This is the fourth in a series of posts showing images that have been downsampled using several different algorithms Photoshop’s bilinear interpolation Ps bicubic sharper Lightroom export with no sharpening Lr export with Low, Standard, and High sharpening for glossy paper A complicated filter based on Elliptical Weighted Averaging (EWA), performed at two gammas and… [Read More]
Search Results for: downsampling
Comparing downsampling algorithm noise performance
In previous posts, we’ve seen numerical results of how various downsampling algorithms deal with Gaussian noise. Now it’s time to look at some pictures. The algorithms are: Photoshop’s bilinear interpolation Ps bicubic sharper Lightroom export with no sharpening Lr export with Low, Standard, and High sharpening for glossy paper A complicated filter based on Elliptical… [Read More]
Comparing Downsampling algorithms — Lindbloom’s desk
This is the second in a series of posts showing images that have been downsampled using several different algorithms Photoshop’s bilinear interpolation Ps bicubic sharper Lightroom export with no sharpening Lr export with Low, Standard, and High sharpening for glossy paper A complicated filter based on Elliptical Weighted Averaging (EWA), performed at two gammas and… [Read More]
Comparing downsampling algorithms — ISO 12233
For the next few posts, I’ll be showing images that have been downsampled using several different algorithms Photoshop’s bilinear interpolation Ps bicubic sharper Lightroom export with no sharpening Lr export with Low, Standard, and High sharpening for glossy paper A complicated filter based on Elliptical Weighted Averaging (EWA), performed at two gammas and blended at… [Read More]
Noise reduction and downsampling with a gamma of 2.2
[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]
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