Code Of calculate Variance Of image[processing]

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C#

Can anybody Help me!
I Need Open Source And Not Class..

Posted 17-Aug-11 13:39pm

X-ahmad

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TRK3 17-Aug-11 20:44pm

Did you try Google?

I wasn't sure exactly what you were asking for, so I googled "variance of image" and got a number of links that included code.

Do you mean "variance" in the strictly mathematical sense, or something else?

I assume you are testing to see if two images are basically the same image, but what sort of variations do you want to tolerate before you call them different?

For example: What if it's the same image scaled down (or up) by 15%? Or what if it's the same image framed by something or shifted a few pixels? A simple variance algorithm will give tell you those are very different images. So if you want to catch those sort of similarities you are going to need something more sophisticated.

X-ahmad 17-Aug-11 21:24pm

Hii work implement The Fingerprint Application and need to segmentation all fingerPrint in cell[16*16] then calculate variance and normalized it.
can U help me in C#.net?
Thank U.

X-ahmad 19-Aug-11 14:17pm

Hi
i need all algorithm asked me!
because maybe fingerPrint Shifted Or Change scall in diffrent scan.
have You this Algorithm??

Sergey Alexandrovich Kryukov 17-Aug-11 20:48pm

"Open Source And Not Class" is called gibberish.
--SA

X-ahmad 18-Aug-11 7:24am

this algorithm split bitmap to 16*16 slice and calculate variance and in next step normalized it with variance,and it famous to "hong et al"

Sergey Alexandrovich Kryukov 18-Aug-11 22:12pm

It does not explain "Open Source And Not Class"...
--SA

Dr.Walt Fair, PE 17-Aug-11 21:43pm

You still haven't given enough information to figure out what it is you are having trouble with. Please explain what algorithm you need to use to segment the finger print, what format the image is in, and how you calculate the variance.

X-ahmad 18-Aug-11 9:15am

this algorithm split bitmap to 16*16 slice and calculate variance and in next step normalized it with variance,and it famous to "hong et al"

TRK3 18-Aug-11 18:46pm

OK, now that you explained this is a fingerprint recognition application, I googled "fingerprint hong et al" and it seems to me that the algorithm you are attempting to describe isn't really the best current algorithm for this.

Why not just google "fingerprint recognition software open source".

It looks like there are at least a half dozen links to open source implementations of fingerprint recognition algorithms.

I suggest you take a look at those and download one.

If you can't find one in C#, then either port it to C#, or just use it as is. It's probably easier to figure out how to call C++ code from your C# application then it is to port a complex algorithm like that.

X-ahmad 19-Aug-11 14:25pm

Do you have any information about OpenCV and How Use That???
becuse I found Open Source Project With this Topic But can't Use That,it have a complex code and very external attach File.

TRK3 19-Aug-11 14:33pm

Did you google OpenCV? There are plenty of links about it.

Why can't you use it? It has a BSD license, so there is not licensing restrictions.

If you found an Open Source project, why don't you download and build it as a first step.

If the project is active, you should be able to build it without too much trouble. You might have to install gcc and use that instead of VS, but you should still be able to do it without understanding the code at all.

Once you've got the code download and compiled, it should work without you having any understanding of it at all yet.

Then, one you've got a working example, you can look it over and figure out if you can just use it as is without understanding it, or if you need to borrow parts of it, or port it, or just use it as a reference for your own implementation.

You can always run the working code under a debugger and step through it to see what it is doing -- that's a very good way to learn about code that you can't otherwise understand.

X-ahmad 19-Aug-11 14:52pm

Thank's for Aim
i try it again...

i 5 year's Play With Programs language [pascal,turbo C++,C#.net,ASP,HTML] But this project Failed My ATTENTION
i download many source and webPage in Several Algorithm,if after few Paramorphic Not Arrive to Answer,left a code and Paramorphic another code!
my problem is,sourceless or excutive Project[open source]

TRK3 19-Aug-11 15:54pm

OK. Give it a try. Then if you run into specific problems with the project you can ask a new question about that (or if the project has a forum or method of containing the principal maintainers, you can ask the author of the code).

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