
http://forums.asp.net/t/1320559.aspx
http://msdn.microsoft.com/en-us/library/ms532969(v=vs.85).aspx
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Where to store global constants in an iOS application?
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I agree #define is a bad idea, I just wanted to correct the error he made that it will create multiple objects. Also, pointer equality can't be relied on even for constants. It might be loaded from NSUserDefaults or something. Always use isEqual:.
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UIView bottom border?
...rors either and I checked that all the functions and properties exist. Any ideas?
– Apollo
Aug 15 at 11:45
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Returning value from Thread
...ead is usually poor style. Indeed extending classes unnecessarily is a bad idea. I notice you run method is synchronised for some reason. Now as the object in this case is the Thread you may interfere with whatever Thread uses its lock for (in the reference implementation, something to do with join,...
Inputting a default image in case the src attribute of an html is not valid?
...ently saw Vitaly Friedman demo a great CSS solution I wasn't aware of. The idea is to apply the content property to the broken image. Normally :after or :before do not apply to images, but when they're broken, they're applied.
<img src="nothere.jpg">
<style>
img:before {
content: ' ...
CSS scrollbar style cross browser [duplicate]
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Everyone would like it. The single smart idea coming from the IE era ?
– Ben
Jan 15 '14 at 16:36
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Can't install RMagick 2.13.1. Can't find MagickWand.h.
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You are a master. I have no idea why this works, but I'm glad it did.
– jayp
Mar 13 '17 at 0:43
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