Graphics Tips

Adobe Photoshop Tip: Add a little strength to details without 'sharpening'

Page: 1/2
By: Rick Yaeger

This is a quick tip that will help greyscale images survive being printed in newspaper or run through a FAX machine. It utilizes a seldom used standard Photoshop filter called "High Pass".

What High Pass does is it isolates high-contrast image areas at a user specified pixel radius turning much of the image grey and leaving edge details untouched. The desired effect can be attained by adjusting the radius value — a setting of 100 will leave most images unaffected while a setting of 1 will turn an image almost entirely a monotone grey. Somewhere in the middle is a usefull filter waiting to be discovered.

Step 1: Bring your greyscale image into Photoshop and duplicate it on a second layer within the same document.




Step 2: Find the High Pass filter under Filter>Other>High Pass... and apply the filter at a setting of 10 pixels.

What you will be left with is an image that may resemble a screen shot from a '50's era television broadcast. Don't worry, it won't for long.

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