I read http://www.darktable.org/2012/12/profiling-sensor-and-photon-noise/ and want to create noise profile images with a Pentax KP.
> take one shot per iso. 1 step ISO, 1/2 steps or 1/3 steps? Smaller steps will produce a lot of photos, the Pentax KP supports 819200 ISO. > it has to be out-of-focus and have a widespread histogram, i.e. be > over- and underexposed at the same time (see example image below). if > you want to be thorough, take 2-3 to verify the numbers. So it should not be a normal sharp nightshot, but something out of focus, eg a street lamp in the night? > this image looks very green, because the `raw linear' style has been > applied to it (find it in darktable/tools/noise). this makes sure we > get linear camera raw rgb with no basecurves, no whitebalance, etc in > the way. it is essential that you apply this style. So I have to change the camera to RGB? Are sRGB *and* RGB photos wanted? Al ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
