This tool performs a Gaussian stretch on a raster image. The observed histogram of the input image is fitted to a Gaussian histogram, i.e. normal distribution. A histogram matching technique is used to map the values from the input image onto the output Gaussian distribution. The user must input the number of tones (`num_tones`) used.

This tool is related to the more general histogram_matching tool, which can be used to fit any frequency distribution to an input image, and other contrast enhancement tools such as histogram_equalization, min_max_contrast_stretch, percentage_contrast_stretch, sigmoidal_contrast_stretch, and standard_deviation_contrast_stretch.

## See Also

piecewise_contrast_stretch, histogram_equalization, min_max_contrast_stretch, percentage_contrast_stretch, sigmoidal_contrast_stretch, standard_deviation_contrast_stretch, histogram_matching

## Function Signature

`def gaussian_contrast_stretch(self, raster: Raster, num_tones: int = 256) -> Raster: ...`

## Project Links

WbW Homepage User Manual Support WbW