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This page summarizes the Crop tool.


Motivation

Often a part of a scene is more suitable for modelling work than the complete recorded scene.
Hyperspectral data cubes typically need a lot of memory and a lot of data processing effort.
Furthermore, modelling methods can often generate better results when focusing on the "important" part of spectra.

Function

The Crop Tool allows to crop hyperspectral data cubes along

  • the spatial domain
  • the spectral domain
  • the sample domain (the time domain in case of line-scan)

The result of the crop process is a new cube made available in the project browser.

About the Crop Tool

The tool is accessible from the ribbon in several perspectives of the Perception Studio program.
Below the Crop Tool of a hyperspectral data cube of various plastic plates is shown.

On the left side of the tool the Preview feature image gives access to the spectral information of the various plastic plates.
The image on the right visualizes the spectral information at the time position selected by the time point locator (the red line) in the left view. The green outer rectangles in the views facilitate the crop process to a 3D region of interest.
On the bottom of the views the coordinates of the selected region is shown. Compose a region by editing these controls.

Crop the Pixel Domain

In the left image drag the sides of the green rectangle to set the region of interest in the pixel domain.
Alternatively, use the controls Sample Axis and Spatial Axis to set a desired region of interest manually.

Crop the Sensor Domain (pushbroom)

In the right image drag the sides of the green rectangle to set the region of interest in the sensor domain.
Changes to the width cause a spectral crop, while changes to the height crop the spatial domain (number of pixels on the inspection line).
Alternatively, use the controls Spectral Axis and Spatial Axis to set a desired region of interest manually.

Cancel

Click on cancel to abort without cropping the data.

Crop

Click on the Crop button in the bottom right to confirm your current settings.

Workflow

  • Select a cube of interest in the current perspective (like Explore or Model).
  • Click on Crop icon in the ribbon of the perspectives.
  • The Crop Tool gets opened.
  • Set the desired region of interest.
  • Click Crop button to perform the crop process.
  • In the project browser select the new (cropped) data cube.

Hints

 


© 2019 by Perception Park GmbH
The content of this page and any attached files are confidential and intended solely for the addressee(s). Any publication, transmission or other use of the information by a person or entity other than the intended addressee is prohibited. If you receive this in error please contact Perception Park and delete copied material. Perception Park GmbH, Wartingergasse 42, A-8010 Graz; Austria; FN 400381x

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