David wrote:
"Rob" wrote in message
David wrote:
How can I make everything in a picture look either red, green, or blue? Would this be the same as using a red, green, or blue filter on a digital camera?
Thanks,
David
Not sure which version of PS you have
Image > adjustments > Photofilter which is like adding a filter on over the lens.
More impact Firstly desaturating the image which is just above camera filters.
This I don’t think is what you want as its not dramatic enough.
Oh I forgot the version- CS2.
I tried the photofilter but still saw some of the other colors through it- is there a way to make everything a shade of red, green, or blue (perhaps different than camera filters) ?
Dave
A filter does exactly wnat the name suggests. It filters out certain coloured light frequencies, only allowing the described colours to pass through.
If you want the effect you’ve described, you need to convert to black and white first.
If you want your end result to be truly accurate, this BW conversion stage is all important. Perhaps the most importnat stage in the process. You can use the desaturate methods as described by others, but it won’t give you the effect of certain frequencies being filtered out. For that, you need a different BW conversion method.
The best way to convert to black and white for your job would be to use the channel mixer.
Open the channel mixer by going to Image>Adjustments>Channel Mixer, then select the appropriate channel for the colour filter you’re simulating. So for a red filter, choose the red channel.
For a green filter choose the green channel. If you’re simulating a purple filter, you can choose either the red or blue channel, depending on which side of the spectrum your finter is biased towards. You get the general idea.
Once you’ve selected the channel, click on the monochrome tick-box at the bottom and then click on Okay.
This creates a black and white image, while filtering out all the appropriate light frequencies, according to the filter you’re simulating.
Now go to Image>Adjustments>Photo Filter, and select the colour-picker option instead of the drop-down menu. In your colour-picker, choose a colour that matches the filter you’re simulating.
Now play with the density slider, and experiment by switching on and off the preserve-luminosity option until you’re happy with what you’ve got.
