Gaussian Brightness Correction
The goal of Gaussian Brightness Correction is to balance the brightness of the image's dark and light regions.
The Sphere Radius controls the size of the region, in which the correction is applied. The Gaussian Brightness Correction works for all types of brightness variations when the grain diameters are small in relation to the Sphere Radius :
There are two Correction Methods available: Multiplicative and Additive. Which method should be used depends on the processing applied by the image acquisition device. Scanned image data typically indicates whether the device uses linear or logarithmic processing. If the processing is linear, use the Multiplicative correction method. If the processing is logarithmic, use the Additive correction method.
Click Apply to use the Gaussian Brightness Correction based on the the given settings.
The example below shows how a brightness gradient in a granular structure was corrected by applying the Gaussian Brightness Correction. The structure's average grain diameter is 15 µm, and its voxel length is 1 µm. Therefore, using a Sphere Radius of 45 works well for correcting the brightness gradient.
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Know how! You can Save your current settings for this tool as Start-Up Settings . The next time you process an image, these settings will be automatically loaded and filled into the parameter fields. You can also load the Built-In Default Settings available in GeoDict. If you change any settings and want to revert to your saved start-up settings, click the corresponding button to Load the Start-Up Settings . |
