Hacker News with Generative AI: Image Processing

How to reverse engineer AI models: a study on Google Photos (skyld.io)
Google Photos is one of the most widely-used photo management applications globally, pre-installed on almost every Android device running Google Mobile Services (GMS). It is appreciated by users because it offers powerful features like “Magic Eraser” and advanced AI-powered photo editing tools. Of course, Google doesn’t open-source its AI models to keep its competitive edge.
Reverse Engineering, AI Models, Google Photos, Image Processing
10 points by superkitten 4 days ago | 6 comments
Generative Modelling in Latent Space (sander.ai)
Most contemporary generative models of images, sound and video do not operate directly on pixels or waveforms. They consist of two stages: first, a compact, higher-level latent representation is extracted, and then an iterative generative process operates on this representation instead. How does this work, and why is this approach so popular?
Generative AI, Machine Learning, Image Processing, Sound Processing, Video Processing
15 points by xavriley 18 days ago | 0 comments
Watermark segmentation (github.com/Diffusion-Dynamics)
This repository by Diffusion Dynamics, showcases the core technology behind the watermark segmentation capabilities of our first product, clear.photo. This work leverages insights from research on diffusion models for image restoration tasks.
Image Processing, Computer Vision, Diffusion Models, Open Source
32 points by abriosi 18 days ago | 21 comments
Doing the Prospero-Challenge in RPython (pypy.org)
Recently I had a lot of fun playing with the Prospero Challenge by Matt Keeter. The challenge is to render a 1024x1024 image of a quote from The Tempest by Shakespeare. The input is a mathematical formula with 7866 operations, which is evaluated once per pixel.
Programming, Challenges, Python, Image Processing, Shakespeare
29 points by tekknolagi 23 days ago | 2 comments
Estimating Camera Motion from a Single Motion-Blurred Image (jerredchen.github.io)
Given a single motion-blurred image, we exploit the motion blur cues to predict the camera velocity at that instant without performing any deblurring.
Computer Vision, Image Processing, Motion Estimation
71 points by smusamashah 36 days ago | 20 comments
Show HN: I built a tool to add noise texture to your images (vercel.app)
Drop or select a file
Image Processing, Tools, Show HN
53 points by Rayid 37 days ago | 40 comments
High-Performance PNG Decoding (blend2d.com)
It's been some time I have written about a High-Performance QOI Codec, which joined other codecs offered by Blend2D library in 2024. The development of image codecs continued and now I would like to announce a new high-performance PNG codec, which is much faster than other available codecs written in C, C++, and other programming languages.
Image Processing, Performance Optimization, PNG, C++, Programming Languages
84 points by PaulHoule 41 days ago | 8 comments
StarVector: Generating Scalable Vector Graphics Code from Images and Text (starvector.github.io)
StarVector represents a breakthrough in Scalable Vector Graphics (SVG) generation, seamlessly integrating visual and textual inputs into a unified foundation SVG model.
Image Processing, Text Processing, AI, Code Generation
72 points by lnyan 42 days ago | 7 comments
Image Dithering: Eleven Algorithms and Source Code (tannerhelland.com)
Today’s graphics programming topic - dithering - is one I receive a lot of emails about, which some may find surprising.
Graphics Programming, Algorithms, Source Code, Image Processing
9 points by ibobev 46 days ago | 0 comments
Compression of Spectral Images Using Spectral JPEG XL (jcgt.org)
Image Compression, Image Processing, JPEG XL
91 points by ksec 48 days ago | 13 comments
Paint.net 5.1.5 Is Now Available with JPEG XL Support (getpaint.net)
This update adds JPEG XL (*.jxl) support, improves quantization color quality, updates AVIF loading to better handle mapping HDR images to SDR, and fixes some bugs.
Software, Image Processing, New Releases, Bug Fixes
8 points by ksec 48 days ago | 0 comments
Arbitrary-Scale Super-Resolution with Neural Heat Fields (therasr.github.io)
Thera is the first arbitrary-scale super-resolution method with a built-in physical observation model.
Super-Resolution, Image Processing, Computer Vision, Artificial Intelligence, Neural Networks
151 points by 0x12A 49 days ago | 56 comments
Image Processing in C (2000) [pdf] (ed.ac.uk)
Image Processing, C Programming, Computer Science, Technical Documents, 1990s
139 points by nill0 50 days ago | 26 comments
Fast-PNG: PNG image decoder and encoder (github.com/image-js)
PNG image decoder and encoder written entirely in JavaScript.
JavaScript, Image Processing, PNG, Software, Open Source
48 points by javatuts 53 days ago | 20 comments
Dithering in Colour (obrhubr.org)
After reading a post on the HN frontpage from amanvir.com about dithering, I decided to join in on the fun. Here’s my attempt at implementing Atkinson dithering with support for colour palettes and correct linearisation.
Dithering, Image Processing, Programming, Color Theory
168 points by surprisetalk 54 days ago | 65 comments
Creating static map images with OpenStreetMap, Web Mercator, and Pillow (alexwlchan.net)
I’ve been working on a project where I need to plot points on a map. I don’t need an interactive or dynamic visualisation – just a static map with coloured dots for each coordinate.
Mapping, Python, OpenStreetMap, Image Processing, Visualization
5 points by todsacerdoti 57 days ago | 0 comments
Commodore 64 PETSCII Image (2022) (medium.com)
It is said that life begins at the age of 40 — I hope it is true … After 23 years of working in IT and spending the last 12 years in a company I co-founded, my contract was terminated, I lost my job and I suddenly found myself almost overnight in a situation where I have all day ahead with no schedule, no deadlines, no important phone calls, no one is waiting for my analysis, consultation or technical specification.
Commodore 64, Retro Computing, Pixel Art, Image Processing, Personal Reflections
57 points by erickhill 58 days ago | 12 comments
MS Paint IDE (ms-paint-i.de)
MS Paint IDE is a program that can read a normal image file saved with MS Paint, and can then translate it to text with the ability to highlight the text in the image, parse the code, compile and execute it.
Programming, Software, Image Processing, Tools
220 points by smusamashah 59 days ago | 75 comments
Dramatically improve microscope resolution with Fourier Ptychography [video] (youtube.com)
Microscopes, Optics, Image Processing, Science, Videos
5 points by MaximilianEmel 61 days ago | 1 comments
Encrypt Images Without a Key Using Visual Cryptography (github.com/coduri)
VisualCrypto is an open-source Python-based toolkit with a web interface designed for Visual Secret Sharing (VSS), a cryptographic technique that splits a secret image into multiple shares.
Cryptography, Python, Security, Open Source, Image Processing
8 points by italianguy 62 days ago | 2 comments
Show HN: Automated Sorting of group photos by user defined N people in each pic (github.com/Karvy-Singh)
Sort photos based on the criteria of "Me with my favorite people (x, y, z...)" out of a bunch of group photos/random photos.
Computer Vision, Image Processing, Machine Learning, Software
32 points by Karvy 87 days ago | 3 comments
Bilinear down/upsampling, aligning pixel grids, and that infamous GPU half pixel (2021) (bartwronski.com)
See this ugly pixel shift when upsampling a downsampled image? My post describes where it can come from and how to avoid those!
Image Processing, Computer Graphics, GPU, Pixel Manipulation, Downsampling/Upsampling
136 points by fanf2 95 days ago | 23 comments
Detecting edges of images at the speed of light (phys.org)
Physicists from the group of Jorik van de Groep at the UvA-Institute of Physics have devised a new method that can be used to detect edges of images in an extremely energy efficient and ultrafast way.
Image Processing, Physics, Computer Science
101 points by bookofjoe 96 days ago | 27 comments
Subpixel Zoo: A Catalog of Subpixel Geometry (geometrian.com)
An image pixel might be a little square with a flat color[1], but to actually present the image on a physical display (or related technology), we illuminate discrete 'subpixels'. The perceived color in an area is then the addition of the subpixels' emissions in that area.
Computer Graphics, Display Technology, Image Processing
3 points by tigerlily 98 days ago | 0 comments
How hard would it be to display the contents of an image file on the screen? (nereid.pl)
How hard would it be to display the contents of an image file on the screen? You just load the image pixels somehow, perhaps using a readily available library, and then display those pixels on the screen. Easy, right? Well, not quite, as it turns out.
Programming, Computer Graphics, Image Processing
214 points by ingve 106 days ago | 82 comments
Deformable Image Registration KU Repository (github.com/ThomasAlscher1991)
The Deformable Image Registration KU repository contains software developed at the Department of Computer Science at the University of Copenhagen dealing with flow based image registration.
Software, Image Processing, Computer Science
9 points by alonfnt 116 days ago | 3 comments
Combining 15s interval whole-sky-camera photos to form a 4y spanning keogram (astrodon.social)
Astronomy, Image Processing, Data Visualization, Time-lapse Photography
531 points by nebalee 118 days ago | 83 comments
Racket-embed-images-in-source-text (github.com/shriram)
Racket enables you to embed images in the document source. The moment you do, however, the file becomes a different format (WXME). In particular, this format is effectively binary, which means it doesn't work well with tools like grep, git, etc.
Programming, Racket, Software, Image Processing, Version Control
50 points by spdegabrielle 127 days ago | 9 comments
Sub-pixel distance transform (2023) (acko.net)
This page includes diagrams in WebGPU, which has limited browser support. For the full experience, use Chrome on Windows or Mac, or a developer build on other platforms.
Computer Graphics, Image Processing, WebGPU
183 points by ChadNauseam 127 days ago | 25 comments
Spectral Imaging Made Easy: A Powerful Python Library (github.com/siapy)
Spectral imaging analysis for Python (SiaPy) is a tool for efficient processing of spectral images.
Spectral Imaging, Python, Image Processing, Libraries
62 points by janezla 131 days ago | 34 comments