Volume Rendering

Volume Rendering


Overview
Displays volume-rendering done based on the ray-tracing algorithm. Displays a composite image generated after taking into account transparency at all sampling points on a ray.

Note: Volume rendering cannot be done in the Open GL mode. The data has to be 3D byte or short uniform structured cell data in order that volume rendering can be used.


Parameters

Visible
Turns on and off the volume rendering display.

Reset
Resets all parameters to their original values.

Save MVG
Saves visualization results in an MVG file.

Help
Displays help.

downsize_level
Adjusts data precision based on sampling. The data has the precision of the original data when this value is 1 and precision decreases as the value increases.

Select data
Selects the data for which volume rendering is required.

border value
The range of data values between minimum to maximum are divided into two and transparency is defined within each part. This boundary value defines the value that creates the two portions.

less_than_border
Defines the transparency for the portion less than the boundary value.

alpha_of_0_value - Defines transparency for data value 0. Transparency is specified as a value in the range 0~1. Transparency increases as the value tends to 0.

alpha_of_X_value - Defines transparency for data value X. Transparency is specified as a value in the range 0~1. Transparency increases as the value tends to 0. X denotes the boundary value.

greater_than_border
Defines the transparency for the portion greater than the boundary value.
alpha_of_X_value - Defines transparency for data value X. Transparency is specified as a value in the range 0~1. Transparency increases as the value tends to 0. X denotes the boundary value.

alpha_of_255_value - Defines transparency for data value 255. Transparency is specified as a value in the range 0~1. Transparency increases as the value tends to 0.

smooth
A high-quality image with greater precision is obtained

alpha_linear
Linearly interpolates transparency values defined for values less then (greater than) the boundary value. When this is turned off, no interpolation takes place and sharper images are obtained.

Colormap Editor
Displays a panel to adjust the colormap.

Color Legend
Displays the color legend.



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