Enum PdfImageCompressionOptions
Namespace: Aspose.Imaging.ImageOptions
Assembly: Aspose.Imaging.dll (25.2.0)
Pdf image compression options
public enum PdfImageCompressionOptionsFields
Auto = 0
Automatically selects the most appropriate compression for each image.
Ccitt3 = 7
/CCITTFaxDecode/DecodeParms/K 0/Columns 173 Does not support transparency.
Ccitt4 = 8
/CCITTFaxDecode/DecodeParms/K -1/Columns 173 Does not support transparency.
Flate = 3
Flate compression.
Jpeg = 6
Jpeg compression. Does not support transparency.
LzwBaselinePredictor = 4
Predictor selection is restricted to PNG Paeth predictor to speed-up the process. In practice performs surprisingly good. Better than Aspose.Imaging.ImageOptions.PdfImageCompressionOptions.LzwOptimizedPredictor.
LzwOptimizedPredictor = 5
Predictor selection is more complicated and should result in smaller image sizes but taking more time. RFC 2083 says it is the best way to go. But on the test data baseline predictor Aspose.Imaging.ImageOptions.PdfImageCompressionOptions.LzwBaselinePredictor kicks ass leaving optimized predictor behing by 25-40% compression rate gains.
None = 1
Saves raw image bytes resulting in bigger pdf file sizes.
Rle = 2
Run Length compression.