Hi! On Thu, Jul 1, 2010 at 18:12, Francesco Scaglioni <[email protected]> wrote: > Hi, > > I am trying to some-how match the RGB histogram of my camera > (derived from the built-in jpeg) to the true parameters > within the raw file. My question is : how are the > histograms in raw-studio calculate : are they obtained from > the built in jpeg or extrapolated from the raw data ? What > are the "cut-off" points for both the coloured "blown out" > dots on the histogram and for the exposure mask in the > preview ? > > Apologies if this is a stupid question. My hope is > eventually to have RGB histograms on-camera that accurately > reflect the data within the raw file.
Currently the histogram is showing sRGB output, that is a histogram of how an exported sRGB image would look. We don't use the embedded JPEG for anything else than the preview in the iconbox on top. Grey levels are calculated using Rec.709 luma values (Y in YCbCr) from the sRGB data. As you can see when you move the sliders, almost everything affects the histogram more or less (denoise doesn't). For the exact color flow in Rawstudio, I just made this blog post that sums up the different steps from Raw to final image: http://rawstudio.org/blog/?p=236 Regards, Klaus Post http://www.klauspost.com > > TIA > > > Francesco > > _______________________________________________ > Rawstudio-users mailing list > [email protected] > http://rawstudio.org/cgi-bin/mailman/listinfo/rawstudio-users > _______________________________________________ Rawstudio-users mailing list [email protected] http://rawstudio.org/cgi-bin/mailman/listinfo/rawstudio-users
