issue154:darktable
Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
issue154:darktable [2020/03/05 17:10] – d52fr | issue154:darktable [2020/03/08 16:30] (Version actuelle) – andre_domenech | ||
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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' | 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' | ||
- | Dans ce numéro, j' | + | Dans ce numéro, j' |
**As you can see (below), we have “luma”, “chroma” and “edges”. You can keep your mouse over each word for a nice description. The description for “edge” says: “only changes results for luma and chroma tabs”. What this means is that ‘edge’ does not work on its own. It works only on edits from the previous tabs. In other words, it is dependent on changes in the previous two tabs. If you mouse-over any one of the three “empty” boxes, you will see white circles appear. These are your nodes. Some words will also appear in the four compass directions, these will change with each tab. In luma, they are, “coarse”, | **As you can see (below), we have “luma”, “chroma” and “edges”. You can keep your mouse over each word for a nice description. The description for “edge” says: “only changes results for luma and chroma tabs”. What this means is that ‘edge’ does not work on its own. It works only on edits from the previous tabs. In other words, it is dependent on changes in the previous two tabs. If you mouse-over any one of the three “empty” boxes, you will see white circles appear. These are your nodes. Some words will also appear in the four compass directions, these will change with each tab. In luma, they are, “coarse”, | ||
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+ | Comme vous pouvez le voir (ci-dessous), | ||
**Reset the graph once you have an idea of how it works. Now I want you to raise each node, one-by-one, to the maximum of three, and have a Mexican wave run across the graph from left to right. At first, it will seem awful. Then get better, then sort of not really make big changes as the wave rolls out the right-hand side of the screen. Now lift node two (2) and node four (4) somewhat. Take a snapshot of your image, then reset it. Compare the two images. There are also shortcuts built into the module, so if you right-click, | **Reset the graph once you have an idea of how it works. Now I want you to raise each node, one-by-one, to the maximum of three, and have a Mexican wave run across the graph from left to right. At first, it will seem awful. Then get better, then sort of not really make big changes as the wave rolls out the right-hand side of the screen. Now lift node two (2) and node four (4) somewhat. Take a snapshot of your image, then reset it. Compare the two images. There are also shortcuts built into the module, so if you right-click, | ||
Zoom into your image at least 1:1 and now adjust that line accordingly. Now switch from luma to chroma. You should still be able to see the darker triangle at the bottom. This works just like luma, but instead of light, obviously color. The same with the noise, it addresses color noise. Please feel free to play with this too, creating s-curves and Mexican waves across the graph. Don’t do it only in the positive, but in the negative too, so you can see where it changes. The only teacher here is experience. Notice that even if you make massive changes, the histogram changes only slightly. (We are tweaking only intensity).** | Zoom into your image at least 1:1 and now adjust that line accordingly. Now switch from luma to chroma. You should still be able to see the darker triangle at the bottom. This works just like luma, but instead of light, obviously color. The same with the noise, it addresses color noise. Please feel free to play with this too, creating s-curves and Mexican waves across the graph. Don’t do it only in the positive, but in the negative too, so you can see where it changes. The only teacher here is experience. Notice that even if you make massive changes, the histogram changes only slightly. (We are tweaking only intensity).** | ||
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+ | Remettez le graphique à zéro une fois que vous avez une idée de son fonctionnement. Maintenant, je voudrais que vous éleviez chaque nœud, un par un, à un maximum de trois, et vous avez une « ola » traversant le graphique de gauche à droite. Au début, il paraît affreux. Ensuite, c'est mieux, puis ça ne fait pas de gros changements quand la vague se déroule sur le côté droit de l' | ||
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+ | Agrandissez votre image à au moins 1:1 et maintenant ajustez cette ligne de la même manière. Passez maintenant de luma à chroma. Vous devriez pouvoir encore voir le triangle sombre du bas. Celui-ci marche juste comme luma, mais, au lieu d' | ||
**Though you can go totally nuts, you will find that bell curves make the best bases to edit from. Although my photo has clipping, it is clipping in an area I was going to cut off anyway, so pay that no heed. My phone camera’s sensor – is a lot smaller than that of my camera – so I need to take that into consideration. You may also have noticed, whist dragging, that there is an odd shape that follows your mouse inside the graph block. This is the amount of detail that you change at a time. To change this, you simply select a node and scroll your mouse wheel forward or backwards. The circle will increase or decrease. This, in turn, adjusts that sort of diamond shape behind your mouse cursor. Think of this as your z-axis edit. You can click your mouse pointer between nodes, and the cursor will create a high or a low without your nodes moving. They seem to be locked horizontally and move only in the vertical plane. However, if you look at the bottom of the box, you will notice four (4) triangles. They will allow you to move the nodes along the x-axis. ** | **Though you can go totally nuts, you will find that bell curves make the best bases to edit from. Although my photo has clipping, it is clipping in an area I was going to cut off anyway, so pay that no heed. My phone camera’s sensor – is a lot smaller than that of my camera – so I need to take that into consideration. You may also have noticed, whist dragging, that there is an odd shape that follows your mouse inside the graph block. This is the amount of detail that you change at a time. To change this, you simply select a node and scroll your mouse wheel forward or backwards. The circle will increase or decrease. This, in turn, adjusts that sort of diamond shape behind your mouse cursor. Think of this as your z-axis edit. You can click your mouse pointer between nodes, and the cursor will create a high or a low without your nodes moving. They seem to be locked horizontally and move only in the vertical plane. However, if you look at the bottom of the box, you will notice four (4) triangles. They will allow you to move the nodes along the x-axis. ** | ||
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+ | Bien que vous puissiez devenir fou, vous trouverez que les courbes en cloche font les meilleures bases de départ pour les modifications. Bien que mon image soit écrêtée, l' | ||
**Now for edge, you need to zoom in to the maximum, then move to a spot where low detail and high detail meet, for instance a wall and flowers. Even if you drag the nodes to the top and the bottom, the changes are minuscule. Remember I told you that it acts on the previous changes you made in the other tabs. Think of it as very fine tuning. Most of the time I do not even bother with this tab. | **Now for edge, you need to zoom in to the maximum, then move to a spot where low detail and high detail meet, for instance a wall and flowers. Even if you drag the nodes to the top and the bottom, the changes are minuscule. Remember I told you that it acts on the previous changes you made in the other tabs. Think of it as very fine tuning. Most of the time I do not even bother with this tab. | ||
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Questions? Comments? E-mail us on misc@fullcirclemagazine.org** | Questions? Comments? E-mail us on misc@fullcirclemagazine.org** | ||
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+ | Maintenant, pour les contours, nous avons besoin d' | ||
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+ | Vous noterez peut-être aussi une réglette sous le cadre du graphique. La fusion prendra vos modifications et amplifiera ou condensera vos modifications déjà faites. Vous pouvez passer sur opacité et prendre un des choix, mais je vous recommande de le laisser inactif car c'est ce que vous ajustez. N'ayez pas peur d' | ||
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+ | J' | ||
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+ | Des questions, des commentaires ? Envoyez-nous un mail à misc@fullcirclemagazine.org | ||
issue154/darktable.1583424629.txt.gz · Dernière modification : 2020/03/05 17:10 de d52fr