Current Help System: PC-DMIS Laser (View Core Help)

#### Density Type: Intelligent Density Management

This is available only for the Perceptron Contour V5 sensor.

Intelligent Density Management with Filter Type 'None'

Intelligent Density Management (IDM) is only available for Perceptron V5 laser probes. Scanning at high speeds is only accomplished by means of IDM. Features scanned using IDM can also be used for auto feature extraction since edge points are found with IDM.

Filter Type and Density Type can be used together. For example, you might want a “Long Line” filter with IDM density. However, in the case where you only want to apply the IDM density, the Filter Type should be set to "None".

The two IDM settings work together to determine which points should be reduced (removed) based on the position of the neighboring points. When data points are considered to be on the same plane, only a few point are needed. Points are retained if they are outside the Flatness Tol or the Max Span distance has been reached.

For Example: In the image below, you can see how there are fewer points retained along the straight lines while and many more points are retained along the curved lines.

IDM uses the following settings:

Flatness Tol (A): Provides the number of microns in which the neighboring point is not considering to reside in the same plane. Points that deviate from this range will be included in the subset of points. This value should be between 1-60.

Max Span (B): Provides the maximum distance (in microns) that included points can be from each other. Once the Max Span has been reached for points that are within the Flatness Tol a new point will be included in the subset of points. This value should be between 150-2500.

IDM Sample - Flatness Tol (A) and Max Span (B)

Example IDM Settings

Flatness Tol. | Max Span | Result
15 | 1000 | Provides data at nominal 1mm point-spacing. This allows you to achieve significant data reduction without sacrificing surface details. This might be considered the "optimal data compression" since it provides a good balance of CPU load, memory usage, and graphic card load.
150 | 2500 | This would be considered the maximum data-reducing IDM setting. This setting places a heavy load on the CPU, but memory usage and graphics card load is reduced.
1 | 60 | Emulates V4 probe performance with a V5 probe. This setting is easy on the CPU, but does require more memory and puts more load on the graphics card.
1 | 120 | This is the same as having IDM turned off.