TIFF Save Options

 

These options determine how PMView saves TIFF files.

 

Compression - Bilevel Images This lets you choose compression method for Bilevel (Black/White) images.

None No compression is used

Packbits Use Apple Macintosh PackBits compression scheme

LZW Use LZW adaptive compression scheme

Deflate (ZIP) Use the Deflate compression scheme (ZIP-in-TIFF)

JPEG Use JPEG compression (JPEG-in-TIFF). Note: The quality and other settings set in the JPEG options dialog will be used.

CCITT RLE Use Modified Huffman encoding scheme (CCITT Group 3 1D)

CCITT FAX3 Use CCITT Group 3 facsimile encoding scheme

CCITT FAX4 Use CCITT Group 4 facsimile encoding scheme

 

Compression - Color Images This lets you choose compression method for Color images.

None No compression is used

Packbits Use Apple Macintosh PackBits compression scheme

LZW Use LZW adaptive compression scheme

Deflate (ZIP) Use the Deflate compression scheme (ZIP-in-TIFF)

JPEG Use JPEG compression (JPEG-in-TIFF). Note: The quality and other settings set in the JPEG options dialog will be used.

 

Photometric This setting applies only to Bilevel and Grayscale images. You may want to alter this setting if the target application displays your image as a negative.

White is Zero 0 is imaged as white. 2&caret.BitsPerSample-1 is imaged as black.

Black is Zero 0 is imaged as black. 2&caret.BitsPerSample-1 is imaged as white.

 

LZW Differencing Predictor. This setting applies only if LZW compression is used. Applying a predictor may greatly improve compression ratios for some images.

 

Strip Size In order to optimize compression for non-bilevel images, select 32kB for Strip Size and use horizontal differencing. For compatibility with other applications, select 8kB for Strip Size and don't use differencing. Some applications, most notably applications that read TIFF CCITT FAX files, cannot cope with files that have more than one strip. For this purpose we provide the Single strip option. Note that the TIFF 6.0 specification discourages the use of strips larger than 64kB so we recommend that the single strip setting only should be used when required by the target application.

 

Byte Ordering This setting determines the byte ordering used when saving TIFF files. If Intel is selected, Intel byte ordering will be used, i.e. the least significant byte is stored first. Intel byte ordering is used for instance on the IBM PC. If Motorola is selected, Motorola byte ordering will be used, i.e. the most significant byte is stored first. Motorola byte ordering is used on the Apple Macintosh and most UNIX systems. Select the byte ordering used by the target system.

 

Note: For more information on these options, please refer to the TIFF 6.0 specification available from Adobe Corporation. As of this writing, it can be downloaded at ftp://ftp.adobe.com/pub/adobe/devrelations/devtechnotes/pdffiles/tiff6.pdf

 

Related information:

The Tagged Interchange File Format