Change object colour?

farss wrote on 10/4/2007, 2:34 PM
Here's what I have:

Still of the object, it's a simple shape so masking it is trivial. Surface finish isn't very reflective and it's all one colour. It's a rotomoulded rainwater tank so colour is very consistent. Only possible issue is as it's outdoors the top section is blown out to white.

I have sample swatches of all the colours this thing can be made in.

I'd like to produce an animation showing the tank in the original photo going through all the colours it could be made in.

Where I've got to is to convert the photo to B&W then add generated colour, this works very simply as I can use the eyedropper in the gen media to sample the colour swatches. Once that's done I'll simply mask the recoloured tank back into the original photo.

Only issue I seem to be hitting is around the highlighted area, where the object colour gets blown out to white doesn't look quite right. Probably I can fudge it good enough for this exercise but interested to hear if anyones got any ideas.

Bob.

Comments

jrazz wrote on 10/4/2007, 3:02 PM
Bob,

Have you tried cutting it out and placing the object on a seperate layer and just adjusting/shifting the hue while allowing for it to be "colorized"? That tends to play nice with shading, etc and it looks more realistic than "painting" over the object.

I have to go and do some contract filming tonight but if you get stuck send me the file and the colors and maybe I will have some time to take a look at it this weekend.

j razz
Grazie wrote on 10/4/2007, 3:04 PM
Secondary Colour Corrector? No? G
farss wrote on 10/4/2007, 3:12 PM
I'll give that method a go but I originally dismissed that idea as a) I thought I'd also shift the blown out section and b) there's quite a range of colours to cycle through, just sampling the swatches is a piece of cake.

I can use my method and recolour it back to it's original colour with perfect results, it's seems to be some colours such as reds where things look a little awry, just in the transition to 'blown out'.

I'll have another stab at it tonight, gotta go do real work too :)

PS: Maybe I should try this in V8 with 32bit linear.

Bob.
richard-courtney wrote on 10/4/2007, 6:57 PM
I like the jrazz solution.
Greyscale the entire frame. Cut out the hot spot and darken it.
Then colorize the corrected grey frame.