PdfImageCompressionOptions Enumeration

Pdf image compression options

Full Name: aspose.imaging.imageoptions.PdfImageCompressionOptions

Members

Member name	Description
AUTO	Automatically selects the most appropriate compression for each image.
CCITT3	/CCITTFaxDecode/DecodeParms/K 0/Columns 173 Does not support transparency.
CCITT4	/CCITTFaxDecode/DecodeParms/K -1/Columns 173 Does not support transparency.
FLATE	Flate compression.
JPEG	Jpeg compression. Does not support transparency.
LZW_BASELINE_PREDICTOR	Predictor selection is restricted to PNG Paeth predictor to speed-up the process. In practice performs surprisingly good. Better than PdfImageCompressionOptions.LZW_OPTIMIZED_PREDICTOR.
LZW_OPTIMIZED_PREDICTOR	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 PdfImageCompressionOptions.LZW_BASELINE_PREDICTOR kicks ass leaving optimized predictor behing by 25-40% compression rate gains.
NONE	Saves raw image bytes resulting in bigger pdf file sizes.
RLE	Run Length compression.