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the last word

Photography meets digital computer technology. Photography wins -- most of the time.

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Resampling for printing, revisited 2

June 22, 2011 JimK Leave a Comment

This next set of images is based on a 240 ppi target scaled to the 360 ppi printer resolution. Because the target is the same 150 pixel on a side target, the images on paper are somewhat smaller. Here are the results, followed by an analysis. Photoshop Bicubic Smoother (above) Perfect Resize (above) Qimage Hybrid… [Read More]

Technical, The Last Word

Resampling for printing, revisited

June 21, 2011 JimK Leave a Comment

Four or five months ago, I did a series of posts on resampling for printing. You can read the summary here. Since then, a new version of Qimage has been introduced. It has a new algorithm, called “Fusion”, which is supposed to give better results than the “hybrid” algorithm. Also, there is been a new… [Read More]

Technical, The Last Word

What’s your site’s rank?

May 19, 2011 JimK Leave a Comment

If you’re at all compulsive, you should probably stop reading right here. For the rest of you, and for the compulsive ones who just can’t help themselves, I’d like to pass on a little tidbit that I got from Brooks Jensen at last weekend’s workshop. You’ve probably noticed the sales rankings at Amazon. If you’ve… [Read More]

Technical, The Last Word

The monitor brightness dilemma solved

April 1, 2011 JimK Leave a Comment

In my last post, I was bemoaning the choice between setting your monitor to a high brightness level so that it’s comfortable for most things and setting it to a lower level to get more accurate soft proofing. It turns out that with the NEC PA series monitors you can have your cake and eat… [Read More]

Technical, The Bleeding Edge

On-site service

March 6, 2011 JimK Leave a Comment

If a personal computer is a computer that you have all to yourself, my first personal computer was a Hewlett-Packard 2114, which was assigned to me in 1970 when I was working at hp. It came with a form of onsite service; if anything broke, I’d either swap the new part in myself or call… [Read More]

Technical, The Bleeding Edge

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Articles

  • About
    • Patents and papers about color
    • Who am I?
  • How to…
    • Backing up photographic images
    • How to change email providers
    • How to shoot slanted edge images for me
  • Lens screening testing
    • Equipment and Software
    • Examples
      • Bad and OK 200-600 at 600
      • Excellent 180-400 zoom
      • Fair 14-30mm zoom
      • Good 100-200 mm MF zoom
      • Good 100-400 zoom
      • Good 100mm lens on P1 P45+
      • Good 120mm MF lens
      • Good 18mm FF lens
      • Good 24-105 mm FF lens
      • Good 24-70 FF zoom
      • Good 35 mm FF lens
      • Good 35-70 MF lens
      • Good 60 mm lens on IQ3-100
      • Good 63 mm MF lens
      • Good 65 mm FF lens
      • Good 85 mm FF lens
      • Good and bad 25mm FF lenses
      • Good zoom at 24 mm
      • Marginal 18mm lens
      • Marginal 35mm FF lens
      • Mildly problematic 55 mm FF lens
      • OK 16-35mm zoom
      • OK 60mm lens on P1 P45+
      • OK Sony 600mm f/4
      • Pretty good 16-35 FF zoom
      • Pretty good 90mm FF lens
      • Problematic 400 mm FF lens
      • Tilted 20 mm f/1.8 FF lens
      • Tilted 30 mm MF lens
      • Tilted 50 mm FF lens
      • Two 15mm FF lenses
    • Found a problem – now what?
    • Goals for this test
    • Minimum target distances
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Printable Siemens Star targets
    • Target size on sensor
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Test instructions — postproduction
    • Test instructions — reading the images
    • Test instructions – capture
    • Theory of the test
    • What’s wrong with conventional lens screening?
  • Previsualization heresy
  • Privacy Policy
  • Recommended photographic web sites
  • Using in-camera histograms for ETTR
    • Acknowledgments
    • Why ETTR?
    • Normal in-camera histograms
    • Image processing for in-camera histograms
    • Making the in-camera histogram closely represent the raw histogram
    • Shortcuts to UniWB
    • Preparing for monitor-based UniWB
    • A one-step UniWB procedure
    • The math behind the one-step method
    • Iteration using Newton’s Method

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