Colour change…

H
Posted By
Hamleet
Jan 12, 2004
Views
176
Replies
3
Status
Closed
Hello, i’m new to Photoshop and i was wondering how can i change th colour of a picture with a car.
The car is red and i want to change it in blue. I try with the Lass tool (select only the car from that photo) and then change the colou and succeded BUT – there is another way more…Professional to do it?

Thanx and scuze my bad english

Hamlee
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S
supchaka
Jan 12, 2004
Hit Q to enter quickmask mode. Use the brush tool to "paint" the car. I will be reddish, but dont worry about that, you’re just creating mask. You can be very clean with your mask this way. After you’re don with that, hit Q again to exit Quickmask.

Then go layer- new adjustment layer- and do color balance, o hue/saturation or whatever you want to play with at that point. Tha should at least get you started

supchak
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H
Hamleet
Jan 12, 2004
Thank you, i’ll try right now :

Hamlee
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MR
Mike Russell
Jan 12, 2004
Hamleet wrote:
Hello, i’m new to Photoshop and i was wondering how can i change the colour of a picture with a car.
The car is red and i want to change it in blue. I try with the Lasso tool (select only the car from that photo) and then change the colour and succeded BUT – there is another way more…Professional to do it?
Thanx and scuze my bad english !

Here’s a really fun way to change the color of a car that will take less than a minute:

1) convert the image to Lab mode
2) swap the ends of the a channel curve (move the bottom left corner to the top left, and the top right corner to the bottom right). Voila! Instant green car.
3) swap the ends of the b channel curve. Instant blue car! Ain’t color spaces wonderful?

Using the curvemeister plugin you can do this without leaving RGB mode. Check out the demo at www.curvemeister.com.

More than likely, something in the background will change in a way you don’t like, though you may luck out for images like this if your background does not contain any important colors, and/or you only need to invert one of the two curves.

To avoid messing up the background, dup the layer first, do the Lab move, copy the a channel and use it as your layer mask. Adjust the layer mask with levels or curves to select precisely the red areas of the car. Again, although this is relatively easy to do in Photoshop, Curvemeister will let you copy the a channel without having to convert to Lab mode.

The nice thing about all this is you don’t have to spend your time drawing the mask in great detail, although you will more than likely have to clean up the mask from the "a" channel a bit to keep red objects in the background from changing color.



Mike Russell
www.curvemeister.com
www.geigy.2y.net

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