Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread KOVÁCS István
One more thing regarding the colour picker: it works in your display's colour space, which may affect its Lab readings - the devs would know. https://www.darktable.org/usermanual/ch03s03s04.html.php darktable user

Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread KOVÁCS István
My bad, sorry, I thought the card had colour patches, too - I've only ever used a simple Whibal card, and does not provide Lab values. Also, I don't understand why you mentioned exposure in your post, I thought you expected darktable to adjust it automatically when you picked white balance from

Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread Emmanuel Lacour
Le 05/09/2016 à 13:47, KOVÁCS István a écrit : > Hi, > > If I get this correctly, the card has grey patches as well as colour ones. no, only grey (and blck/white, but I don't really use them): http://www.scuadra.fr/en/charte.php?Language=en it's mostly for WB > The spot white balance tool

Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread KOVÁCS István
Hi, If I get this correctly, the card has grey patches as well as colour ones. The spot white balance tool adjusts white balance only, meaning that: - after adjustments, grey should be grey (neutral) - exposure is to be done independently - colour in non-grey patches, as well as the lightness of

Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread Emmanuel Lacour
Le 05/09/2016 à 11:13, Sebastian a écrit : > Have you tried the spot white balance preset? > > See also https://www.darktable.org/usermanual/ch03s04.html.php#whitebalance > > that's what I use, but after using the spot WB, I check the Lab values using the color picker on the same area and

Re: [darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-05 Thread Sebastian
Have you tried the spot white balance preset? See also https://www.darktable.org/usermanual/ch03s04.html.php#whitebalance On 09/04/2016 07:51 PM, Emmanuel Lacour wrote: > Dear DT users, > > > I have a TruColor grey card, and I just saw that when I use the WB > module to spot on it, the measured

[darktable-user] White balance on a TrueColor scuadra, using provided Lab values

2016-09-04 Thread Emmanuel Lacour
Dear DT users, I have a TruColor grey card, and I just saw that when I use the WB module to spot on it, the measured Lab values are not the one written on the card. Trying to adjust using the sliders of the WB module is a night mare :( Isn't there another way to accuratly adjust WB using this