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Slit scan cloudscapes

June 6, 2012 By JimK Leave a Comment

We’ve had some spectacular clouds over the last two days. Here are some slit scans. The first three are infrared.

Slit scans of plants

June 4, 2012 By JimK 1 Comment

I have some succulents that my wife propagated from a cutting Don Worth gave to me. I interviewed Don for the CPA Newsletter, Focus, about ten years ago. You can find the interview here.  The succulent was created by Don — it’s a hybrid of Echeveria Shaviana and Echeveria Subrigida, and it’s called Echeveria Afterglow. Slit scans… [Read More]

Res-ing down in one dimension

May 31, 2012 By JimK 1 Comment

I posted earlier about my need to res down 60000 x 6000 images to 6000 x 6000. I was thinking about using Pixel Bender, but I came up with a workaround that does most of what I’d do in Pixel Bender, needs no programming, and works in all versions of Photoshop. They key idea is… [Read More]

Structure and creativity, revisited

May 27, 2012 By JimK 2 Comments

Five years ago today, I posted some thoughts on creativity and constraints. You can read them here. Huntington Witherill wrote an eloquent dissent. It’s in a comment to the post. Ten days ago, Brooks Jensen posted a podcast, the teaser for which was: If creativity is a free-flowing, spontaneous activity, won’t a structure constrict the creative process?… [Read More]

Adobe Pixel Bender

May 27, 2012 By JimK 1 Comment

When I’m editing the slit scan pictures, I often res down a 60,000 x 6000 pixel image to a 6000 x 6000 one, compressing the time axis. I’ve not found an appropriate resolution changing tool, nor have I found a good Photoshop filter to do the averaging of 10 or so pixels in only one… [Read More]

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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
  • 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 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
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    • Printable Siemens Star targets
    • Target size on sensor
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Test instructions — postproduction
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    • 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
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    • Normal in-camera histograms
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    • 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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Recent Comments

  • JimK on Sony a7RIV with pixel-shift vs Fujifilm GFX 100
  • Ludwig Haskins on Sony a7RIV with pixel-shift vs Fujifilm GFX 100
  • Anthony New on Camera resolution and 4K viewing — summary
  • Ilya Zakharevich on Does repeated JPEG compression ruin images?
  • JimK on Does repeated JPEG compression ruin images?
  • JimK on Does repeated JPEG compression ruin images?
  • CarVac on Does repeated JPEG compression ruin images?
  • JimK on Detectability of visual signals below the noise
  • JimK on Does repeated JPEG compression ruin images?
  • Bill Claff on Detectability of visual signals below the noise

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Unless otherwise noted, all images copyright Jim Kasson.