issue153:darktable
Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
issue153:darktable [2020/02/05 19:59] – d52fr | issue153:darktable [2020/02/07 15:17] (Version actuelle) – d52fr | ||
---|---|---|---|
Ligne 4: | Ligne 4: | ||
White balance, what is it? Well, it is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Sounds simple, doesn’t it? Whilst most of us play it by eye, there is a way to set your white balance without ogling the picture every five seconds. Truth! ** | White balance, what is it? Well, it is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Sounds simple, doesn’t it? Whilst most of us play it by eye, there is a way to set your white balance without ogling the picture every five seconds. Truth! ** | ||
+ | |||
+ | Si vous suivez nos tutoriels sur Darktable, vous savez que nous travaillons avec la dernière version, et non celle du Centre de logiciels d' | ||
+ | |||
+ | Avertissement : je ne suis nullement un expert en traitement des photos. Je connais simplement un gars qui a un chien qui m'a donné des puces. Je pensais que je pouvais vous aider à vous gratter aussi. | ||
+ | |||
+ | La balance des blancs, c'est quoi ? C'est le processus de suppression des couleurs non réalistes, de sorte que les objets qui apparaissent blancs en réel soient rendus blancs sur votre photo. Ça paraît simple, n' | ||
**What you need to know: | **What you need to know: | ||
Ligne 12: | Ligne 18: | ||
So the fastest way to set the white balance is to select a pure white, or neutral reference, in your photo. That’s it, and I will show you how a bit later. The other way is to change your histogram in Darktable to waveform and try to align the colors. The two modules you will need are white balance and color correction.** | So the fastest way to set the white balance is to select a pure white, or neutral reference, in your photo. That’s it, and I will show you how a bit later. The other way is to change your histogram in Darktable to waveform and try to align the colors. The two modules you will need are white balance and color correction.** | ||
+ | |||
+ | Ce qu'il faut savoir | ||
+ | |||
+ | Bien que vous puissiez ajuster la balance des blancs sur des fichiers .jpg, c'est plus facile et plus habituel de l' | ||
+ | |||
+ | Avant que je m' | ||
+ | |||
+ | Aussi, la façon la plus rapide de régler la balance des blancs est de sélectionner un blanc pur, ou une référence neutre, dans votre photo. C'est tout, et je vous montrerai comment dans peu de temps. L' | ||
**If you look at my histogram here, you will see that blue is high and red is low. To get a more natural color, I need to raise the reds and lower the blues, without creating color casts. As this picture is a .jpeg-file, my chances of changing it much without making it unrealistic are slim. With RAW images, it is another ball-game altogether. This is why any photographer worth his salt shoots in RAW format. My father used to spend hours fiddling, setting his camera settings, before taking a photo. In effect, doing all this processing prior to getting a shot off. Let’s call it pre-processing, | **If you look at my histogram here, you will see that blue is high and red is low. To get a more natural color, I need to raise the reds and lower the blues, without creating color casts. As this picture is a .jpeg-file, my chances of changing it much without making it unrealistic are slim. With RAW images, it is another ball-game altogether. This is why any photographer worth his salt shoots in RAW format. My father used to spend hours fiddling, setting his camera settings, before taking a photo. In effect, doing all this processing prior to getting a shot off. Let’s call it pre-processing, | ||
+ | |||
+ | Si vous regardez mon histogramme (en bas à gauche), vous verrez que le bleu est fort et le rouge, faible. Pour obtenir des couleurs plus naturelles, j'ai besoin d' | ||
**Open your picture in Darktable with the two modules that I mentioned. Go to your white balance module and you will see this: | **Open your picture in Darktable with the two modules that I mentioned. Go to your white balance module and you will see this: | ||
Ligne 20: | Ligne 36: | ||
You can also tweak it by hand. Open your color contrast and you will see “green vs. magenta” and “blue vs. green”. Right-click on the sliders to get the mouse adjustment curves or inch your sliders left and right very carefully. You should be able to get the same results as with the white balance. When adjusting a landscape photo, keep your eyes on the clouds, Pink clouds are not uncommon, but you do not see them in the middle of the day.** | You can also tweak it by hand. Open your color contrast and you will see “green vs. magenta” and “blue vs. green”. Right-click on the sliders to get the mouse adjustment curves or inch your sliders left and right very carefully. You should be able to get the same results as with the white balance. When adjusting a landscape photo, keep your eyes on the clouds, Pink clouds are not uncommon, but you do not see them in the middle of the day.** | ||
+ | |||
+ | Ouvrez votre image dans Darktable avec les deux modules que j'ai mentionné. Allez dans le module de la balance des blancs et vous verrez ceci : | ||
+ | |||
+ | Vous verrez « Préréglage » avec un triangle à droite. Agrandissez-le et modifiez-le pour « Ponctuel ». Ceci vous permettra de sélectionner un point de votre image qui est aussi blanc que possible. Cette sélection guidera l' | ||
+ | |||
+ | Vous pouvez aussi l' | ||
**Don’t be afraid to open the same picture in another editor like RawTerapee and adjust it there. Different tools have different algorithms and sometimes one makes it perfect in one go. You can now mimic those settings in Darktable to get your perfect picture. Once you have your white balance sorted, you can start layering things on like HDR and masks. However, keep your eye on your histogram always. | **Don’t be afraid to open the same picture in another editor like RawTerapee and adjust it there. Different tools have different algorithms and sometimes one makes it perfect in one go. You can now mimic those settings in Darktable to get your perfect picture. Once you have your white balance sorted, you can start layering things on like HDR and masks. However, keep your eye on your histogram always. | ||
Ligne 29: | Ligne 51: | ||
Questions? Comments? E-mail us on misc@fullcirclemagazine.org** | Questions? Comments? E-mail us on misc@fullcirclemagazine.org** | ||
+ | N'ayez pas peur d' | ||
+ | |||
+ | ASTUCE : Après avoir ajusté votre balance des blancs, et si votre photo était en plein soleil, ajoutez le module de balance des couleurs. Maintenant, ajustez l' | ||
+ | |||
+ | C'est cela la balance des blancs, la main dans le cambouis. Bien sûr, il y a derrière ça de nombreuses théories et méthodes pratiques, mais ça devrait être suffisant pour que vous puissiez l' | ||
+ | |||
+ | Des questions ? Des commentaires ? Envoyez-nous un mail à misc@fullcirclemagazine.org |
issue153/darktable.1580929188.txt.gz · Dernière modification : 2020/02/05 19:59 de d52fr