Contour Lines

 

In this mode, you can visualize and save the contours of the Tag regions of the dataset volume. These contours can be either closed contour lines or just the points on these lines.

 

The line segments are ordered so that the Tag pixels of that segment are always on the right-hand side of the segment.

 

In the Line mode, if a Tag region is too thin, and the contour degenerates to a line (2 line segments share the same points), the degenerated segment will be eliminated. Thus, some points may appear in the Point mode but not in the Line mode. (See example below)

 

 

From the Graphic Interface

 

 

 

TAG List

Select which Tag is going to be used to create the 3D surfaces. The yellow indicator on the Tag’s button is lit if the Tag is selected.

 

Sub-sampling

The number of points on the contours  is controlled by the sub-sampling, but the polygons’ contours will use ALL the voxels.

 

Contour Points

Only the points on the contours of the objects will be displayed and saved.

 

Contour Lines

The contours of the Tag regions will be displayed and saved as closed lines.

 

Create Geometry

A geometrical object will be created from the contours (either points or lines). These objects can be visualized in the other sliceOmatic modes, or saved to a geometry file (See the File Menu section of The Main Menu and the Shading section of The 3D Tools).

 

 

From the Display Area

 

There is no Display Area interaction specific to this mode.

 

 

From the Keyboard

 

There is no keyboard interface specific to this mode.

 

 

From the Command Line

 

System Variables defined in this module:

 

 

$CONTOUR_MODDE

(U8)

Contour mode. 0=points, 1=lines.

 

 

$CONTOUR_SUBSAMPLING

(A,U16)

Array of 3 sub-sampling values (x,y and z).  Sub-sampling values goes from 0 (no sub-sampling) to 10 (1 pixel every 10).

 

 

Text commands recognized in this module:

 

Contour: Mode (line|point)

Assign a value to the $CONTOUR_MODE variable. 0 = point mode, 1 = line mode.

 

Contour: Sampling (x|y|z) value

Assign values to the x,y and z components of the $CONTOUR_SUBSAMPLING array.

 

Contour: Compute [line|point]

Compute the contour curve.  If the "line" or "point" parameter is present, it define the type of values.  Otherwise, the $CONTOUR_MODE variable is used.