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ENVI

Saturation Stretch

Saturation Stretch

Use Saturation Stretch to enhance the color of a 3-band input image by producing output bands that have more saturated colors. The input data are transformed from red, green, and blue (RGB) space to hue, saturation, and value (HSV) space. A gaussian stretch is performed on the saturation band so the data fills the entire saturation range. The HSV data are then automatically transformed back to RGB space.

Saturation stretching requires 3 bands for input. These bands should be stretched byte data or selected from an open color display.

  1. From the Toolbox, select Transform > Saturation Stretch. The Saturation Stretch Input dialog appears.
  1. Select one band each for the R, G, and B fields, then click OK. The Saturation Stretch Parameters dialog appears.
  2. To spatially subset your data, click Spatial Subset.
  3. Output the result to File or Memory.
  4. Click OK.



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