When a measuring tool is enabled and the reports preview window is set to Profile, a pixel density profile across the 16-bit monochrome dataset is generated. Each measurement tool creates a different profile:

• Diametric: A pair of radial profiles, each beginning at the origin and ending at the two yellow markers on the tool.
• Radial: A radial profile, beginning at the origin and ending at the yellow marker on the tool.
• Rectangular: A pair of profiles, oriented either vertically or horizontally, each beginning midway between the indicated ends of the rectangle on the profile line. The lines to be profiled are indicated by the selected profile colors. If perpendicular averaging is enabled, the pixels along the line perpendicular to the primary orientation are averaged. The primary orientation is automatically set to the longest dimension of the rectangle whenever the tool size is changed. You can override this in the Tool options... dialog.
• Polygon: This tool does not support profiling.
• Axes: A separate profile for each half axis, starting at the origin, for the distance indicated by the yellow marker on the tool.

Profiles are sampled at a user definable frequency using bilinear interpolation of the 16-bit data. The default sampling rate is 20 samples per cm (ie a sample is taken every 0.05 cm). Mean and standard deviation of the pixel densities along the path are optionally calculated and displayed. The measuring tool can be nudged using the arrow keys and a profile can be copied to the clipboard for export to a spreadsheet (see tips & tricks).

This is an example of a profile using the diametric tool.

This is an example of a profile using the radial tool.

This is an example of a profile using the axes tool.

This is an example of a profile using the axes tool with only one of the half-axes enabled.

This is an example of a profile using a rectangular tool, oriented horizontally with perpendicular averaging enabled.

This is an example of a profile using a rectangular tool, oriented horizontally with perpendicular averaging disabled.

This is an example of a profile using a rectangular tool, oriented vertically with perpendicular averaging enabled.