[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]
Search Results for: downsampling
Downsampling and averaging
In yesterday’s post, I downsampled images successively, a factor of two at each step, in an attempt to get averaging at the same time. I was working with the images today, and it didn’t look like I was getting the desired effect. Then it hit me. I was doing exactly the wrong thing. Downsamping by… [Read More]
Downsampling with Lightroom
These days I’m as likely to reduce resolution when printing as I am to increase it. The slit scan files come out of the camera at up to 9000×64000 pixels. The sweep panos are typically 8000×24000. Even if you’re not using such extreme file sizes, you may be downsampling too. If you’ve got a D800… [Read More]
Two ways to make 100 MP pixel-shifted images with the GFX 100S
This is one in a series of posts on the Fujifilm GFX 100S. You should be able to find all the posts about that camera in the Category List on the right sidebar, below the Articles widget. There’s a drop-down menu there that you can use to get to all the posts in this series;… [Read More]
Three dimensionality and sensor format
A conventional photograph, whether seen on a screen or printed, is two-dimensional. Yet some photographs appear to capture a sense of depth. There are several things that can affect this. Chromostereopsis Spherical aberration Perspective effects But the effect is not well understood, and there is much more heat than light when this topic arises in… [Read More]