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Photoshop CS Add Ons From Al Ward.
Monday November 15, 2004
by Al Ward

Al Ward has provided Imaging Revue with Phtoshop CS styles to download. These files are in a zip format and can be opened using both Stuffit and WinZip. For more information about Al please visit www.actionfx.com. Please stay tuned for a future discount for IR members to Al's site.

Profile FAQ And Instruction Manual
Sunday October 31, 2004
by IR Staff

We have compiled a new and up to date Profile FAQ. If you are ordering a printer profile, please make sure that you read the information contained here. Many of the questions you may have will be answered here. These articles are in PDF format.

Patching and Healing with Martin Evening.
Friday October 22, 2004
by Martin Evening

The third in a series of tutorials, Martin discusses the Healing Brush and Patch Tool. Martin's video tutorial accompanies this PDF and can be uncompressed using WinZip or the Stuffit expander. Published with permission of Focal Press Publishers, a division of Elsevier. Copyright 2004. For more information about this book and other Focal Press titles, please visit www.focalpress.com.

Nikon Scanning Workflow
Friday October 15, 2004
by Scott Martin

Scott Martin has deciphered Nikon's workflow technology and brings us this quick guide to achieving great scans. For more information on Scott and his work, please visit www.on-sight.com.

Image Adjustments with Martin Evening.
Friday October 8, 2004
by Martin Evening

The second in a series of tutorials, Martin discusses the Photo Filter and Color Temperature. Martin's video tutorial accompanies this PDF and can be uncompressed using WinZip or the Stuffit expander. Published with permission of Focal Press Publishers, a division of Elsevier. Copyright 2004. For more information about this book and other Focal Press titles, please visit www.focalpress.com.

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Digital Capture > Image Processing & Workflow > image interpolation

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AuthorSubject: image interpolation   [Go to Bottom of Page]
Scott Nuelken
Posted on Wed Jan 21, 2004 4:16 PM

Recently I needed to answer the question of what is the best way to interpoate a digital image to get it to a large size. I tested it 8 ways, in all of the step interpolation methods I did it in 5% increments. The origional image was shot on a valeo 11, and processed in RAW to the base amount(no interpolation of the RAW data. Unless otherwise said.) All work was on the image in 16bit. The image was of a powerboat inboard motor shot in the studio. Lotsa very fine detail in the hoses and wires. The work was done in PS CS unless otherwise stated.

Nearest neighbor: garbage
bilenear: Next to garbage, not usable
Bi-cubic sharper: looks like someone traced the contous with a sharpie. not usable
Bi-cubic softer: ok but image is so soft that sharpening is difficult. Would be fine from the proper viewing distance.
Bi-cubic: best results of step interpolation, held minute detail well, not oversharp. Was able to get great results with proper sharpening.
No interpolation, just set in Image Size 20X30 @ 240ppi: As good in many ways as the bi-cubic. Held some detail that bi-cubic lost. Still very impressive.
Camera RAW/additional bi-cubic(to get it upto the target size): Not as good as using bi-cubic the whole way. Some artifacting around contrasty areas.
LEAF Capture 8.2.1 interpolation: poor. not entirely unusable, but not as impressive as some of the others. Wouldnt print it here though.

What do you guys think? does this sound like any tests that you have run? Was I missing anything in these test? Should I have looked for anything else?

Thanks for any responses.
Scott
Scott@dresslerphoto.com


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