issue155:tutoriel2
Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédente | Dernière révisionLes deux révisions suivantes | ||
issue155:tutoriel2 [2020/04/07 09:36] – philou511 | issue155:tutoriel2 [2020/04/07 09:37] – philou511 | ||
---|---|---|---|
Ligne 33: | Ligne 33: | ||
**Let’s start with black-and-white. There is a reason there are two triangles with exclamation marks in the top bar. Think of them as ‘clipping’ black and white. You will see eight points marked on your histogram, if you are using the above picture. Too many, I think for a simple image like this. You can remove some by clicking and holding and dragging the point to the very bottom. They should turn red as you mouse-over them, then, as you drag them off the bottom, the line should snap back. Should you make any mistakes, just click “auto matched tone curve” and it should be reset. From the left, I want you to remove the second and third dot or pin. Also I want you to remove the second-last pin. Your histogram should have only five pins. The image has almost no black, so we can drag the leftmost pin until where our histogram starts rising. Keep an eye on your picture whilst doing this. This should cause the shadow of the yacht to become more pronounced. Bring your rightmost pin a block in also, to help with the bright white in the sky. Now click the two triangles with exclamation points in them in the menu. YUK! you may say. Relax, this is showing you where pure white and pure black exist within your picture, It does not change anything. You can turn them off now.** | **Let’s start with black-and-white. There is a reason there are two triangles with exclamation marks in the top bar. Think of them as ‘clipping’ black and white. You will see eight points marked on your histogram, if you are using the above picture. Too many, I think for a simple image like this. You can remove some by clicking and holding and dragging the point to the very bottom. They should turn red as you mouse-over them, then, as you drag them off the bottom, the line should snap back. Should you make any mistakes, just click “auto matched tone curve” and it should be reset. From the left, I want you to remove the second and third dot or pin. Also I want you to remove the second-last pin. Your histogram should have only five pins. The image has almost no black, so we can drag the leftmost pin until where our histogram starts rising. Keep an eye on your picture whilst doing this. This should cause the shadow of the yacht to become more pronounced. Bring your rightmost pin a block in also, to help with the bright white in the sky. Now click the two triangles with exclamation points in them in the menu. YUK! you may say. Relax, this is showing you where pure white and pure black exist within your picture, It does not change anything. You can turn them off now.** | ||
- | Commençons par le noir et le blanc. Les trois triangles avec des points d' | + | Commençons par le noir et le blanc. Les trois triangles avec des points d' |
**Let me talk about the three sliders above your histogram. Lightness, contrast and saturation are all well and good, but Rawtherapee supports L.a.b. colours as well. In L.a.b., the Luminance can change contrast without saturation. This is important when you need to change the lighting, but keep the saturation the same. If you turn up the contrast to about 35-40, you will see the water come alive, yet the yacht will become a black blob, which is not ideal. The opposite happens when you turn the contrast down, the life seems to drain from your picture. Contrast in a photo is very important. This gives life and depth to an otherwise mundane picture. I know that sounds weird, but it is true. If you just want to copy what the guy did in the picture above, turn the contrast up full, then go to the white balance icon and drag the red/blue slider all the way to red, and you are done. | **Let me talk about the three sliders above your histogram. Lightness, contrast and saturation are all well and good, but Rawtherapee supports L.a.b. colours as well. In L.a.b., the Luminance can change contrast without saturation. This is important when you need to change the lighting, but keep the saturation the same. If you turn up the contrast to about 35-40, you will see the water come alive, yet the yacht will become a black blob, which is not ideal. The opposite happens when you turn the contrast down, the life seems to drain from your picture. Contrast in a photo is very important. This gives life and depth to an otherwise mundane picture. I know that sounds weird, but it is true. If you just want to copy what the guy did in the picture above, turn the contrast up full, then go to the white balance icon and drag the red/blue slider all the way to red, and you are done. |
issue155/tutoriel2.txt · Dernière modification : 2020/04/07 18:47 de andre_domenech