Sony Digital Camera Forums

Digital Photography Technique => Digital Darkroom => Topic started by: 964rh on February 09, 2009, 11:19:30 PM

Title: What do I need to do?
Post by: 964rh on February 09, 2009, 11:19:30 PM

Looking to play around with a pic of my car and wondered if someone can point me in the right direction.

What I'd like to do is turn the background to b&W and leave the red of the car, possibly getting the red a bit deeper in colour as well.

Completely new to CS3 but would like to learn rather than get someone to do it for me professionally.

This is the pic

Any pointers would be greatly appreciated


Title: Re: What do I need to do?
Post by: Fixxxer on February 09, 2009, 11:25:56 PM
The technique is known as colourising (or colorizing if you're American). Rather than explain it in my own words, I think it would be much more constructive (though far lazier) to give you the links to some photoshop tutorials.

Glad to hear you have CS3. Lightroom 1/2 (depending on your budget) is an awesome investment if you like photomanipulation, but it can cost the price of a lens or flashgun...

This is a particularly excellent tutorial, probably in too much depth for what you need to do but it's easy enough to stop when you're satisfied or skip sections. Worth bookmarking.

EDIT: By the way, very nice picture - did you use panning at all?

a much simpler tutorial...
Title: Re: What do I need to do?
Post by: Bigbreakfast on February 09, 2009, 11:27:47 PM
Hi Rob
This is the non technical version!
Make a copy of the image and paste it on top of itself (right click in layers and choose duplicate layer)
Think of layers like panes of glass on top of each other and the viewer looks down.
click the lower layer and change it to b&w
On the top layer select the car using the select tools and then inverse the selection (select > inverse) this means everything except the car is chosen. Ctrl X will remove everything except the car.
Now you will see a red car and a black and white background.
Increase the saturation until the car is the colour wanted (make sure you are on the right layer when changing the saturation)
Title: Re: What do I need to do?
Post by: tpe on February 09, 2009, 11:29:28 PM
Duplicate the layer and desaturate. Use the channels and select all of just the red layer and hit control C.

select all the channels so as everything is visable again.

Go back to layers, make a new layer and hit ctrl v.

Set the layer type to exclusion.

hit ctrl i to inver the colour.

Select everything and copy it and then paste it to a new layer.

Set the layer type to colour

Hide the two layers below it

You should have all the red showing up on a mostly black and white background.

Then you can copy the original to another layer, desaturate it and delete any bit you want so as the red car shows through without having to worry about how accurately you do it. This should work because the picture was mainly red or green, so easy to extract without masking. if you had another picture with lots of different colours it would not work so well, or if the picture was a different colour you may have to chose a different channel.

There are loads of other ways to do it but this should get you started without having to mess around with masks.

Title: Re: What do I need to do?
Post by: tpe on February 09, 2009, 11:31:15 PM
Hehe, everyone is so fast here, two methods in the time it took to write 10 gramatically horrid lines :).

Title: Re: What do I need to do?
Post by: 964rh on February 10, 2009, 10:18:04 AM
Thanks for the links and tips all, I've have a go tonight.

The picture wasn't taken by me, a pro photographer who covered the trackday took the snap.