Re: [Tiff] JPEG2000 support

2022-04-04 Thread Kemp Watson via Tiff 
It's indeed used in slide imaging fairly commonly, but with
"non-conforming" TIFFtags (33003 and 33005 instead of 34712), and
essentially to Leonard's point... why?
It's a historical artifact from 20-year-old CPUs: the tradeoff here is
essentially a Gaussian pyramid for speed vs a Laplacian pyramid for
compression.

JPEG 2000 pyramid support is actually quite fabulous, to the point of
"pyramidal is what JPEG 2000 is, all the way through".
 Its browser compatibility is quite a bit less so...

Kemp Watson

On Mon, Apr 4, 2022 at 10:30 AM  wrote:

> Tiled pyramidal TIFF, with jp2k compression for tiles, is quite
> commonly used for slide imaging.
>
> jp2k format pyramid support is not great, unfortunately.
>
>
> On Mon, 4 Apr 2022 at 14:00, Leonard Rosenthol via Tiff
>  wrote:
> >
> > Just out of curiosity, why would you want to do that?
> >
> >
> >
> > JPEG2000 offers it own, ISO standardized, image file format container.
> What is the benefit of putting JP2K compression into TIFF?   Are you
> thinking about the lossy or lossless options?
> >
> >
> >
> > Leonard
> >
> >
> >
> > From: Tiff  on behalf of miguel medalha <
> medal...@sapo.pt>
> > Date: Friday, April 1, 2022 at 2:35 PM
> > To: tiff@lists.osgeo.org 
> > Subject: [Tiff] JPEG2000 support
> >
> > Hello
> >
> > Are there any plans to include JPEG2000 compression (OpenJPEG, for
> example)?
> >
> > Thank you.
> >
> >
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Re: [Tiff] JPEG2000 support

2022-04-04 Thread jcupitt 
Tiled pyramidal TIFF, with jp2k compression for tiles, is quite
commonly used for slide imaging.

jp2k format pyramid support is not great, unfortunately.


On Mon, 4 Apr 2022 at 14:00, Leonard Rosenthol via Tiff
 wrote:
>
> Just out of curiosity, why would you want to do that?
>
>
>
> JPEG2000 offers it own, ISO standardized, image file format container.  What 
> is the benefit of putting JP2K compression into TIFF?   Are you thinking 
> about the lossy or lossless options?
>
>
>
> Leonard
>
>
>
> From: Tiff  on behalf of miguel medalha 
> 
> Date: Friday, April 1, 2022 at 2:35 PM
> To: tiff@lists.osgeo.org 
> Subject: [Tiff] JPEG2000 support
>
> Hello
>
> Are there any plans to include JPEG2000 compression (OpenJPEG, for example)?
>
> Thank you.
>
>
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Re: [Tiff] JPEG2000 support

2022-04-04 Thread Leonard Rosenthol via Tiff 
Just out of curiosity, why would you want to do that?

JPEG2000 offers it own, ISO standardized, image file format container.  What is 
the benefit of putting JP2K compression into TIFF?   Are you thinking about the 
lossy or lossless options?

Leonard

From: Tiff  on behalf of miguel medalha 

Date: Friday, April 1, 2022 at 2:35 PM
To: tiff@lists.osgeo.org 
Subject: [Tiff] JPEG2000 support
Hello

Are there any plans to include JPEG2000 compression (OpenJPEG, for example)?

Thank you.


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Re: [Tiff] JPEG2000 support

2022-04-01 Thread Kemp Watson via Tiff 
It's pretty straightforward to do it yourself via the "RawTile" calls.

Kemp Watson

On Fri, Apr 1, 2022 at 2:34 PM miguel medalha  wrote:

> Hello
>
> Are there any plans to include JPEG2000 compression (OpenJPEG, for
> example)?
>
> Thank you.
>
>
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[Tiff] JPEG2000 support

2022-04-01 Thread miguel medalha 
Hello

Are there any plans to include JPEG2000 compression (OpenJPEG, for example)?

Thank you.


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