FILTER name |
Parameters |
Description |
---|---|---|
ASCIIHexDecode |
no |
Decodes data encoded in an ASCII hexadecimal representation, reproducing the original binary data. |
ASCII85Decode |
no |
Decodes data encoded in an ASCII base-85 representation, reproducing the original binary data. |
LZWDecode |
yes |
Decompresses data encoded using the LZW (Lempel-Ziv-Welch) adaptive compression method, reproducing the original text or binary data. |
FlateDecode |
yes |
(PDF 1.2) Decompresses data encoded using the zlib/deflate compression method, reproducing the original text or binary data. |
RunLengthDecode |
no |
Decompresses data encoded using a byte-oriented run-length encoding algorithm, reproducing the original text or binary data (typically monochrome image data, or any data that contains frequent long runs of a single byte value). |
CCITTFaxDecode |
yes |
Decompresses data encoded using the CCITT facsimile standard, reproducing the original data (typically monochrome image data at 1 bit per pixel). |
JBIG2Decode |
yes |
(PDF 1.4) Decompresses data encoded using the JBIG2 standard, reproducing the original monochrome (1 bit per pixel) image data (or an approximation of that data). |
DCTDecode |
yes |
Decompresses data encoded using a DCT (discrete cosine transform) technique based on the JPEG standard, reproducing image sample data that approximates the original data. |
JPXDecode |
no |
(PDF 1.5) Decompresses data encoded using the wavelet-based JPEG2000 standard, reproducing the original image data. |
Crypt |
yes |
(PDF 1.5) Decrypts data encrypted by a security handler, reproducing the data as it was before encryption. |