use of Jpeg2000 ?

[Ricaille Tanguy]

Hi,
i use the actual FWTools...
Sorry, but i can't give the image.
Thanks.

Tanguy

----- Original Message ----- 
From: "Frank Warmerdam" <warmerdam at pobox.com>
To: "Ricaille Tanguy" <tanguy.ricaille at TRASYS.LU>
Cc: <MAPSERVER-USERS at LISTS.UMN.EDU>
Sent: Thursday, February 09, 2006 5:13 PM
Subject: Re: [UMN_MAPSERVER-USERS] use of Jpeg2000 ?


> Ricaille Tanguy wrote:
> > Hi,
> > i have jp2 files in approximately 927*927 pixels in 4 multispectral
bands,
> > coded in 16bits, and i need to provide 500*500 pixels in 3 multispectral
> > bands, coded in 8 bits, as a quick look for this image.
> >
> > I try to use gdal_translate -ot Byte -of JPEG -b 1 -b 2 -b 3 test.jp2
> > test.jpeg, but result is completly black.
> > I have try ather parameter and it is each time the same result.
>
> Tanguy,
>
> This looks like it should work, or might give a saturated white result.
> If you add -scale, it should rescale for you too.
>
> eg.
> gdal_translate -ot Byte -scale -of JPEG -b 1 -b 2 -b 3 test.jp2 test.jpg
>
> But that does not appear to be the issue since you are getting black.
> Could you make your image available for me to try?  Also, what GDAL
> build are you using?  FWTools? your own?
>
> Best regards,
> -- 
> ---------------------------------------+----------------------------------
----
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>
>