2014.12.22 23:02 "Re: [Tiff] PNG in TIFF ?", by Ulf Zibis

Hi all,

Am 21.12.2014 um 21:20 schrieb Toby Thain:

On 21/12/14 3:12 PM, Ulf Zibis wrote:

is it possible, to have PNG-compressed images in multi-page TIFF file?

Closest in standard TIFF would be LZW, but G4 is smaller for bitonal images.

You could define a custom compression type, but nobody else would be able to read the file.

It's interesting that you mention bitonal images. In my use case I had 4 PNG images from a black&white scan of some document with following sizes:

185 kB
56 kB
74 kB
154 kB

I gained following file sizes with different compression methods composing the 4 images into a multi-page TIFF, but never reached the sum off those 4 PNG files which is only 469 kB:

Fax G4: 899 kB
Packbits: 683 kB
LZW: 643 kB
ZIP: 510 kB

Much thanks to all the comments from everybody,

Ulf