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2014.12.21 20:20 "Re: [Tiff] PNG in TIFF ?", by Toby Thain
- 2014.12.21 20:49 "Re: [Tiff] PNG in TIFF ?", by Joris Van Damme
- 2014.12.22 23:02 "Re: [Tiff] PNG in TIFF ?", by Ulf Zibis
- 2014.12.27 22:24 "Re: [Tiff] PNG in TIFF ?", by Ulf Zibis
2014.12.27 22:24 "Re: [Tiff] PNG in TIFF ?", by Ulf Zibis
Am 23.12.2014 um 02:38 schrieb Scott Ribe:
> Were they noisy images? In all the testing I've ever done of documents, G4 was always > substantially smaller than any other for reasonably clean black-and-white images.
Yes, correct, they were noisy.
I also experienced another surprise. To create the multi-page TIFFs I used IrfanView (via Wine on Ubuntu), and I don't know, if IrfanView uses libtiff to work with TIFF files. There seems some randomness in the compression algorithm.
When I repeated the creation + compression from same PNG sources, the result was always smaller than from the first run for all compression algorithms. E.g. with G4, the first run created a 1.3 MB file, but the second run created a 899 kB file. If anybody is interested to compare, e.g. do they expand to exactly the same image data?, I can send those 2 files privately.
- Ulf