OK thank you and for retrieving the RAW values of the channels and how to know if the ranges are 0 - 255 or 0 - 65535 please ? Sylvain Ard 0549507724 0778380991 [email protected] http://sylvain-ard.fr Entreprise individuelle SIRET : 80079243400022 Appt 26 Bât A Résidence Le Patio 83 rue de la Bugellerie 86000 Poitiers
Le mer. 27 avr. 2022 à 14:05, <[email protected]> a écrit : > Hello Sylvian, > > > Le sam. 23 avr. 2022 à 21:59, Sylvain Ard <[email protected]> a > écrit : > >> 1 : I want to know with libtiff the LAB encodage of the TIFF ie CIELAB, > ICCLab ou JPEG Fax > > It's D65 CIELAB. > > >> 2 : I want to know the bits number per LAB channel by libtiff > >> 3 : I want to get the RAW LAB channels values of a pixel with libtiff > > It's usually 8 or 16 bits unsigned, with L 0 - 100 and ab +/- 128 all > scaled to 0 - 255 or 0 - 65535 in the obvious way. > > John >
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