Proposals:Refactoring Index Point Coordinate System

Overview

The conversion between physical points and indices is not consistent in all places in the toolkit.

The following cases must be considered

• Interpolators
• Registration
• Transforms
• DICOM
• Conversion between ITK and VTK
• Backwards compatibility
• Template programming for more efficient conversions

Review of Current Status

Image Class

The image class considers that the location of a pixel is at the physical coordinates of the center of the pixel.

NOTE: The original file for this diagram can be found in
InsightDocuments/SoftwareGuide/Art/ImageOriginAndSpacing.fig
http://www.itk.org/cgi-bin/viewcvs.cgi/SoftwareGuide/Art/ImageOriginAndSpacing.fig?root=InsightDocuments&view=log

PNG Diagram

SVG Diagram

Interpolators

Interpolators are used in the Registration Framework and in the Resampling filters.