volume 2 no. 2
picturelineNews

 Photoshop Tip - Black and White Custom Conversion
 

Have you faced those lack luster black and white conversions that the photoshop default provides?
Well here is a photoshop tip that will add zip.


PHOTOSHOP B&W CUSTOM CONVERSION

Photoshop 6.0 or greater required


It is very important to provide a backup path as you work. You will be leaving a trail in Photoshop (PS) that you can go back to in the event of an error or change of mind, without having to completely start over from scratch. Please follow each step.

For images captured in RAW format; select one
   A) Use your camera specific software.
   B) Use PS 7.0 with optional Adobe download for RAW conversion.
   C) Use PS 8.0 (CS)
Make any adjustments or corrections you would like in that application and then “SAVE AS” 1) using a descriptive title for a name (ei: GoldTree represented here as xxx), 2) underscore CamImg (stands for camera image), 3) dot PSD (Photoshop document / to be certain of retaining PS layers). Should look like this “xxx_CamImg.psd”.
Now the original RAW data will remain intact without further modification.

For camera captured images in jpeg or tiff modes, open PS then File>Open and click on the image file to be opened. Then immediately “SAVE AS” 1) using a descriptive title for a name (ei: GoldTree represented here as xxx), 2) underscore CamImg (stands for camera image), 3) dot PSD (Photoshop document / to be certain of retaining PS layers). Should look like this “xxx_CamImg.psd”.

For images captured from a film or flatbed scanner; select one
   A) They are directed to the desktop, then use PS>File> Open.
   B) They are directed right into Photoshop>New Document.
Immediately “SAVE AS” 1) using a descriptive title for a name (ei: GoldTree represented here as xxx), 2) underscore ScanImg (stands for scanner image), 3) dot PSD (Photoshop document / to retain PS layers). Should look like this “xxx_ScanImg.psd”.
Now the original Scanner data will remain intact without further modification.

Once the camera image (CamImg) or scanner image (ScanImg) is open in PS use the necessary tools to only spot and cleanup the image file. Upon completion of that function immediately “SAVE AS” xxx_Spot.psd. You will have your backup Img file and your Spot file.

You will now use the Spot file and make any necessary gross or overall color correction. Do not go into small detail here. “SAVE AS” xxx_ClrPix.psd (color picture).

Using the ClrPix file immediately “SAVE AS” xxx_BW.psd. Now go to Layer>New Adjustment Layer>Channel Mixer>click. Click on the Green Channel at the top of the dialog box. The green channel is used because it is the one with the most information. Click or check the monochrome box at the lower left of the dialog box. Using the adjustment sliders set Red=20%, Green=70%, Blue=10%. These are the approximate values PS would select if the image was desaturated or changed in grayscale. These settings are rarely the best, so adjust the sliders to optimize your image, just as if you had added a filter on the camera.

Once you have achieved the optimized best look, click on the background layer in the layers pallet. Click on Add New Layer at the bottom of the layers pallet (the icon with a half black and half white circle). Select a Hue / Saturation Layer. In the hue/saturation dialog box use the H/S slider to separate the image tones for the best look. Use the Lightness slider to adjust the strength of the filter applied. In the layers pallet you will now have, starting from the bottom, background layer, hue/saturation layer, and channel mixer layer. You may now click on the channel mixer icon (three circles) and readjust if necessary. Click “SAVE” and you will now have a perfect Black & White image, which is still fully customizable, with your color image underlying it. You may click on the eye icons in the layers pallet to turn on and off your adjustments to see your adjustment results and the base image.

Now click “SAVE AS” add “xxx_810.psd” (or what ever size you are going to make or print / 46, 57, 1114). Now go to Image>Image Size> set your Height (10), Width (8), Pixel count per inch (300 for prints) and click OK. This will physically adjust the pixels in the file. If you are ever going to make a different size image (do not use file xxx_810.psd), OPEN the file labeled xxx_BW.psd and do a “SAVE AS” rename it to xxx.57 (new size).psd, then resize the H, W, P and click OK.

Once you have a file sized correctly and are ready to print then you must bring the screen image up to 100% viewing, using the apple key plus the + symbol (on PC use Ctrl+). Then you may add some additional sharpening, if you wish, by going to Filter>Sharpen>Unsharp Mask and for starters set the Threshold to 0, Radius to 1.0, and amount from 50% to 150% (depending on image size, image texture, etc.) by watching the effect in the image window then click OK.

Then you may proceed to your printing method.

Create a New Folder and label it xxx_Printers and move all of you files created during this procedure into the folder. The folder is now ready to burn to CD or your method of archiving.

askRodger@pictureline.com
Rodger Newbold 2004

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