Package com.pdftools.pdf2image

Enum DitheringMode

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<DitheringMode>
    public enum DitheringMode
extends java.lang.Enum<DitheringMode>

    The dithering algorithm for converting to bitonal images

    Dithering is the process of converting continuous-tone (grayscale or color) content to black-and-white (bitonal) representation. Different algorithms offer trade-offs between visual quality and compression efficiency.

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      ATKINSON
      Atkinson dithering
      FLOYD_STEINBERG
      Floyd-Steinberg dithering
      HALFTONE
      Halftone dithering
      NONE
      No dithering

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static DitheringMode valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static DitheringMode[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.

      • Methods inherited from class java.lang.Enum

        compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • Enum Constant Detail

      • NONE

        public static final DitheringMode NONE

        No dithering

        Simple thresholding without dithering. Best for clean line art and text-only documents.

      • HALFTONE

        public static final DitheringMode HALFTONE

        Halftone dithering

        Ordered halftone dithering using a periodic pattern. Provides a good balance between visual quality and compression.

      • FLOYD_STEINBERG

        public static final DitheringMode FLOYD_STEINBERG

        Floyd-Steinberg dithering

        Error diffusion dithering that distributes quantization errors to neighboring pixels. Produces high-quality results, especially for photographic content.

      • ATKINSON

        public static final DitheringMode ATKINSON

        Atkinson dithering

        A variant of error diffusion dithering that produces results with good compression characteristics.

    • Method Detail

      • values

        public static DitheringMode[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (DitheringMode c : DitheringMode.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static DitheringMode valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null