-
Recent Posts
- How I use ChatGPT daily (scientist/coder perspective) January 22, 2024
- Praising hacking and low-tech solutions. ChatGPT wrote me a personal Javascript browser “plugin.” September 17, 2023
- I left Silicon Valley for NYC 2.5y ago – a retrospective September 4, 2023
- Gradient-descent optimized recursive filters for deconvolution / deblurring September 5, 2022
- Progressive image stippling and greedy blue noise importance sampling August 31, 2022
Categories
-
Recent Posts
- How I use ChatGPT daily (scientist/coder perspective) January 22, 2024
- Praising hacking and low-tech solutions. ChatGPT wrote me a personal Javascript browser “plugin.” September 17, 2023
- I left Silicon Valley for NYC 2.5y ago – a retrospective September 4, 2023
- Gradient-descent optimized recursive filters for deconvolution / deblurring September 5, 2022
- Progressive image stippling and greedy blue noise importance sampling August 31, 2022
Archives
- January 2024 (1)
- September 2023 (2)
- September 2022 (1)
- August 2022 (1)
- May 2022 (1)
- March 2022 (2)
- February 2022 (2)
- January 2022 (2)
- November 2021 (1)
- October 2021 (2)
- July 2021 (2)
- June 2021 (1)
- May 2021 (1)
- April 2021 (1)
- February 2021 (2)
- January 2021 (2)
- December 2020 (1)
- August 2020 (1)
- May 2020 (1)
- April 2020 (2)
- March 2020 (1)
- February 2020 (1)
- January 2020 (1)
- September 2019 (1)
- August 2019 (1)
- May 2018 (1)
- October 2017 (1)
- August 2017 (1)
- April 2017 (2)
- October 2016 (4)
- September 2016 (2)
- August 2016 (1)
- June 2016 (1)
- October 2015 (2)
- March 2015 (2)
- February 2015 (1)
- December 2014 (1)
- October 2014 (1)
- September 2014 (4)
- August 2014 (4)
- July 2014 (2)
- June 2014 (2)
- May 2014 (2)
- April 2014 (3)
- March 2014 (4)
- February 2014 (2)
- January 2014 (3)
Categories
Author Archives: bartwronski
How I use ChatGPT daily (scientist/coder perspective)
We all know how the internet works—lots of “hot takes,” polarizing opinions, trolling, and ignorance. Recently, everyone has opinions on AI and LLMs/GenAI in particular. I won’t focus here on “gold rush” influencers, bad grifters, people who build their business … Continue reading
Posted in Code / Graphics
Tagged ai, artificial-intelligence, chatgpt, machine learning, productivity, programming, technology
4 Comments
Praising hacking and low-tech solutions. ChatGPT wrote me a personal Javascript browser “plugin.”
Intro I love unsophisticated solutions with minimal dependencies. There is a reason the blog you are reading right now is on wordpress.com and ugly – the friction from a post idea and starting to write it to finally publishing a … Continue reading
I left Silicon Valley for NYC 2.5y ago – a retrospective
Intro Around the end of March 2021, I was finishing packing and ready to leave my home of almost five years… the (in)famous Silicon Valley moving to New York City. This was a well-thought-out and long-term decision (rare for me; … Continue reading
Posted in Travel / Photography
3 Comments
Gradient-descent optimized recursive filters for deconvolution / deblurring
This post is a follow-up to my post on deconvolution/deblurring of the images. In my previous blog post, I discussed the process of “deconvolution” – undoing a known convolution operation. I have focused on traditional convolution filters – “linear phase, … Continue reading
Posted in Code / Graphics
Tagged algorithms, digital signal processing, graphics, graphics programming, image processing, jax, maths, numpy, python, signal processing
Leave a comment
Progressive image stippling and greedy blue noise importance sampling
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 of their method. They provide a theoretical framework to analyze the quality of blue … Continue reading
Posted in Code / Graphics
Tagged algorithms, blue noise, dithering, graphics, graphics programming, image processing, jax, programming, python, sampling
3 Comments
Removing blur from images – deconvolution and using optimized simple filters
In this post, we’ll have a look at the idea of removing blur from images, videos, or games through a process called “deconvolution”. We will analyze what makes the process of deblurring an image (blurred with a known blur kernel) … Continue reading
Posted in Code / Graphics
5 Comments
Transforming “noise” and random variables through non-linearities
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 “noise” – a random variable – when we apply … Continue reading
Posted in Code / Graphics
Tagged blue noise, graphics, graphics programming, image processing, jax, mathematics, maths, noise, programming, python
Leave a comment
Fast, GPU friendly, antialiasing downsampling filter
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 filter despite writing so … Continue reading
Posted in Code / Graphics
Tagged filtering, graphics, graphics programming, image processing, jax, postprocessing, signal processing
6 Comments
Exposure Fusion – local tonemapping for real-time rendering
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) – a component I considered a missing piece in video games rendering, especially … Continue reading
Posted in Code / Graphics
Tagged bilateral, graphics, graphics programming, image processing, postprocessing, tonemapping
Leave a comment
Light transport matrices, SVD, spectral analysis, and matrix completion
In this post I’ll describe a small hike into the landscape of using linear algebra methods for analyzing seemingly non-algebraic problems, like light transport. This is very common in some domains of computer science / electrical engineering (seeing everything as … Continue reading
Insider guide to tech interviews
I’ve been meaning to write this post for over a year… an unofficial insider guide to tech interviews! This is the essence of the advice I give my friends (minus personal circumstances and preferences) all the time, and I figured … Continue reading
Posted in Code / Graphics
6 Comments
Procedural Kernel (Neural) Networks
Last year I worked for a bit on a fun research project that ended up published as an arXiv “pre-print” / technical report and here comes a few paragraph “normal language” description of this work. Neural Networks are taking over … Continue reading
Posted in Code / Graphics
Tagged image processing, linear algebra, machine learning, maths, signal processing
Leave a comment
Study of smoothing filters – Savitzky-Golay filters
Last week I saw Daniel Holden tweeting about Savitzky-Golay filters and their properties (less smoothing than a Gaussian filter) and I got excited… because I have never heard of them before and it’s an opportunity to learn something. When I … Continue reading
Posted in Code / Graphics
Tagged algorithms, digital signal processing, image processing, maths, python, signal processing
Leave a comment
Practical Gaussian filtering: Binomial filter and small sigma Gaussians
Gaussian filters are the bread and butter of signal and image filtering. They are isotropic and radially symmetric, filter out high frequencies extremely well, and just look pleasant and smooth. In this post I will cover two of my favorite … Continue reading
Modding Korg MS-20 Mini – PWM, Sync, Osc2 FM
Almost every graphics programmer I know is playing right now with some electronics (virtual high five!), so I won’t be any different. But I decided to make it “practical” and write something that might be useful to others – how … Continue reading
Posted in Audio / Music / DSP
Tagged analog gear, electronics, korg, ms20, music, synthesizers, synths
4 Comments
Processing aware image filtering: compensating for the upsampling
This post summarizes some thoughts and experiments on “filtering aware image filtering” I’ve been doing for a while. The core idea is simple – if you have some “fixed” step at the end of the pipeline that you cannot control … Continue reading
Posted in Code / Graphics
Tagged algorithms, digital signal processing, filtering, graphics, image processing, jax, postprocessing, signal processing
14 Comments
Comparing images in frequency domain. “Spectral loss” – does it make sense?
Recently, numerous academic papers in the machine learning / computer vision / image processing domains (re)introduce and discuss a “frequency loss function” or “spectral loss” – and while for many it makes sense and nicely improves achieved results, some of … Continue reading
Posted in Code / Graphics
Tagged algorithms, image processing, linear algebra, machine learning, maths, neural networks
15 Comments
On leaving California and the Silicon Valley
Beginning of the year, my wife and I made a final call – to leave California, “as soon as possible”. To be fair, we talked about this for a long time; a few years, but without any concrete date or … Continue reading
Posted in Travel / Photography
12 Comments
Neural material (de)compression – data-driven nonlinear dimensionality reduction
In this post I come back to something I didn’t expect coming back to – dimensionality reduction and compression for whole material texture sets (as opposed to single textures) – a significantly underexplored topic. In one of my past posts … Continue reading
Superfast void-and-cluster Blue Noise in Python (Numpy/Jax)
This is a super short blog post to accompany this Colab notebook. It’s not an official part of my dithering / Blue Noise post series, but thematically fits it well and be sure to check it out for some motivation … Continue reading
Posted in Code / Graphics
Tagged blue noise, dithering, graphics programming, jax, numpy, python
3 Comments
You must be logged in to post a comment.