Surface analysis (Roughness and peak points)using 2D array

[Nghtcrwlr]

I am  having a 2D array of complex numbers as a result of some kind of transformation of an original image. I need to find surface characteristics like roughness, peak points  from these values. How is it possible? Can anyone suggest a method or somethin like that?

thnx

[BerndF]

Hi Nghtcrwlr,

the Vision Development Module can easily perform analysis functions like the ones you desire. It works with various development enviroments (LabVIEW, CVI, .net), the actual version can be found here (30 day trial version).

Regards,
Bernd

[elset191]

I've done a similar thing finding peaks using the Threshold Peak Detector.vi

[Nghtcrwlr]

Hello bernd

Actually what i need to find is: I am having an image. I performed 2DFourier Transform of the image. Is it possible to find where the edges are with the help of these fourier coefficients?

thn x

[BerndF]

Hi Nghtcrwlr,

which development enviroment are you using? As stated in my previous post the Vision Development Module implements the functionality of finding edges. You can find an example of an algorith that is capable of finding edges using 2D convolution here. This example does not require the Vision Development Module.

Regards,
Bernd

[Nghtcrwlr]

Hello Bernd

I am using LabVIEW 8.2. I have already seen the algorith to detect edges using convolution. But i need to find some kind of property between fourier coefficient and high edges. I would rather like not to use any development modules like  Vision Development Module .

Thnxx

[BerndF]

Hi Nghtcrwlr,

hmm, sorry, no idea how this algorithm would have to look like. I will check if I can find some more information....

[Nghtcrwlr]

Hello BerndF

Thanks... that wud be very nice if u cud give some information.