Difference between revisions of "GIMP/C2/Adjusting-Colours-Using-Layers/English-timed"
From Script | Spoken-Tutorial
PoojaMoolya (Talk | contribs) |
|||
| Line 215: | Line 215: | ||
|- | |- | ||
| 06.51 | | 06.51 | ||
| − | |Perhaps here you can slide the opacity slider a bit down to get a good colour and you can play with these sliders which | + | |Perhaps here you can slide the opacity slider a bit down to get a good colour and you can play with these sliders which gives real hand full of possibilities to change the color here. |
Revision as of 12:25, 13 December 2013
| Time | Narration
|
| 00.22 | Welcome to Meet the Gimp. My name is Rolf Steinort and I’m recording this in Bremen, Northen Germany.
|
| 00.29 | In the previous edition I got this image here after editing |
| 00.33 | And today I think I should do something to set the colors. |
| 00.39 | Because this image is too green.
|
| 00.41 | There are lot of ways to adjust the color and one of them is the Curve Tool. |
| 00.47 | I click on the curves tool in tool box and then I select the green channel and pull the curve down. |
| 00.55 | Now you can see that the colour channels and the fog in the image looks like the real fog.
|
| 01.02 | Now, I have to adjust the curve in such a way that I get an image which is gray and not green or magenta. |
| 01.13 | I don’t want to use curves tool because it damages the details of the image and I can’t correct the damage afterwards |
| 01.23 | I could use the undo tool but I’ll have to redo all the steps after that. |
| 01.28 | So I want to have something that’ll not damage the image and I can adjust later on. |
| 01.34 | There is such a way which uses a simple filter with layers |
| 01.39 | So I have open here the layer dialog. |
| 01.43 | You’ll see here background which is our original image. |
| 01.47 | And I simply add a new layer and I select white in Layer Fill Type and give it a name, color correction green. |
| 01.59 | Now my image is fully white but I can change the layer mode. |
| 02.05 | The layer mode is an algorithm which combines the two layers i.e the original background layer and the newly created layer. |
| 02.16 | So I choose here the Multiple mode. |
| 02.22 | And you get the original image back as it was before. |
| 02.27 | The Multiply mode, multiplies the pixels from the background to the pixels from the foreground, and divides the result by 255. |
| 02.37 | And in a white picture all the color channels are 255, so multiplying by 255 and dividing by 255 gives the starting point i.e. Background
|
| 02.52 | But if I reduce one channel in the new layer, it will be reduced in the background also because multiplying by say 200 and dividing by 255 gives less. |
| 03.06 | Now i want to select such a color which has a reduced green channel. |
| 03.12 | Here I have black as foreground colour, which i change to background colour and white as foreground colour and you can see that red, green & blue all colour channels have same value i.e 255.
|
| 03.31 | By the way don’t be distracted by the colours on the slider here. |
| 03.36 | This is not blue, this is yellow but when I slide this down to a certain point, you see that colours in all the slider change automatically. |
| 03.50 | Ok I select the green slider here and pull the slider to say something around 211.
|
| 03.59 | And I pull the colour which I got as my foreground colour into my image and I get the result which is way to magenta. |
| 04.10 | But I can adjust the intensity of my green reduction with the help of the opacity slider. |
| 04.19 | And when I go back to zero I get the old image, and when I pull the slider up I can reduce the green channel in the image and also avoid getting magenta into the image. |
| 04.35 | I think this looks quite good. |
| 04.38 | By using the layers tool I can do changes anytime I want to and also I can do fine adjustments when more layers are stacked onto it and the change will stay even if I change something in underlying picture.
|
| 04.55 | There are still changes to be made in this layer as now it appears gray and I want to add a bit of blue.
|
| 05.03 | Again I follow the same procedure and make a new layer and called it color correction blue. |
| 05.11 | And now I want to add a little bit of blue. |
| 05.15 | For adding blue in the image, I use the Screen mode which is a little bit more complicated than Multiply mode. |
| 05.24 | In screen mode the colors are 1st inverted and then multiplied and divided and quite complicated. |
| 05.33 | Let me change the foreground colour to black and add the colour i want to add directly and now I have to add a little bit of blue |
| 05.43 | So slide down the blue slider a bit. |
| 05.47 | And drag the colour into the image. |
| 05.51 | This here is supposed to be blue, which looks still like black but it is very dark blue. |
| 05.59 | Look at the image here and when I switch this off, you see the change |
| 06.04 | The image is definitely bluish. |
| 06.08 | I can switch off both the new layers and by that you get the starting point. |
| 06.13 | When I click on the 1st layer we see the reduced channel of green and when I click on 2nd layer it adds a bit blue colour. |
| 06.22 | I think this is too much blue so I reduce the opacity. |
| 06.27 | I think this looks good. |
| 06.30 | I can adjust it later on all the time. |
| 06.33 | The layer tool is very powerful because you can create layer upon layers and in each layer you can change the pixels which are coming up from the lower layer |
| 06.44 | Possibilities of doing the correction is limitless and you can do it whenever you want. |
| 06.51 | Perhaps here you can slide the opacity slider a bit down to get a good colour and you can play with these sliders which gives real hand full of possibilities to change the color here.
|
| 07.05 | I think I have to cover the layer tool in detail on a special show but for today this is enough. |
| 07.13 | This is Hemant Waidande dubbing for the Spoken Tutorial project and I hope to see you around next time. |
