ContrastEnhancement|out
This application is the implementation of the histogram equalization algorithm. It can be used to enhance contrast in an image or to reduce the dynamic of the image without losing too much contrast. It offers several options as a nodata value, a contrast limitation factor, a local version of the algorithm and also a mode to equalize the luminance of the image.
Image Filtering
QgsProcessingParameterRasterLayer|in|Input Image|None|False
QgsProcessingParameterRasterDestination|out|Output Image|None|False
QgsProcessingParameterNumber|bins|Number of bins|QgsProcessingParameterNumber.Integer|256|True
QgsProcessingParameterNumber|hfact|Contrast Limitation|QgsProcessingParameterNumber.Double|0|True
QgsProcessingParameterNumber|nodata|Nodata Value|QgsProcessingParameterNumber.Double|0|True
OTBParameterChoice|spatial|Spatial parameters for the histogram computation|local;global|0|True
QgsProcessingParameterNumber|spatial.local.h|Thumbnail height|QgsProcessingParameterNumber.Integer|256|True
QgsProcessingParameterNumber|spatial.local.w|Thumbnail width|QgsProcessingParameterNumber.Integer|256|True
OTBParameterChoice|minmax|Minimum and maximum settings|auto;manual|0|True
QgsProcessingParameterBoolean|minmax.auto.global|Global|false|True
QgsProcessingParameterNumber|minmax.manual.min|Minimum value|QgsProcessingParameterNumber.Double|0|True
QgsProcessingParameterNumber|minmax.manual.max|Maximum value|QgsProcessingParameterNumber.Double|0|True
OTBParameterChoice|mode|What to equalized|each;lum|0|True
QgsProcessingParameterNumber|mode.lum.red.ch|Red channel|QgsProcessingParameterNumber.Integer|0|True
QgsProcessingParameterNumber|mode.lum.red.coef|Value for luminance computation for the red channel|QgsProcessingParameterNumber.Double|0.21|True
QgsProcessingParameterNumber|mode.lum.green.ch|Green channel|QgsProcessingParameterNumber.Integer|1|True
QgsProcessingParameterNumber|mode.lum.green.coef|Value for luminance computation of the green channel|QgsProcessingParameterNumber.Double|0.71|True
QgsProcessingParameterNumber|mode.lum.blue.ch|Blue channel|QgsProcessingParameterNumber.Integer|2|True
QgsProcessingParameterNumber|mode.lum.blue.coef|Value for luminance computation of the blue channel|QgsProcessingParameterNumber.Double|0.08|True
*QgsProcessingParameterEnum|outputpixeltype|Output pixel type|uint8;int;float;double|False|2|True