the last word

In the two previous posts, I identified some anomalies with Matlab’s implementation of bilinear interpolation downsampling at reduction ratios that are integral powers of two. I also observed smaller, but similar, anomalies with bicubic, Lanczos 2, and Lanczos 3 downsampling. Today I set out to find out if the Photoshop implementations of bilinear interpolation evinced… [Read More]

[Note. The bilinear and bicubic interpolation algorithms referred to in this article are the Matlab implementations. They are different from the Photoshop algorithms of the same or similar names. The Photoshop versions are reported on a few posts further on. Therefore, this post is primarily of academic interest.] In yesterday’s post I reported on the… [Read More]

[Note. The bilinear and bicubic interpolation algorithms referred to in this article are the Matlab implementations. They are different from the Photoshop algorithms of the same or similar names. The Photoshop versions are reported on a few posts further on. Therefore, this post is primarily of academic interest.] It is axiomatic in photography that photon… [Read More]

The show opened on Friday, My big print looked pretty good on the wall: Now we’ll see if it sells. I hope so; I don’t really have a good place for it in the house.

Kim Weston is a talented photographer who specializes in nudes.   He offers workshops both in the field and at Wildcat Hill,  his history-rich house and studio, where his grandfather, Edward Weston, lived, worked, and made many of his famous images. Kim had a workshop over the weekend, and asked me to come by to show… [Read More]