This is the sixth in a series of posts on the effect of camera resolution on the quality of downsampled images. The series starts here. In the first post in this series, I used Lightroom to process images of a Siemens Star, in an attempt to find out how well the superior image quality of a… [Read More]
Search Results for: downsampling
Camera resolution and 4K viewing — downsampling algorithms
This is the fifth in a series of posts on the effect of camera resolution on the quality of downsampled images. The series starts here. In the first post in this series, I used Lightroom to process images of a Siemens Star, in an attempt to find out how well the superior image quality of a… [Read More]
Aliasing visibility and PS downsampling
I interrupt the series of posts on DOF for this one that proves a point that most of my blog readers already know: in general downsampling can cause aliasing, and in particular the downsampling algorithms in Photoshop do cause aliasing, at least some of the time. I’ve addressed this issue before, with spectral plots showing… [Read More]
Noise reduction with nonlinear tools and downsampling
In the last half-dozen posts, I’ve explored the noise reduction effects and quality of the results from six or seven different downsampling methods. From doing that work, I’ve concluded that there are several choices for someone with a small-pixel camera to produce images that have similar noise characteristics as those made with a large-pixel camera,… [Read More]
Noise performance of downsampling with eliptical weighted averaging
Over on the Luminous Landscape forum, Nicolas Robidoux, Bart van der Wolf, Alan Gibson, and others have been working on developing downsampling algorithms. They’re using the command-line image editor ImageMagick as the engine to do the work, so their methodology is to write scripts that call ImageMagick. Some of their algorithms are producing impressive results,… [Read More]
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