PaletteMiningMethod enumeration

The image palette mining method

public enum PaletteMiningMethod


UseCurrentPalette0Use exisiting palette of the image
ColorClustering1The color clustering method
Histogram2The histogram method


The following example shows how to compress a PNG image, using indexed color with best fit palette


// Loads png image        
    string  sourceFilePath="OriginalRings.png";
    string  outputFilePath="OriginalRingsOutput.png";
    using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(sourceFilePath))
    image.Save(outputFilePath, new Aspose.Imaging.ImageOptions.PngOptions()
         Progressive = true,
             // Use indexed color type
         ColorType = Aspose.Imaging.FileFormats.Png.PngColorType.IndexedColor,
             // Use maximal compression
         CompressionLevel = 9,
      // Get the closest 8-bit color palette which covers as many pixels as possible, so that a palettized image
         // is almost visually indistinguishable from a non-palletized one.
         Palette = Aspose.Imaging.ColorPaletteHelper.GetCloseImagePalette((Aspose.Imaging.RasterImage)image, 256, Aspose.Imaging.PaletteMiningMethod.Histogram)
    // The output file size should be significantly reduced

See Also