The Color separation operation allows you to extract different 'bands' for instance from a scanned or digital color photo as if using color filters when taking the picture. After color extraction, you can perform the normal Image Processing operations like Filtering, Classification, etc. on these bands.
Maps that have a Picture domain or the (24 bit) Color domain store for each pixel three values: Red, Green and Blue. The Color separation operation allows you to retrieve for each pixel either the Red, Green or Blue value and store these in a separate map. You can also retrieve Yellow, Magenta, Cyan, combined Gray values, or Hue, Saturation or Intensity values for each pixel.
Dialog box options:
Input raster map: |
Select an input raster map. Open the list box and select the desired input map, or drag a raster map directly from the Catalog into this box. Only input maps with a picture domain or the color domain are allowed. |
Color: |
Select the color you want to retrieve: Red, Green, Blue, Yellow, Magenta, Cyan, Hue, Saturation, Intensity or Gray. |
Output raster map: |
Type a name for the output raster map that will contain the values of one color of the input map. |
Description: |
Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description. |
When you click the Show button, the dependent output map will be defined, calculated and shown. When you click the Define button, the dependent output map will only be defined; if necessary the map will be calculated later, for instance when the map is opened to be displayed.
See also: