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Boosting Black Boosting Whites

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  #11  
Old 08-15-2009, 08:41 AM
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seattle-light seattle-light is offline
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Re: Boosting Black Boosting Whites

Hey Mart...

If you use the gradient map as an adjustment layer in Normal mode it will give you the black and white you're looking for. If you use another blending mode like soft light it will apply the same black and white "gradientized" information as soft light (which would enhance the overall contrast of the image). Multiply would make it darker and grayer. Etc.

Using it in an adjustment layer will of course not affect the color information in the lower layers when that adjustment layer is turned off -- this allows you to have all of the original unaltered color information below. This allows you to work non-destructively (and that gives you greater flexibility down the line), but of course the file is bound to get bigger (but if it's an image worth working on then it's usually worth the size and a larger file is easier than keeping track of a whole bunch of different versions so you can go back and change something in the color file and then convert it again into grayscale so you can fix something and then add the contrast again). The point of using a adjustment layers is to adjust the appearance of the images without impacting the underlying information. You can always duplicate layers and merge them if you need to (but that can often seriously limit your options going forward).

An example would be if you wanted to use Liquefy to move some information around. But make sure that you label that merged layer (so you'll remember what it is) and save the mesh so that if you need to change something below in the layer stack you can fairly easily duplicate the layers and merge them again and apply that same mesh in Liquefy to get right back to where you were (but now with the underlying changes in place).

Maintain flexibility and reduce having to do the same things over and over (but never being able to get them exactly the same). In the long run, it saves time and frustration while opening up possibilities.
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  #12  
Old 08-15-2009, 01:03 PM
Quantum3 Quantum3 is offline
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Smile Re: Boosting Black Boosting Whites

Quote:
Originally Posted by seattle-light View Post
Hey Mart...

If you use the gradient map as an adjustment layer in Normal mode it will give you the black and white you're looking for. If you use another blending mode like soft light it will apply the same black and white "gradientized" information as soft light (which would enhance the overall contrast of the image). Multiply would make it darker and grayer. Etc.
Hi mate,

I added a gradinet map by using an adjustment layer and left the blending mode in normal. I just see the gray scale gradient map and not the photo. It's supposed I should see a black and white photo, isn't it?

Thanks for your reply,

Mart
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  #13  
Old 08-15-2009, 04:08 PM
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seattle-light seattle-light is offline
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Re: Boosting Black Boosting Whites

Hey Mart...

That's definitely a puzzling one. Are other types of adjustment layers working properly for you?
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  #14  
Old 08-15-2009, 04:27 PM
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amica999 amica999 is offline
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Re: Boosting Black Boosting Whites

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Originally Posted by Quantum3 View Post
Hi mate,

I added a gradinet map by using an adjustment layer and left the blending mode in normal. I just see the gray scale gradient map and not the photo. It's supposed I should see a black and white photo, isn't it?

Thanks for your reply,

Mart
Are you sure you use the Gradient Map and not a gradient Adj-Layer?
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  #15  
Old 08-15-2009, 05:40 PM
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seattle-light seattle-light is offline
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Re: Boosting Black Boosting Whites

I think amica999 is on to something here.

Maybe it's a subtle semantic difference, but it's an important distinction. An Adjustment Layer is different from making an adjustment to a layer.

You need to create a Gradient Map adjustment layer (rather that applying a Gradient Map to an adjustment layer). And I probably wasn't entirely clear, so please accept my apologies if I sent you down a path to confusion..

Try this over your image.
Layer>New Adjustment Layer>Gradient Map (then select the grayscale gradient). Make sure that the blending mode is Normal and that the opacity is set to 100%.

Good luck, and let me know how it works out.
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  #16  
Old 08-15-2009, 07:48 PM
Quantum3 Quantum3 is offline
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Re: Boosting Black Boosting Whites

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Originally Posted by seattle-light View Post
...probably wasn't entirely clear, so please accept my apologies if I sent you down a path to confusion..

Good luck, and let me know how it works out.
Hey no problem... You're very helpful from the beginning. I've never ever seen the gradient map in the adjustment layers menu... It's a new feature of CS4 or CS3 also has it? I'm wondering because I use photoshop since the version 5! lol!!!

Ah, by the way, I found it! =D

Thanks a lot for the enlightening, mate
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  #17  
Old 08-15-2009, 07:50 PM
Quantum3 Quantum3 is offline
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Smile Re: Boosting Black Boosting Whites

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Originally Posted by amica999 View Post
Are you sure you use the Gradient Map and not a gradient Adj-Layer?
Hey Amica, you knocked the right door. I was adding just a gradient haha... Thank you very much for pointing there...

You also been very helpfull!!!

Thank you very much Amica,

Mart
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  #18  
Old 08-16-2009, 03:51 AM
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amica999 amica999 is offline
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Re: Boosting Black Boosting Whites

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Originally Posted by Quantum3 View Post
Hey Amica, you knocked the right door. I was adding just a gradient haha... Thank you very much for pointing there...

You also been very helpfull!!!

Thank you very much Amica,

Mart
no problem, you are welcome. Glad it worked now
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  #19  
Old 08-17-2009, 07:11 AM
_ManWithNoName_ _ManWithNoName_ is offline
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Re: Boosting Black Boosting Whites

Thanks all for the responses.

I've read thru them but not had a chance to go into them in depth yet Just did a quick G-Map on the image in my original link.

I can see if you add multiple GMaps it deepends the blacks and lightens the whites. So I will have a play with this method and the others mentioned.

I also agree with the above. Photography is more than the camera, it's the printing. I think it was Micheal Kenna or Rolfe Horne that shows his techinique. You see the original image, which isn't all that, but after he's done his printing, the image is 200% better.

Not got any images to work on just yet, but may bump this thread again...

Cheers..
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  #20  
Old 08-17-2009, 07:35 AM
HelloPiccadilly HelloPiccadilly is offline
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Re: Boosting Black Boosting Whites

some similar stuff by http://www.michelrajkovic.fr
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