2014.12.21 20:12 "[Tiff] PNG in TIFF ?", by Ulf Zibis

2014.12.22 03:19 "Re: [Tiff] PNG in TIFF ?", by Bob Friesenhahn

On Sun, 21 Dec 2014, Toby Thain wrote:

On 21/12/14 9:29 PM, Bob Friesenhahn wrote:

It would be more interesting to get the compression algorithm from Google's WebP or HVEC as used by the BGP image format (http://bellard.org/bpg/) into TIFF.

WebP (VP8 derivative) does not work for large images, but it would

I've worked a bit with WebP. What size limit do you have in mind here?

I just tried a 8k x 8k encode and it failed with "WebP encoding failed: partition 0 overflow (> 512K)" but a 7k x 7k encode succeeded. There is a certain point where this happens, and it is image dependent. The limits are much smaller than IJG JPEG (given sufficent memory). 64k x 64k works with IJG JPEG.

Regardless, TIFF strips and tiles would be in WebP's sweet spot.

Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/