Input Point Processing

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Input Point Processing

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Navigation:  Widget Designer > Devices > AirScan >

Input Point Processing

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This chapter explains the Input Point Processing settings in the AirScan Tool in Widget Designer. For more information please see the introductory chapter.



Use the zoom factor to zoom in / out the AirScan field, the preview window in Widget Designer.
Max zoom: 1 (horizontal axis ranges from left= -110mm to right= +100mm and vertical from top=0 to bottom= -185mm
When zooming further out, the 0,0 origin point, which is the intersection of the horizontal and vertical axis, will always be located in the middle of the top border.


This value is important as the IR readout of the AirScan can have noticeable noise that is filtered out with this prediction based damping.

The damping factor is set by default to 0.10. You can change this setting from 0.1 = maximum damping up to 1 = no damping.


The Dynamic Motion Damping improves the stability of the touch point in motion and stabilizes the points when they are not moving. It is set by default to 0.2. Its value ranges from 0 (max. smoothness) to 1 (no motion filtering).

Please note, that there is also the option to predict the motion under "Point Tracking">"Motion Prediction".


Enter here the resolution of your Widget Designer GUI (width and height). The Active Region will later map to this resolution.

Location x and y, Orientation:

Enter the location (in mm) of the AirScan hardware and orientation in degree. The location is of special interest when working with multiple AirScans.

Active Region:

The coordinates x and y define the position of the Active Region in relation to the AirScan's position in mm. Please enter the size of the region for w (width) and h (height) in mm. Alternatively you can use the "Draw Region (of Interest)" button or Calibration.
This region is now mapped to the Resolution you entered above. So first, the AirScan device reports a total distance in mm for an active point that entered the AirScan scan field. Now it is checked whether it is inside the Active Region. And only if that is the case, it is translated to a pixel value according to the given "Width" and "Height" of the Active Region and the "Resolution".

Safe Region:

The Safe Region makes the detection of points on the border of the Active Region more robust.
Enter values in mm for the width and height. Ideally the Safe Region is a bit bigger than the Active Region, e.g. by 10%.

Draw Region:

Click this button and drag a rectangle in the AirScan preview field starting with the upper left corner (when looking at this window!) and ending with the bottom right corner. The drawn rectangle overwrites the values for the Active Region including Save Region, explained above.

Draw Region of Interest:

Click this button to create a region of interest if that is not a rectangle but a shape with x corners. A regular Active Region has to be set up beforehand, the Region of Interest needs to lie within it to generate active points. The X and Y position data of points in the Region of Interest is also calculated referring to the space defined by the Active Region. Use this feature e.g to exclude elevated structures or noisy areas on your touch surface.

To do so, first click the button, then once into the window which creates (an invisible) corner for your shape. When you now move the mouse and click a second time, a line is created and a second corner is defined. Each click will now create a line that started at the previous click location and ends at the current one. To "close" the shape, i.e. connect the last click connection to the very first one, simply click the button again. A third button click will let you draw a new region.

Inv X / Inv Y / Swap:

This inverts the horizontal (X) or vertical (Y) min/max v        alues or swaps X with Y. Use these options if the AirScan is not located above the active field.
If the AirScan position is e.g. below the active field, check "Inv Y" to receive correct Y Position data.

The next chapter explains the settings for Calibration, which allows an intuitive calibration of the Active Region.