Changing a pic to B&W

Discussion in 'Graphics Programs and Photo Gallery' started by orion, Jan 3, 2004.

  1. orion

    orion TPF Noob!

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    Here's the thing. Usually I prefer to take pictures in color on my 717 because that way I have the option of going B&W or staying with color. In PS7 or 8, I used to set the saturation down to the lowest possible to get B&W on my pictures. Unfortunately, this produces unwanted effects, such as noise. Then I tried the convert image to grayscale way. This provided better results, but not really what I expected. Is there any other way to do this or must I simply start taking some shots with the B&W function on my camera? Thanks in advance!
     
  2. Dew

    Dew TPF Noob!

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    what i always do is use a gradient map for my b&w

    image>adjustments>gradient map> select b&w


    some samples i did, you may want to do your own testing, these have been reduced in size and some quality to sacrifice loading time


    in color

    [​IMG]


    same photo in b&w with gradient map

    [​IMG]


    there is also an interesting post here:
    http://www.thephotoforum.com/forum/viewtopic.php?t=2441
     
  3. voodoocat

    voodoocat ))<>(( Supporting Member

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    I second the gradient map option. I like the contrast of it better than desaturating or converting to grayscale.
     
  4. vonnagy

    vonnagy have kiwi, will travel...

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    cool tips. unfortunately, i'll have upgrade to pshop 6 or 7 to get the gradient map thingy.

    a photoshop guru recently told to lower the blue spectrum of a b&w photo to get rid of noise. I think she deleted the blue channel for this effect or something. I haven't had a play yet, but I was wondering if any of you heard of this?
     
  5. seanarmenta

    seanarmenta TPF Noob!

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    you should never let your camera do the conversion to bw. you want to do it in a program such as photoshop. and you certainly don't want to simply convert to greyscale or do a desaturate. the reason being is lack of control over the tonalities.

    there are dozens of ways to achieve the same result in photoshop, for different things, not only bw conversion. however, i like to choose the process which gives the greatest control.

    create an adjustment layer over your image with channel mixer. that's layer>adjustment layer>channel mixer

    when the channel mixer window pops up, check on the monochrome box along the bottom. this will convert your image to monochrome with the red value at 100%. now adjust the red, green, and blue sliders to achieve the tones you want. make sure that the percentages all equal out to 100. so you could have red at 33, green at 43, and blue at 30. but they all add up to 100. as you will see, you have great control over the tones, since using each slider individually will be like using a red filter or a blue filter on your lens when shooting bw film. see what happens when you place the green at 100, or just the blue at 100.

    here is the original image:
    [​IMG]


    100% red
    [​IMG]

    100% green
    [​IMG]

    100% blue
    [​IMG]

    and the final product, red 60, green 20, blue 20:
    [​IMG]

    there is a more complex way to get the most control out of the bw conversion, but this way is the best balance between simplicity and control.

    sean
     
  6. vonnagy

    vonnagy have kiwi, will travel...

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    sean thats amazing!
    thanks for that, I didn't know what i was missing all this time! Not only that, but that was really easy to follow :)

    whenever you feel like posting more, i'm all ears :)
     
  7. seanarmenta

    seanarmenta TPF Noob!

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    thanks mark. funny, after using photoshop for 3 years, only now does it seem more straightforward and less complex to me. and i only use a good 1/4 of the program! LOL god knows how long it'll take before i understand the other 3/4.

    i'll post the more complex way in a separate post :) it's rather long in a step by step format, so i'll have to get my fingers ready LOL

    sean
     
  8. terri

    terri Administrator Staff Member Supporting Member

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    Sean, that is truly an amazing transition. Out of simple ignorance, the few times I've had reason to, I've only converted to grayscale and tried to compensate for the admittedly weak results by playing around with contrast and curves. But this is just outstanding. Like you I use this software in a very limited way, but that's no reason not to become expert within my limits. If that makes sense. :scratch: hee hee
     
  9. voodoocat

    voodoocat ))<>(( Supporting Member

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    Excellent post! Thanks for sharing
     

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