[gdal-dev] Is it a big thing to change ECW to support 16-bit imagery?

[Ivan Lucena]

Mo,

See, GDAL does not implement the code that actually reads the ECW 
format. The GDAL ECW driver just make calls to a external library. That 
library is provided by the company that holds the copyright for that 
format [1]. So you would need to ask and negotiate with then first.

But I believe that they probably have thought about that before and 
maybe that *is* a "big thing", as you said. It is not just a matter of 
storing pixels values but it is matter of running a algorithm to 
calculate the wavelets. Or maybe is just because that is how and why the 
format was designed. I mean, for byte image.

But if they *do* decided to implement that change I believe it will be 
pretty simple for anyone of the GDAL driver's developers to make the 
necessary changes to adapt to it.

But like I said before, don't hold you breath waiting for that. I don't 
think that there is a chance.

[1] http://www.gdal.org/frmt_ecw.html

My best regards,

Ivan

mohwawang wrote:
> Mateusz,
> 
> License issue can be resolved through negotiation. Then back to the technique issue: Is it a big thing to change ECW to support 16-bit imagery?
> 
> Mo  
> 
> --- On Fri, 3/27/09, Mateusz Loskot <mateusz at loskot.net> wrote:
> 
>> From: Mateusz Loskot <mateusz at loskot.net>
>> Subject: Re: [gdal-dev] Is it a big thing to change ECW to support 16-bit imagery?
>> To: "mohwawang" <mohwawang at yahoo.com>
>> Cc: gdal-dev at lists.osgeo.org
>> Date: Friday, March 27, 2009, 7:31 PM
>> mohwawang wrote:
>>> Mateuse,
>>>
>>> So what's the answer to the "correct" question?
>> Read the license.
>>
>> Best regards,
>> -- 
>> Mateusz Loskot, http://mateusz.loskot.net
>> Charter Member of OSGeo, http://osgeo.org
>>
> 
> 
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