CompressionCode
Namespace: Datalogics::PDFL
Description
Compression values for generating graphics files from PDF pages. A compression value must be provided for JPG or GIF images.
Values
- Default = 0
Use the default for the output image type.
- NONE = 1
Use no image compression. Valid for BMP, PNG and TIFF outputs only.
- FLATE = 2
Deflate algorithm (PNG only). An open source standard widely used for creating zip files and with PDF.
- LZW = 3
Lempel-Ziv-Welch, valid for TIFF output. Valid for GIF and TIFF. A lossless algorithm, resulting files are larger but retain original quality.
- G3 = 4
CCITT Group3 compression. Valid for TIFF, requires colorModel gray. A lossless algorithm for black and white images that efficiently compresses whitespace.
- G4 = 5
CCITT Group4 compression. Valid for TIFF, requires colorModel gray. A lossless algorithm for black and white images based on G3.
- DCT = 6
Discrete Cosine Transform. Lossy algorithm, valid for JPEG. Best when used with continuous tone (such as photographs).