Histogram Matching
- Author: O.Conrad (c) 2019
- Menu: Grid | Calculus | Transformations
Description
This tool alters the values of a grid so that its value distribution (its histogram), matches that of a reference grid. The first method simply uses arithmetic mean and standard deviation for adjustment, which usually is sufficient for normal distributed values. The second method performs a more precise adjustment based on the grids' histograms.
Parameters
Name | Type | Identifier | Description | Constraints | |
---|---|---|---|---|---|
Input | Grid | grid, input | GRID | - | - |
Reference Grid | grid, input | REFERENCE | - | - | |
Output | Adjusted Grid | grid, output, optional | MATCHED | - | - |
Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
Grid system | grid system | REFERENCE_GRIDSYSTEM | - | - | |
Method | choice | METHOD | - | Available Choices: [0] standard deviation [1] histogram Default: 1 | |
Histogramm Classes | integer number | NCLASSES | Number of histogram classes for internal use. | Minimum: 100 Default: 10 | |
Maximum Sample Size | integer number | MAXSAMPLES | If set to zero all data will be used to build the histograms. | Minimum: 0 Default: 1000000 |
Command Line
Usage: saga_cmd grid_calculus 21 [-GRID] [-MATCHED ] [-REFERENCE ] [-METHOD ] [-NCLASSES ] [-MAXSAMPLES ] -GRID: Grid grid, input -MATCHED: Adjusted Grid grid, output, optional -REFERENCE: Reference Grid grid, input -METHOD: Method choice Available Choices: [0] standard deviation [1] histogram Default: 1 -NCLASSES: Histogramm Classes integer number Minimum: 100 Default: 10 -MAXSAMPLES: Maximum Sample Size integer number Minimum: 0 Default: 1000000