Filter and Surface Parameters Menu

The 'Filter and Surface Parameters' menu displays the filter and surface parameter calculation interface which allows the user to filter a profile and calculate surface parameters. To filter a profile, the user has to do the following:

1. On the right menu, select the Filter Type. Under that is Filter label select the Method used to filter a profile. If the user selects Gaussian filter, there is an option where the user can select a width for the Gaussian window used in the calculation.
2. Select a long cut off wavelength on the drop down menu.
3. If a short wavelength needs to be removed from the profile, the 'Short Cutoff' has to be checked, and then the value of the short cutoff length must be selected.
4. Click 'Calculate' button below the Short Cutoff label to filter the profile .

The result shows two plots on a screen. The first plot shows a total profile, a least-squares-removed profile, or a primary profile along with a waviness profile. The second plot shows the roughness profile.

This picture shows the Filter screen. It shows an example of how the sinusoidal profile was filtered using Gaussian filter with convolution method at 0.8 mm cutoff. The picture also displays roughness and waviness profile.

To calculate surface parameters:

1. Select an option indicating how surface parameters will be calculated. If the user selects the calculation based on given sampling lengths, the user must enter the number of sampling lengths.
2. Select which parameters are to be included in the analysis. If the user selects the Sm parameter, he/she has to enter values for height discrimination and spacing discrimination.
3. If uncertainties need to be included in the calculations, the 'Calculate Uncertainty' must be checked and values for Uncertainty of x and z coordinates have to be entered.
4. Click on the 'Calculate' button below Spacing Discrimination label to calculate surface parameters.

The results of calculated surface parameters for waviness, roughness, total profile or primary profile are shown in a table.


To download analysis data:
1. Click on the floppy disk icon and the Save dialog will display. It will ask the user where a zip file will be saved.
2. When the zip file is opened, the user will see data files in XML, DTD, and SDF data format.

This picture shows the Filter screen. It shows an example of how the sinusoidal profile was filtered using Gaussian filter with convolution method at 0.8 mm cutoff. The picture also displays roughness and waviness profile along with their calculated surface parameters.  

This picture shows the Filter screen. It shows an example of how the sinusoidal profile was filtered using Gaussian filter with convolution method at 0.8 mm cutoff. The picture also displays roughness and waviness profile along with their calculated surface parameters and uncertainties.