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July 2017

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2017.07.23 22:15 "JPEG2000 codec", by Roger Leigh
2017.07.24 00:34 "Re: JPEG2000 codec", by Kemp Watson
2017.07.24 15:46 "Re: JPEG2000 codec", by Bob Friesenhahn
2017.07.24 16:16 "Re: JPEG2000 codec", by Roger Leigh
2017.07.24 16:51 "Re: JPEG2000 codec", by Kemp Watson
2017.07.24 19:39 "Re: JPEG2000 codec", by Bob Friesenhahn
2017.07.24 21:49 "Re: JPEG2000 codec", by Bob Friesenhahn
2017.07.25 01:12 "Re: JPEG2000 codec", by Kemp Watson

2017.07.24 16:51 "Re: JPEG2000 codec", by Kemp Watson

Hi Roger:

Wešve done that with libtiff and OpenJPEG for a number of years, just
simply use them separately.

W. Kemp Watson

kemp@objectivepathology.com




Objective Pathology Services Limited

8250 Lawson Road
Milton, Ontario
Canada  L9T 5C6

www.objectivepathology.com
tel. +1 (416) 970-7284








On 2017-07-24, 12:16 PM, "Roger Leigh" <tiff-bounces@lists.maptools.org on
behalf of rleigh@codelibre.net> wrote:

>On 24/07/17 16:46, Bob Friesenhahn wrote:
>> On Mon, 24 Jul 2017, Leonard Rosenthol wrote:
>> 
>>> As with Kemp ­ I would ask the obvious questionŠ
>>>
>>> WHY?
>>>
>>> JP2K already has an excellent (and ISO standardized!) file format to
>>> go along with the codecs.  Why would you want to put it inside a
>>> proprietary file format like TIFF??
>> 
>> Perhaps one reason would be that the freely available JP2K libraries do
>> not adequately support these features.  JP2K in TIFF at least allows
>> scaling up the image to any image size supported by TIFF/BigTIFF
>> (virtually unlimited) by using reasonably sized strips or tiles, and
>> allows using any existing TIFF tags.
>
>To answer all the questions, my purpose is for reading and writing of
>"big" digital pathology images, which might well include existing Aperio
>files, or conversion or creation of new files in a similar format.  The
>format itself would be OME-TIFF.
>
>We might well use standard J2K files as well, but we embed other
>metadata in the OME-TIFF, and support multiple images in TIFF which can
>use different compression formats etc., which makes using TIFF have some
>advantages over J2K.
>
>
>Regards,
>Roger
>_______________________________________________
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>http://www.remotesensing.org/libtiff/