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changing red area to silver

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changing red area to silver Florin Andrei 24 Jul 02:29
  changing red area to silver Joao S. O. Bueno 24 Jul 02:35
   changing red area to silver Florin Andrei 24 Jul 21:07
Florin Andrei
2009-07-24 02:29:53 UTC (over 15 years ago)

changing red area to silver

(I'm a newbie.)

I'm trying to modify this image:

http://imgur.com/5kHey

It's a 2009 Kawasaki ZX-10R. The orange-red areas need to become silver, approximately the color of aluminum. Look at the exhaust pipe - that's pretty close to what I envision.

I tried converting it to back/white, but the red area is still too dark. I then tried to play with brightness and contrast, but it looks ugly.

Is there a way to select the red parts just based on the fact that they are red? Then somehow get rid of chroma and brighten up just the selected parts? (while preserving shadows, etc.)

The goal here is to imagine how the bike will look like once it's painted silver over the red parts.

I'm not trying to get anyone do it for me, I'm trying to learn how to do it myself. Any help is appreciated. Thanks.

Joao S. O. Bueno
2009-07-24 02:35:55 UTC (over 15 years ago)

changing red area to silver

On Thursday 23 July 2009, Florin Andrei wrote:

(I'm a newbie.)

I'm trying to modify this image:

http://imgur.com/5kHey

It's a 2009 Kawasaki ZX-10R. The orange-red areas need to become silver, approximately the color of aluminum. Look at the exhaust pipe - that's pretty close to what I envision.

I tried converting it to back/white, but the red area is still too dark. I then tried to play with brightness and contrast, but it looks ugly.

Is there a way to select the red parts just based on the fact that they are red? Then somehow get rid of chroma and brighten up just the selected parts? (while preserving shadows, etc.)

The goal here is to imagine how the bike will look like once it's painted silver over the red parts.

I'm not trying to get anyone do it for me, I'm trying to learn how to do it myself. Any help is appreciated. Thanks.

* use teh select by color tool (just beside the "magic wand" and pick "hue" as the key on the tool options dialog.
* play with select/deselect changing the fuzzyness factor unitll you are colose to the orange/red parts boundaries * then do select -> grow selection -> and put soemthing like 5% of image width * select -> feather selection -> the same 5% of image width now, turn of the visualisation of the selection, while keeping it active : * togle 'view-> Selection boundary
* 'colors->hue & saturation, drop saturation to -100 * colors -> curves: create a "s" shapped curve until you get the desired looks. then ok.

js
->

Florin Andrei
2009-07-24 21:07:24 UTC (over 15 years ago)

changing red area to silver

Joao S. O. Bueno wrote:

* use teh select by color tool (just beside the "magic wand" and pick "hue" as the key on the tool options dialog.

Thanks for the howto, it really helped. This is the result:

http://imgur.com/gw38F

It's not perfect, but it's fine for the purpose of envisioning what the bike will look like after painting.

- I used Select by Color. - I toggled Feather Edges (without it the selection was bad; I removed this fuzziness two steps below).
- I played with the Threshold - around 10.0 or 11.0 was fine. - Went to Select / Sharpen to remove fuzziness. - Used Free Select to correct some missing corners - lots of manual work, still not perfect, as you can see, but good enough. - Colors / Hue-Saturation and desaturated it. - Colors / Curves and pulled the curve up from one point in the middle.

I guess I shouldn't be so scared of all those options, the program is quite logical after all. :-)