RAW + sensor response curve + gamma + vendor/camera adjustments (!!!) --------------------------- = JPEG
The base curve summarizes sensor response, gamma and vendor/camera adjustments and provides you an image similar to the standard OOC JPEGs without any special "style" (vivid, landscape etc.) applied. Despite the fact you do not want linear image data, you can not get linear data because you can not isolate the sensor response curve JPEG - gamma - RAW --------------------------------------------------- = sensor response curve + vendor/camera adjustments (!!!) Regards, Markus PS: + and - are only placeholders, the applied operations are not simple additions or subtractions Am 31.12.2012 00:28, schrieb Eckhart Pedersen: > On 2012-12-30 23:20, Markus Jung wrote: >> The base curve combines three adjustments: Sensor nonlinearity, gamma >> and due to the way how the base curve is created, vendor specific >> in-camera-processing. To build a neutral base curve without the vendor >> characteristics, you need to have at least direct sensor access (-> >> custom firmware). It is quite obvious why we do not have neutral base >> curves ... Regards, Markus > > I apologize for not letting this matter rest, but I still do not > understand... > > According to what I know, there are two major differences from a RAW > file to a OOC jpgeg file. > > The first is that the RAW file needs some camera/sensor specific > interpretations, which are taken from the input profile. > > The second is that the RAW file is linear, while the JPGEG file already > has (standard!) gamma curve applied. > > A combination of (standard!) gamma curve plus input profile should thus > give a natural image. If it does not, something must be wrong according > to my knowledge. > > If there is a third factor, please explain what this is to me. > > I apologize if you think this thread annoying, I just wish to understand > who is wrong, and where exactly the error is. Thank you for your patience! > > Regards, > Eckhart Pedersen > > > ------------------------------------------------------------------------------ > Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, > MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current > with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft > MVPs and experts. ON SALE this month only -- learn more at: > http://p.sf.net/sfu/learnmore_123012 > _______________________________________________ > Darktable-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-users > ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_123012 _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
