Class ContrastMethod

Object
CodeList<ContrastMethod>
ContrastMethod
All Implemented Interfaces:
Serializable, Comparable<ContrastMethod>

public final class ContrastMethod extends CodeList<ContrastMethod>
The ContrastEnhancement element defines contrast enhancement for a channel of a false-color image or for a color image.

In the case of a color image, the relative grayscale brightness of a pixel color is used. “Normalize” means to stretch the contrast so that the dimmest color is stretched to black and the brightest color is stretched to white, with all colors in between stretched out linearly. “Histogram” means to stretch the contrast based on a histogram of how many colors are at each brightness level on input, with the goal of producing equal number of pixels in the image at each brightness level on output. This has the effect of revealing many subtle ground features.

Since:
GeoAPI 2.2
Author:
Open Geospatial Consortium, Johann Sorel (Geomatys)
See Also:
  • Field Details

    • NORMALIZE

      public static final ContrastMethod NORMALIZE
      Normalize enchancement. “Normalize” means to stretch the contrast so that the dimmest color is stretched to black and the brightest color is stretched to white, with all colors in between stretched out linearly.
    • HISTOGRAM

      public static final ContrastMethod HISTOGRAM
      Histogram enchancement. “Histogram” means to stretch the contrast based on a histogram of how many colors are at each brightness level on input, with the goal of producing equal number of pixels in the image at each brightness level on output.
    • LOGARITHMIC

      public static final ContrastMethod LOGARITHMIC
    • EXPONENTIAL

      public static final ContrastMethod EXPONENTIAL
    • NONE

      public static final ContrastMethod NONE
      No enchancement. this is the default value.
  • Method Details

    • values

      public static ContrastMethod[] values()
      Returns the list of ContrastTypes.
      Returns:
      The list of codes declared in the current JVM.
    • family

      public ContrastMethod[] family()
      Returns the list of enumerations of the same kind than this enum.
      Specified by:
      family in class CodeList<ContrastMethod>
      Returns:
      The codes of the same kind than this code.
    • valueOf

      public static ContrastMethod valueOf(String code)
      Returns the contrast type that matches the given string, or returns a new one if none match it.
      Parameters:
      code - The name of the code to fetch or to create.
      Returns:
      A code matching the given name.