issue146:tutoriel1
Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentesRévision précédente | Prochaine révisionLes deux révisions suivantes | ||
| issue146:tutoriel1 [2019/07/15 07:21] – d52fr | issue146:tutoriel1 [2019/07/15 09:35] – auntiee | ||
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| We are working with a noisy picture from the Pentax forums. If you are just joining us, the picture was stolen from here: https:// | We are working with a noisy picture from the Pentax forums. If you are just joining us, the picture was stolen from here: https:// | ||
| - | Bienvenue pour un autre aperçu rapide du très puissant et largement sous-évalué Darktable. Nous travaillons avec la version 2.6 et PAS celle fournie par Ubuntu. | + | Bienvenue pour un autre aperçu rapide du très puissant et largement sous-évalué Darktable. Nous travaillons avec la version 2.6 et PAS avec celle fournie par Ubuntu. |
| Nous travaillons avec une image bruitée issue des forums Pentax. Si vous nous rejoignez maintenant, l' | Nous travaillons avec une image bruitée issue des forums Pentax. Si vous nous rejoignez maintenant, l' | ||
| Ligne 17: | Ligne 17: | ||
| J' | J' | ||
| - | Darktable 2.6 apporte | + | Darktable 2.6 apporte |
| **You may wonder about these blocks. They are scales. Feel free to mouse over them to read the tool tips. Adding scales, is like adding layers of granularity. If you add two, you will have a rough / coarse and a smooth / fine layer. Add two more and you break each of those into the same. Get the idea? You can think of it like music scales. We will play later, for now, I would just like to give you an overview and brief explanation. If you look below the blocks, you will see retouch tools, with shapes in the top row and algorithms in the bottom. Mouse over each to identify them. It will tell you what they are, but not what they do. This is where your friendly Full Circle Magazine steps in and explains what each one does. (Just not right now, keep reading). | **You may wonder about these blocks. They are scales. Feel free to mouse over them to read the tool tips. Adding scales, is like adding layers of granularity. If you add two, you will have a rough / coarse and a smooth / fine layer. Add two more and you break each of those into the same. Get the idea? You can think of it like music scales. We will play later, for now, I would just like to give you an overview and brief explanation. If you look below the blocks, you will see retouch tools, with shapes in the top row and algorithms in the bottom. Mouse over each to identify them. It will tell you what they are, but not what they do. This is where your friendly Full Circle Magazine steps in and explains what each one does. (Just not right now, keep reading). | ||
| Ligne 23: | Ligne 23: | ||
| I like taking pictures at air shows, but I often find that at maximum zoom, I see spots or dust or lint when I review my pictures afterwards. Spot removal is basically copy and paste, and you can usually see it. (Why is the sky not uniformly blue?). The new heal tool is that plus blending into the surrounding pixels. So you will probably love it too.** | I like taking pictures at air shows, but I often find that at maximum zoom, I see spots or dust or lint when I review my pictures afterwards. Spot removal is basically copy and paste, and you can usually see it. (Why is the sky not uniformly blue?). The new heal tool is that plus blending into the surrounding pixels. So you will probably love it too.** | ||
| - | Ces blocs vous posent peut-être des questions. Ce sont des échelles. | + | Ces blocs vous posent peut-être des questions. Ce sont des échelles. |
| - | J'aime prendre des photos dans les meetings aériens, mais je trouve souvent, qu'au zoom maximum, je vois des points ou de la poussière ou de la peluche quand je revois mes images après coup. La suppression des points est comme un copier/ | + | J'aime prendre des photos dans les meetings aériens, mais je trouve souvent, qu'au zoom maximum, je vois des points ou de la poussière ou de la peluche quand je revois mes images après coup. La suppression des points est comme un copier/ |
| **Before we go using all these tools, or perhaps you have already – I am going to bring your attention back to the scales. You will notice a red box inside the very first rectangle. This is where you are currently editing. Moving up the scale to the right is a lot like ‘onion skinning’ - adding another “layer” through which the picture appears more grainy. To get a feel for this, add five scales (by dragging the bottom triangle right) and look just below the blocks, the very first icon ‘display wavelet scale’, click on it. Now click on the first block, then the second, and so on, to see the image change as your red block moves within the rectangles, which has now turned grey. You can go past your level of scale (past the white rectangle), but this is pointless. Whilst clicking through your scales again, look at the histogram in the top right. See how the angle widens between the first and fifth block. You will also have noticed a new slider with three triangles on it where it says, ‘preview single scale’. You are welcome to play with those, and to the right of that you will see what looks like a trident. This is the ‘auto levels’, which will adjust your histogram to the ‘best’ settings, defined by the algorithm. Only on that one layer you are on.** | **Before we go using all these tools, or perhaps you have already – I am going to bring your attention back to the scales. You will notice a red box inside the very first rectangle. This is where you are currently editing. Moving up the scale to the right is a lot like ‘onion skinning’ - adding another “layer” through which the picture appears more grainy. To get a feel for this, add five scales (by dragging the bottom triangle right) and look just below the blocks, the very first icon ‘display wavelet scale’, click on it. Now click on the first block, then the second, and so on, to see the image change as your red block moves within the rectangles, which has now turned grey. You can go past your level of scale (past the white rectangle), but this is pointless. Whilst clicking through your scales again, look at the histogram in the top right. See how the angle widens between the first and fifth block. You will also have noticed a new slider with three triangles on it where it says, ‘preview single scale’. You are welcome to play with those, and to the right of that you will see what looks like a trident. This is the ‘auto levels’, which will adjust your histogram to the ‘best’ settings, defined by the algorithm. Only on that one layer you are on.** | ||
issue146/tutoriel1.txt · Dernière modification : 2019/07/17 06:41 de andre_domenech