Un-Colourisation?

[Kyudos]

I have a photo of a dark green truck. Is there any practical way of making it look like a white truck? (i.e., retaining shading / reflections, but changing the colour). I've seen lots of colour change tutorials, but the all seem to rely on hue changing. I need to 'de-hue'. I've tried selective de-saturation, followed by lightening and merging with a white mask, but it's not satisfactory.

I've tried colour replacement, but that ends up looking like a child has been at the photo with a white crayon.

I guess I don't even know the right tools or terms

Any tips?

Cheers.

[SimonG]

Black & White adjustment layer on screen blend mode should work...?

[Kyudos]

Thanks for the reply Simon, but I just have to say...."errr.....wut?"

Should have mentioned my available tools - GIMP and / or PSP X.

I need to add an adjustment layer in screen blend mode, I think I got that much,
but will that 'un-green' the truck?

My attempts so far have ended up looking either washed out grey or pale green, not the gloss white a white vehicle would really look.

Sorry.... I am no0b ...

[mushmush]

Hello
I would first mask the truck to its own layer ( using lasso tool or pen tool for example then cut & paste).
Duplicate the cut out layer and desaturate that top layer. Set the blending mode of that layer from "normal" to "color".
Now you can work on the layer just beneath that- the 1st cut out of the truck- to brighten as need.
Because the layer above is set to "color", any brightening done to the lower layer will not affect color.

best regards,

[Kyudos]

Thanks mush - but I'm not grasping something - I can't get the damn thing to look white!

Anyone care to have a go?

[edbayani]

Select the truck body, put in another layer, desaturate, apply shadow highlights and adjust with levels. add a hint of yellow on the hilights. With layer mask, select windows and apply light gray to see some color in original layer. With sahrp brush, brush on the lines, the door handle etc. to show image below.

[Xaran]

Try - copy green channel and adjust levels until almost white but can see some shading in truck, Paste over original and add a mask.

Christine

[Kyudos]

Thanks for the relpies. Xaran, I'm sad to say your quick attempt still looks better than I managed in an hour and a half. I'm not sure I actually have the patience for it...

[dataflow]

you only need to do the first line of what edbayani said.

select the body (green parts) copy/paste the selection to a new layer
desaturate and change the level until the body is bright
then change the blend mode to something like "Screen"