> On 07/12/2016 06:27 PM, Stefan Klinger wrote: > > (1) My ND-Filter creates a slight color cast, which I would like to > > undo semi-automatically: The recipe I have in mind would be to take > > two pictures of a white surface, once with and once without the > > optical filter in place. Using the same light source and camera WB, > > but different exposure to compensate for brightness, the difference > > between the two pictures should express the unwanted color cast. Can > > DT use this to calculate an inverse filter?
On 2016-Jul-23, Sebastian wrote with possible deletions: > It could be worth trying to copy the colors of picture without filter to > a picture taken with ND-filter using the Color mapping: > http://www.darktable.org/2013/04/color-mapping/ Can't this be done via WB? Color mapping feels too spooky, I have no clue what's going on. -- http://stefan-klinger.de o/X Send plain text messages only, not exceeding 32kB. /\/ \ ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
