Help needed with effects in Photoshop – please help

"Neil Hindry" wrote in message

I wonder if you can help me.

I used to do a bit of B&W film photography and would like to try and replicate some of the things I used to do in B&W photography digitally.
I used to add a red filter to the front of my camera’s lens and it would increase the colour of blue’s & greens. For example it would make the sky appear dark and dramatic.

Can someone please tell me how I can duplicate the effect of a red filter to a B&W picture in Photoshop 7?
Please keep your instructions simple as I have not used Photoshop for long.

Any help or information given will be gratefully appreciated.
I hope you can help.

Thanks!

You might want to have a look at NIK PhotoShop plug in "Color Efex Pro" They have a free trial you can download

http://www.nikmultimedia.com/index/usa/entry.php

Otherwise, without that plug in you can achieve the same effect by going to you channel mixer and turning the reds up and the blues and greens down, (assuming you are starting with a color image).

If you are starting with a black & white I fear this may be tougher to do. You would have to apply levels and contrast adjustments selectively. There is no way for Photoshop to know what used to be green or blue in a B&W image..

Applying effects selectively is really easy to do.. you might want to check out lesson in my tutorial section

www.imagequest.netfirms.com

On Sun, 3 Jul 2005 17:18:06 +0100, "Neil Hindry" wrote:

I wonder if you can help me.

I used to do a bit of B&W film photography and would like to try and replicate some of the things I used to do in B&W photography digitally.
I used to add a red filter to the front of my camera’s lens and it would increase the colour of blue’s & greens. For example it would make the sky appear dark and dramatic.

Can someone please tell me how I can duplicate the effect of a red filter to a B&W picture in Photoshop 7?
Please keep your instructions simple as I have not used Photoshop for long.
Any help or information given will be gratefully appreciated.
I hope you can help.

Thanks!

Is this an actual B&W or a colour image which you’re turning into B&W?

—

Hecate – The Real One

Fashion: Buying things you don’t need, with money
you don’t have, to impress people you don’t like…

The picture is an actual B&W picture & not a colour picture converted to B&W.

Why does this make a difference? If so how? Please excuse my ignorance I am a beginner in digital photography.

Thanks!

—

———————————————————— ————- FIGHT BACK AGAINST SPAM!
Download Spam Inspector, the Award Winning Anti-Spam Filter http://mail.giantcompany.com

"Hecate" wrote in message

On Sun, 3 Jul 2005 17:18:06 +0100, "Neil Hindry" wrote:

I wonder if you can help me.

I used to do a bit of B&W film photography and would like to try and replicate some of the things I used to do in B&W photography digitally.
I used to add a red filter to the front of my camera’s lens and it would increase the colour of blue’s & greens. For example it would make the sky appear dark and dramatic.

Can someone please tell me how I can duplicate the effect of a red filter to
a B&W picture in Photoshop 7?
Please keep your instructions simple as I have not used Photoshop for long.

Any help or information given will be gratefully appreciated.
I hope you can help.

Thanks!

Is this an actual B&W or a colour image which you’re turning into B&W?
—

Hecate – The Real One

Fashion: Buying things you don’t need, with money
you don’t have, to impress people you don’t like…

In article <42c8103b$0$10479$>,
"Neil Hindry" wrote:

I wonder if you can help me.

I used to do a bit of B&W film photography and would like to try and replicate some of the things I used to do in B&W photography digitally.
I used to add a red filter to the front of my camera’s lens and it would increase the colour of blue’s & greens. For example it would make the sky appear dark and dramatic.

Can someone please tell me how I can duplicate the effect of a red filter to a B&W picture in Photoshop 7?

If you are already starting with an image that is B&W to begin with, you can’t.

You see, those filters work because they start with a color image. A red filter makes a blue sky darker because it filters blue light. But if the image is already B&W, Photoshop has no way to know what is the sky and what is not the sky; all Photoshop sees is a bunch of gray, and has no way to tell what gray used to be blue and what gray used to be red and so on.

If you start with a *color* image, you can simulate the effects of these filters. If you start with a *black and white* image, you can’t. All you can do is try to duplicate the effect manually–select the sky and make it darker, and so on.

—
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html

I think what needs to be considered here are our collective abilities to communicate, both telling and listening. While Neil said what he would like to do is duplicate the effect of a red filter, he also said that what he would like to achieve is the sky appearing dark and dramatic. More to the point, when he earlier said he would like to try to replicate some things, I think most people would agree that what he wants is the dramatic effect rather than the using such filters. The reason for appreciating this might be the case, and the really really good news for him, is that there is a great deal he can do with PS to achieve the same effects. Check out the on-line tutorials, Neil. And welcome to Wonderland.

"Tacit" wrote in message

In article <42c8103b$0$10479$>,
"Neil Hindry" wrote:

I wonder if you can help me.

I used to do a bit of B&W film photography and would like to try and replicate some of the things I used to do in B&W photography digitally.
I used to add a red filter to the front of my camera’s lens and it would increase the colour of blue’s & greens. For example it would make the sky appear dark and dramatic.

Can someone please tell me how I can duplicate the effect of a red filter to
a B&W picture in Photoshop 7?

If you are already starting with an image that is B&W to begin with, you can’t.

You see, those filters work because they start with a color image. A red filter makes a blue sky darker because it filters blue light. But if the image is already B&W, Photoshop has no way to know what is the sky and what is not the sky; all Photoshop sees is a bunch of gray, and has no way to tell what gray used to be blue and what gray used to be red and so on.

If you start with a *color* image, you can simulate the effects of these filters. If you start with a *black and white* image, you can’t. All you can do is try to duplicate the effect manually–select the sky and make it darker, and so on.

—
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html

On Mon, 4 Jul 2005 13:23:34 +0100, "Neil Hindry" wrote:

The picture is an actual B&W picture & not a colour picture converted to B&W.

Why does this make a difference? If so how? Please excuse my ignorance I am a beginner in digital photography.

Thanks!

I think you’ll, find Tacit, as always, has explained clearly why.

—

Hecate – The Real One

Fashion: Buying things you don’t need, with money
you don’t have, to impress people you don’t like…