Introducing Polyworks PIFEdit:
PIFEdit is a data viewing and editing software available in the PolyWorks suite. It is used to clean scan data of unwanted data/points before importing the data into IMAlign.
* Note: You have to have a full license of Polyworks (w/dongle) to be able to edit and save data out of PIFEdit (otherwise it functions only as a viewer.
Upon opening the PIF file in PIF Edit, view the scan using the appropriate mouse buttons:
Left Button: Rotates the scan
Middle Button: Translates the scan
Right Button: Zooms in and out on the scan
Get accustomed to the use and “feel” of these buttons because they are used in all of the PolyWorks modules.
View the data from every angel to identify which data you want to keep and which data can be removed.
In the image above, a group of ROTC soldiers were included in the scan. Since the focus of the scan is the building, the scan data of the soldiers, the trees, and the ground in front of the building will all be removed.
Notice how the trees and the soldiers (objects in the forefront) cause shadows or holes in the scan data of the structure (object in the rear). This can be remedied by simply acquiring another scan of the same area from another location if access and time permit another scan.
SELECT UNWANTED DATA
To remove the unwanted scan data, press the space bar. This activates the Selection dialog box.
Hold down the Shift and Ctrl keys and use the middle mouse button to make your selection.
Shift: Enables Volumetric Selection – otherwise it is in Surface Selection mode which is only useful with polygon meshes
Ctrl: Enables Polygonal Selection – otherwise in Freeform Selection mode
CONFIRM SELECTION & DELETE DATA
Because you have to perform a volumetric selection in PIFEdit (aka it selects everything in the selection window), it is always good to double check the integrity of your selection before you delete any data.
Once you have done so you can go ahead and delete the unwanted data points from the scan. Repeat this operation as many times as needed.
When finished, go to File – Save As – save as name_cln.pf.
Note: Our naming convention is to tack a ‘cln’ onto the scan name or to put the cleaned data into a ‘clean’ subfolder. As a rule of thumb – never overwrite the original data.
For further processing in the Polyworks Suite, continue on to Importing Data into IMAlign.
You are reading the series: ILRIS-3D Parser and Polyworks v.11 - Suggested workflow for Basic Processing of Optech ILRIS-3D Data
- Optech ILRIS-3D Parser: Pre-Processing Scan Data
- Polyworks PIFEdit: Cleaning Point Cloud Data
- Importing Optech Data into IMAlign – Polyworks V11
- Registering (aligning) Scans in Polyworks V11 IMAlign