The ChangeReference tool is a combination of the MoveReference and ScaleReference tools, easing the task of setting up a reference system, especially prior to image resampling.

Setup

Coordinate system

• Reference - Input reference system selection

New coordinate system - defines the transformation from the old to the new reference system

• Translation X and Y - x and y translation - defines the origin in the new reference system (see note below)
• Rotation - Rotation in degrees
• Scale - common scale factor for both axes
• Use rotation/scale center - if unchecked, the new reference system is rotated/scaled around the new (translated) origin. If checked, a specified point is used instead:
  • Image center - center of the current image
  • Center X, Y - specified in incoming coordinates

Note: for most applications, you will be using either the translation or the rotation/scale center. While a combination is certainly possible, the result may be hard to understand. The recommended use is:

• If Translation X,Y is nonzero, make sure Use rotation/scale center is unchecked. Intended use: any static reference system movement/rotation/scale
• If Use rotation/scale center is checked, set Translation X,Y to zero. Intended use: image scale/rotation prior to resampling

The ROI can be managed by the buttons

• Paste - paste the ROI from the image to the scorpion clipboard
• Copy - copy the ROI to the image from the scorpion clipboard

Point & Click Clipboard Support

This is defined by a line or a point. The first point defines the origin / center. The second point defines the angle.

One point will change the origin.

Note: Copy is used to transfer polygon to the image for editing and modification. The edited polygon is pasted back to the tool using Paste. More on Point and Click Operations

Visualisation

Results  

(None)