Monthly Archive for August, 2006

Black and White from Colour Images - Part 4 - Digital Photography Tip of the Week

Over the past few weeks, I have discussed different methods to create black and white photographs from your colour images. I covered the three main conversion techniques, convert to grayscale, desaturate you image, and using the channel mixer. Of course, there are still even more ways to convert you image to a black and white photo.

Both methods outlined here today involves using features of Adobe Photoshop that are not supported by Adobe Photoshop Elements 4.0.

One method that I use quite frequently involves converting your image to the LAB colour space.

  1. Open the image for editing
  2. Convert the image to LAB color space: Image => Mode => Lab Color
  3. Select the Lightness channel in the Photoshop Channels Palette
  4. Convert the image to grayscale using: Image => Mode => Grayscale
  5. CTRL-Click (CMD-Click on Macs) on the Gray channel in the Channels Palette
  6. Choose Select => Inversere from the menu
  7. Convert to RGB using Image => Mode => RGB Color
  8. Create a Solid Adjustment Layer: Layer => New Fill Layer => Solid Color
  9. Pick a colour (darker, richer tends to work better)
  10. Change the layer mode to overlay and adjust opacity as needed

This method, while seemingly more complicated, is a very quick process. The addition of the colour layer provides a little bit of tinting to the photograph as well. You can use blues to simulate a cold feeling in your image, or a yellow or orange to warm the tones. Brown (again, orange) can be used to create a sepia tone to your image.

Another method I use involves taking something from the print industry; duotones. The first process (and the other processes I have gone through) apply toning equally to the who image. Creating a duotone image is similar to the traditional wet darkroom technique of split-toning. To create a duotone image:

  1. First create your black and white image with whatever process you like
  2. Convert to Grayscale: Image => Mode => Grayscale
  3. Convert to Duotone: Image => Mode => Duotone
  4. Select a color to tone the image with by clicking one of the colored boxed that are part of the duotone window
  5. Adjust the intensity of the duotone by adjusting the curve for the colour you have choosing
  6. When you are happy with the tone of the image, press ok.
  7. Convert your image back to RGB for saving and printing.

Both methods outlined here today will help add depth to an image, and can be used to help control the emotion of the image.

When printing black and white photographs, either at home or at a mini-lab, know what color you image is supposed to be. If you have not applied any toning to the image, the final print should be very neutral. Many lab printers have trouble printing black and white images. I have had prints come back that are noticeably green or even purple. If you are not happy with the images you get back from your lab, have the lab reprint them for you, and be sure to explain what you are unhappy with the photo.

I hope this ongoing series of black and white conversion techniques has been helpful to you. Great black and white prints are not too difficult to achieve, but they are worth the extra time you put into them.

Until next time, happy shooting.

The digital photography tip of the week is written by the PCIN Assistant Editor, Chris Empey. Chris is a long time photographer and is currently the President of the Niagara Falls Camera Club. You can see more of his photography at his Photo of the Day website. If you have a tip to send Chris, or a question about digital photography he can address in the newsletter, send it to chris@pcin.net.

AOL 9.0 Slapped with ‘Badware’ Label

From eWeek:

The high-powered StopBadware.org coalition has slapped a “badware” label on the free version of the AOL 9.0 software program.

The group, which is funded by Google, Lenovo Group and Sun Microsystems, accused AOL of installing additional software without telling the user; adding components to the browser and taskbar without disclosure; automatically updating software without user consent; and making the AOL 9.0 software difficult to fully uninstall.

Google wins eBay’s non-U.S. ads and e-commerce tie

From Reuters:

Google Inc will supply eBay Inc with Web search advertising outside the United States, and the two will join forces on “click-to-call” ads that link online shoppers to customer service operators, the companies said on Monday.

EBay said that for international online text advertising it had agreed to rely exclusively on Google instead of existing partner Yahoo Inc, which in May struck a parallel deal to handle all of eBay’s U.S. ads.

AOL dips into digital movie downloads

From Vnunet:

AOL has announced an agreement with a number of major film studios to offer movie downloads through its AOL Video portal.

The partnership with 20th Century Fox, Sony Pictures, Universal Pictures and Warner Bros will allow visitors to AOL Video to download full-length movies from the site.

Popular films from recent DVD releases to a large selection of archive movies will be available for download at prices ranging from $9.99 to $19.99 per movie.

Once downloaded, movies can be viewed offline as well as on other PCs and compatible portable devices.

The danger of “free”

From SecurityFocus:

Searching for free stuff on the Internet? Beware what you find.

That’s the message form Web safety firm SiteAdvisor. Building on a Wall Street Journal analysis of the 20 million search queries leaked by America Online that found “free” to be the most popular search term, SiteAdvisor warned that the results produced by such searches frequently lead to malicious Web sites.

Instantly recover your precious data with Search and Recover 4

iolo_sr4_box.gif

I received this information from Iolo the other day regarding their Search and Recover 4 software:

Have you ever accidentally deleted a treasured photo, erased an important document, or deleted an email message you wish you could get back?

Accidentally deleting photos, files, songs, e-mail, or videos can leave you feeling angry and helpless. With Search and Recover you never have to feel that way again. It rescues critical work and cherished memories you thought were gone forever.

Search and Recover(tm) 4 by iolo technologies recovers deleted files, photos, movies, e-mail, and more, from any drive, disc, camera, music player, or memory card. Proprietary StrongScan(tm) and SmartScan(tm) technologies allow you to recover information after the worst PC accidents and disasters – even years after the data was lost.

I haven’t tried this software myself, but I wanted to pass the information along. You can visit the Iolo site to learn more.

PhotoRec Software for recovery of digital photos

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I came across this link yesterday pointing to a free, open source software utility used for recovering photos from digital media. There is no install needed, just run the software from a directory. It is a DOS based program but still seems very easy to use. Photorec does not write anything to your digital media which will preserve the integrity of your media in case you need to try additional recovery tools. I have not tried it so I cannot say how well it works, but for the price, it can’t be that bad!

N-Blox (Tetris) and more from Neave Games

When I was growing up I was a huge fan of Tetris. In fact, everyone in my family was. I had the original Nintendo, and we’d fight over who would get to play it. My Mom would even get into it. There are lots of clones around and web-based Flash versions. A very good one is N-Blox.

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The same site also has several other classic arcade games such as Frogger, Space Invaders, and Asteroids. Visit Neave Games to see and play them all.

Object Desktop 2007

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Quite some time ago Chris reviewed Stardock’s Object Desktop. It was an impressive product. The latest version has been released:

Object Desktop 2007 has just been released and it has a ton of great new features such as:

* WindowBlinds 5
* DesktopX 3.2
* WindowFX 3
* RightClick 1.2
* Keyboard LaunchPad 1.5

And the all new Object Desktop Command Center which brings all the pieces together.

You can learn more about it at ObjectDesktop.net

Black and White from Colour Images - Part 3 - Digital Photography Tip of the Week

Last week I continued my discussion of black and white digital photography and the topics of using grayscale and saturation to convert you colour photographs to black and white. This week I discuss using the channel mixer in order to create pleasing and dynamic monochrome photographs.

Channel mixer is available in the full version of Adobe Photoshop CS2, and a similiar tool is available in Microsoft Digital Image Suite. Adobe Photoshop Elements 4 does not offer such a tool, though I am sure there are third party plugins that will perform the same functions.

A digital photograph consists of three colour channels, red, green and blue. Each of those channels is a separate, monochrome image. Displaying each channel individually will show this (and also presents another method of converting to black and white, using only one colour channel). Using the channel mixer though, we can control just how much of each colour channel we use when creating our black and white images.

To open channel mixer in Adobe Photoshop CS2, click on Image => Adjust => Channel Mixer. Whenever possible, using adjustment layers is the best way to make corrections to your photograph as they can be re-edited later on. To make an adjustment layer for channel mixer, click on Layer => New Adjustment Layer => Channel Mixer. The dialog box you will see next has 4 sliders, one for each colour channel and one for constant. The next step after opening channel mixer is to click on the monochrome check box at the bottom of the dialog box.

You can now slide each of the sliders back and forth to increase the intensity of each channel. Results are best when the total of all three channels equal 100, though sometimes a little over or a little under will work as well. The constant slider is used to lighten or darken the whole image by a constant amount across each colour channel.


Original Image


Converted to Grayscale


Desaturated


Channel Mixer


Settings used for above Channel Mixer Image

As you can see by the examples, simple black and white conversions often lack punch and drama that black and white photography has been known for. Controlling each individual colour channel during the colour to black and white conversion allows you to make more dramatic black and white photographs from your colour images.

Next week, I will conclude my series on black and white photography by touching on a few other, less seldom used methods of converting to black and white.

The digital photography tip of the week is written by the PCIN Assistant Editor, Chris Empey. Chris is a long time photographer and is currently the President of the Niagara Falls Camera Club. You can see more of his photography at his Photo of the Day website. If you have a tip to send Chris, or a question about digital photography he can address in the newsletter, send it to chris@pcin.net.