Where do I find a description of the meaning of these luminance values? How are they intended to change the colour values of the image? Andreas Regina Henschel <
regina.henschel@libreoffice.org> wrote: Hi all, attached is a test document for issue OFFICE-3821 "ODF1.2 draw:luminance (part 1, 20.135): The value description is contrary to the data type." The file has been written by Apache OpenOffice. It contains an embedded .png picture with +15%, -15%, +30%, and -30% luminance filter applied. Kind regards Regina