Selecting layers from a flattened image

[strawb]

Guys

I'm new here, so hello! I would like to know what the name of the tool/technique is to highlight the green area of the above image. I presume I would use some sort of channel filter or something. Don't worry about the full details of how to do it, just the name of the tools/technique.

My aim is to be able to put the image on a different colour background. I am using CS5.

Strawb.

[Vafann]

Magic wand maybe?

[strawb]

Ok thanks Vafann,

I just thought there would be a way to do it without having to tweak thresholds and individually select the different sections.

I will get the wand out.

Cheers John.

[Vafann]

Ok thanks Vafann,

I just thought there would be a way to do it without having to tweak thresholds and individually select the different sections.

I will get the wand out.

Cheers John.

Hi again John . Maybe the wand wasen´t the best choice, I tired and this was the best I could get out of it, I suppose it get more detailed if it was multiplied some more, but I duplicated the layer 3 times, and multiplied them, but still this wasen´t very good. I really don´t know what to do instead, I hope someone else knows better.

[Vafann]

Oh and it also got pixelized but that was because I enlarged it too much lol.

[Paul]

You sound knowledgeable already John?

[SeniorS]

For that kinda image can use same methods as for hair extraction.



1. Make background layer dublicate.
2. With Curves set white point to outside tree and make lot darker tree (adjust that in RGB chanell still in Curves panel).
3. Add Layer Adjustment Layers Black & White and merge it with that dublicated/contrasted layer.
4. Make that greyish layer copy and set blending mode to Multiply.
5. CTRL+click on RGB in Channels panel.
6. Invert selection. Or fill with background you want.
7. If you inverted selection then make original background copy and use selection as mask (or just press CTRL+J).


P.S. Vafann, light grey just isn't best option for background for this image.

[Vafann]

For that kinda image can use same methods as for hair extraction.

Attachment 8737Attachment 8738

1. Make background layer dublicate.
2. With Curves set white point to outside tree and make lot darker tree (adjust that in RGB chanell still in Curves panel).
3. Add Layer Adjustment Layers Black & White and merge it with that dublicated/contrasted layer.
4. Make that greyish layer copy and set blending mode to Multiply.
5. CTRL+click on RGB in Channels panel.
6. Invert selection. Or fill with background you want.
7. If you inverted selection then make original background copy and use selection as mask (or just press CTRL+J).


P.S. Vafann, light grey just isn't best option for background for this image.

Lol! I know Senior S! It was white, but it turned grey when I was multiplying it, it was a lot harder than I thought.

[SeniorS]

That's happened because background wasn't white. If you talking about hair extraction tutorial where cliping mask used then there was white background (little cheating ).
So before multiply you should make background total white (or very close to white) on dublicated layer of course.
And try not overlight main image as the same time. Tricky sometimes but for this one Curves is best option.

[Vafann]

That's happened because background wasn't white. If you talking about hair extraction tutorial where cliping mask used then there was white background (little cheating ).
So before multiply you should make background total white (or very close to white) on dublicated layer of course.
And try not overlight main image as the same time. Tricky sometimes but for this one Curves is best option.

No, I put it on a new white background layer, I don´t know why it turned grey lol.