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Abstract pattern – purple to red but keep the blue

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Old 10-16-2012, 05:21 PM
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stedders stedders is offline
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Abstract pattern – purple to red but keep the blue

I'm having trouble with this and would be grateful for any tips.

On the screen grab attached – the purple item to become warm red, but the blue items need to maintained.

Any ideas / tips etc?
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File Type: png Screen Shot 2012-10-16 at 23.17.55.png (76.9 KB, 35 views)
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Old 10-16-2012, 05:31 PM
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Re: Abstract pattern – purple to red but keep the

I should have added that the main problem I am having is the most effective way of making a selection of the items
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Old 10-16-2012, 06:48 PM
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philbach philbach is offline
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Re: Abstract pattern – purple to red but keep the

Well one thing you can try is to convert the image to LAB color and work on the A channel which balances Magenta and Green. Blue is in another channel and won't be affected
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File Type: jpg ToRed.jpg (191.8 KB, 13 views)

Last edited by philbach; 10-17-2012 at 06:24 AM.
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Old 10-16-2012, 07:01 PM
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Re: Abstract pattern – purple to red but keep the

This is one way that may help you with selection:
  • Add a temporary Hue and Sat layer and enhance the Blue and consider reducing the Magenta
  • Use Color Range to grab the blue areas adjust fuzziness etc as needed and when you have your mask turn off the temp Hue and Sat layer
  • Now use either another Hue and Sat or any other colour method with the mask you have just created to turn the magenta/pink areas red. You will need to invert the mask and probably also apply some blur to the mask to blend
  • There are still some magenta traces that you may want to blend a little perhaps painting over with brush set to colour or you may be able to produce a more accurate mask than I did
Used this method on the attached which will change after a few seconds
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File Type: gif colorchange.gif (156.0 KB, 15 views)
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Old 10-17-2012, 08:25 AM
kannetth kannetth is offline
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Re: Abstract pattern – purple to red but keep the

Hi, this is my first message, I hope I can help.
For me the solution is (working in RGB):
1- Curves layer, play with blue and red (but also green if you think it's needed). You can see my example below.
2- If the blue is too dark you could duplicate the original image, set the blending to saturation and then mask the red with a large soft brush (I think you don't have to be too precise here, so the effect will be more smooth). Set transparency as you like: 30% is a good start for me, but go to 75-100% if you want something stronger (in my example you'll see 30%).

EDIT:
By "warm red" I assumed something orange-ish.. If the color isn't right just play with the curves to add more blue in the highlights-midtones and you'll have a colder red.
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File Type: jpg example.jpg (85.9 KB, 13 views)

Last edited by kannetth; 10-17-2012 at 08:30 AM.
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Old 10-17-2012, 10:52 AM
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Re: Abstract pattern – purple to red but keep the

Hi stedders,

Here are a couple of methods you may wish to try (using PS CS5):

1. Add a gradient map adjustment layer, normal mode. Build the map based on the resulting colors you want. Tricky, but allows a great deal of control.

2. Add a solid color adjustment layer with the desired 'red', color mode. Using 'blend if' for this layer, adjust the blue channel sliders to bring back the blues from the underlying layer.

Good luck,
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File Type: jpg stedders.jpg (98.7 KB, 13 views)
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