Update 2015: This is a re-post of a 2010 article I wrote for the Rawstudio blog, which at the time of writing is off-line. L1 cache sizes have not changed at all in 5 years. SSE 4.1 is more commonplace for flooring, but SSE2 is still needed for fallback. Intel has gather/scatter instructions on their...| defer time.Sleep()
The famous Lenna image, of Playboy model Lena Forsén, can’t be used in any more research papers published on IEEE, the organization announced this week. They’re following on the tails of the Nature journal, which banned the Lena image back in 2018. Michel P. Frank revealed on X an email he received from IEEE’s Technical […]| TechTheLead
An IIR filter deconvolving a blurred 2D image in four “recurrent” sequential passes. This post is a follow-up to my post on deconvolution/deblurring of the images. In my previous blog p…| Bart Wronski
Me being “progressively stippled.” :) Introduction I recently read the “Gaussian Blue Noise” paper by Ahmed et al. and was very impressed by the quality of their results and the rigor o…| Bart Wronski
This post covers a topic slightly different from my usual ones and something I haven’t written much about before – applied elements of probability theory. We will discuss what happens with “n…| Bart Wronski
In this shorter post, I will describe a 2X downsampling filter that I propose as a “safe default” for GPU image processing. It’s been an omission on my side that I have not proposed any specific fi…| Bart Wronski
Local tonemapping in action. HDRI texture credit: Greg Zaal, CC0. In this post I want to close the loop and come back to the topic I described ~6y ago! Local tonemapping (I’ll refer to it as LTM) &…| Bart Wronski
Discover moving object detection using OpenCV, blending contour detection with background subtraction for real-time application in security and traffic.| LearnOpenCV – Learn OpenCV, PyTorch, Keras, Tensorflow with code, & tutorials
PureRaw allows you to apply DxO’s noise removal and lens corrections to raw files without having to give up your favorite imaging software, such as Lightroom or Photoshop. The idea of creating raw files with enhanced ISO noise removal, sharpness and lens corrections while maintaining a Lightroom and Photoshop-based raw workflow intrigued me so I wanted to check it out and thought you might too.| Photo Cascadia