[sane-devel] gamma tables

m. allan noah kitno455 at gmail.com
Fri Jul 30 18:52:24 UTC 2010



On Fri, Jul 30, 2010 at 2:43 PM, Grant <emailgrant at gmail.com> wrote:
>> First you must make sure that the backend you are using supports the
>> gamma table options. Some do not, and just have brightness/contrast
>> type controls.
>> allan
> Hi Allan,
> I can use either the epson2 backend or epkowa and I think one or the
> other supports gamma tables.  Can you tell me how to determine the
> gamma, shadow, and highlight values?
> - Grant
>>> Since my scans are for on-screen display only, I'd like to use a gamma
>>> table in place of an ICC profile.  It sounds like I need to determine
>>> values for gamma, shadow, and highlight so gamma4scanimage can
>>> generate the gamma table.  How can I determine those values?  Am I
>>> supposed to scan targets?
>>> - Grant
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