Digital Technical Notes

Sharpening

Ron Bigelow has written very good articles describing the many aspects of sharpening your digital photograph. He describes his articles as a "thinking person's guide to sharpening". www.ronbigelow.com/articles/articles.htm ... see links below...

Part One explains what sharpening is, why it is needed and how Unsharp Mask works.

Part Two goes into the general considerations of sharpening, the various Unsharp Mask settings and points to the problems of single pass sharpening.

Part Three looks at the Smart Sharpen tool in Photoshop CS2 and High Pass Sharpening.

Part Four is about LAB based sharpening and Layer Based / Luminosity mode sharpening.

Balancing Light and Dark in a Low Light Situation

An article by Robin Russell which explains how he goes about balancing foreground and backgound light in a low light situation.

Save for the Web:

For Photoshop 5.5 or better. -

1. Quick Introduction to Save for the Web dialogue box.
   
   
2. Longer step by step explainations - walking you through - Save for Web.

Depth of Field, Aperture, Circles of Confusion:

John Greenwood's Exposure articles contain some interesting information and experiences, these archived articles deal with technical issues:

• April 2004 Exposure talks about depth of field.
• May 2004 Exposure is about aperture, depth of field, circles of confusion, and viewing distance.