Implementing Gaussian Filter

[y_m_h]

Hi All,

In the surface roughness measurement, the measured value will contain waviness characteristic( see pic before_filter). I would  like to filter the measured value with highpassfilter with certain cutofffrequency., so that it wont have any waviness effect (see pic after_filter). FYI I never learn or study about filter, so I am new in this filter thingy.

With the Wind_HPF/Wind_LPF and also Convolve-Function, it has worked well. The problem is I wanted to use Gaussian Filter. I am using CVI /.1 Evaluation Version and I didn't find any built in function for Gaussian filter.Anyone could give me any explanation?I would really appreciate it if anyone could help me or give me tips on how to implement Gaussian Filter in CVI 7.1

Best Regards

Yusree

[lvrat]

Here is a C++ code to write Gaussian Filter and apply on a image. Take a look, likely the concept should be same.

Gaussian Filter function in CVI does not seem to exsist so running evalutaion copy is not effecting it.

[UM]

Hello Yusree,

there are several Gaussian-functions available in the current LabWindows/CVI 2010 version.
You can check the Gaussian-functions in the LabWindows/CVI Help online.

If you see the function fit, you can test it with a CVI eval version.
Find attached the links.

LabWindows/CVI Help
http://digital.ni.com/manuals.nsf/websearch/9B1912B3AFF8067A862577F90061D682

NI LabWindows™/CVI 2010 Evaluation Download
https://lumen.ni.com/nicif/us/evalcvi/content.xhtml

Regards
Ulrich