R: [Gdal-dev] 8-bit grayscale

Sanges Michele Michele.Sanges at otomelara.it
Wed Jul 7 04:25:04 EDT 2004



> -----Messaggio originale-----
> Da: Andrey Kiselev [mailto:dron at ak4719.spb.edu]
> Inviato: sabato 3 luglio 2004 11.03
> A: gdal-dev at xserve.flids.com
> Oggetto: Re: [Gdal-dev] 8-bit grayscale
> 
> It is not possible to wrap an arbitrary dataset into 8-bit. Any good
> viewer for non-8bit data should have several scaling 
> algorithms: linear
> stretch (as in your code), equalization, logarithmic stretch. User can
> select one of them which will be best suited for particular 
> dataset. We
> don't know, what parts of image are interesting for user. 
> Ocean and land
> on the single space image will have significantly different histograms
> and user will use different methods to highlight water or 
> land depending
> on his interests.
> 
> 						Regards,
> 						Andrey


Hi Andrey,
thanks for your reply.
Ok, so can you give me some references (internet sites, documents, ...) that speaking about the different scaling algorithms?

Best regards.
Michele



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