Hacker News with Generative AI: Image Processing

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
132 points by fanf2 1 day ago | 18 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 4 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 12 days ago | 81 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 21 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 24 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 32 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 33 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 36 days ago | 34 comments
Show HN: Jp3g: a fast private bulk image to JPEG/WebP converter (jp3g.org)
Image Processing, Software, Optimization, Web Development
5 points by rolandhvar 48 days ago | 3 comments
Attribute Extraction from Images Using DSPy (langtrace.ai)
DSPy recently added support for VLMs in beta. A quick thread on attributes extraction from images using DSPy. For this example, we will see how to extract useful attributes from screenshots of websites
Image Processing, Machine Learning, Computer Vision, Artificial Intelligence, Software
9 points by kakaly0403 50 days ago | 0 comments
Memory-safe PNG decoders now outperform C PNG libraries (reddit.com)
Memory Safety, Image Processing, Programming, Performance, C Programming
32 points by dralley 50 days ago | 6 comments
World Labs: Generate 3D worlds from a single image (worldlabs.ai)
3D Modeling, Artificial Intelligence, Image Processing, Computer Vision
487 points by dmarcos 57 days ago | 135 comments
Homography Explained with Code (opencv.org)
This tutorial will demonstrate the basic concepts of the homography with some codes.
Computer Vision, Image Processing, OpenCV, Programming, Mathematics
45 points by diginova 62 days ago | 7 comments
Watermark Anything (github.com/facebookresearch)
Implementation and pretrained models for the paper Watermark Anything. Our approach allows for embedding (possibly multiple) localized watermarks into images.
Computer Vision, Image Processing, Artificial Intelligence, Open Source, Facebook Research
314 points by zerojames 78 days ago | 108 comments
FLUX1.1 a Prompt Like "IMG_1018.CR2" (twitter.com)
Image Processing, Computer Vision, Machine Learning, Programming
18 points by amrrs 79 days ago | 2 comments
Physics-informed Shadowgraph Network: End-to-end Density Field Reconstruction (arxiv.org)
This study presents a novel approach for quantificationally reconstructing density fields from shadowgraph images using physics-informed neural networks
Physics, Machine Learning, Image Processing, Neural Networks
19 points by mixeden 82 days ago | 1 comments
BC7 optimal solid-color blocks (wordpress.com)
That’s right, it’s another texture compression blog post! I’ll keep it short. By “solid-color block”, I mean a 4×4 block of pixels that all have the same color. ASTC has a dedicated encoding for these (“void-extent blocks”), BC7 does not. Therefore we have an 8-bit RGBA input color and want to figure out how to best encode that color with the encoding options we have.
Graphics, Compression, Image Processing, Computer Graphics
14 points by luu 86 days ago | 1 comments
Leopard: A Vision Language Model for Text-Rich Multi-Image Tasks (arxiv.org)
Text-rich images, where text serves as the central visual element guiding the overall understanding, are prevalent in real-world applications, such as presentation slides, scanned documents, and webpage snapshots.
Computer Vision, Artificial Intelligence, Image Processing
6 points by PaulHoule 95 days ago | 0 comments
Show HN: AI Image Upscaler and Photo Enhancer with up to 10x resolution boost (imageupscaler.io)
Improve image quality, resolution, and clarity easily with our advanced AI image upscaler and photo enhancer.
AI, Image Processing, Photography, Software, Tools
38 points by mrafii 98 days ago | 32 comments
The magic (image resampling) kernel (johncostella.com)
“The magic kernel” is, today, a colloquial name for Magic Kernel Sharp, a world-beating image resizing algorithm, superior to the popular Lanczos kernels, which has helped power the two largest social media photo sites in the world, Facebook and Instagram.
Image Processing, Algorithms, Computer Vision
167 points by BoingBoomTschak 114 days ago | 37 comments
Vecint: Average Color (wunkolo.github.io)
In a previous post, I used Intel’s AMX instructions intended for AI/ML use-cases to take the average color of an image.
Image Processing, Computer Vision, AI/ML, Programming
27 points by qsantos 121 days ago | 4 comments
Building a compile-time SIMD optimized smoothing filter (scientificcomputing.rs)
I built a Savitzky-Golay filter (fancy name for a dot product with some known constants on a rolling window) and tried to optimize the crap out of it.
Optimization, Image Processing, Scientific Computing, Data Analysis
88 points by PaulHoule 122 days ago | 22 comments
Show HN: Fast and Exact Algorithm for Image Merging (github.com/C-Naoki)
This is a python implementation for stitching images by automatically searching for overlap region.
Computer Vision, Image Processing, Python, Algorithms
123 points by C-Naoki 125 days ago | 31 comments
New AI diffusion model approach solves the aspect ratio problem (news.rice.edu)
Artificial Intelligence, Generative AI, Image Processing, Computer Vision
51 points by gmays 130 days ago | 18 comments
Parallel PNG Proposal (2021) (github.com/DavidBuchanan314)
This is a proof-of-concept implementation of a parallel-decodable PNG format, based on ideas from https://github.com/brion/mtpng
Image Processing, Computer Vision, Data Compression, Open Source
43 points by networked 131 days ago | 3 comments
Tutorial on diffusion models for imaging and vision (arxiv.org)
The astonishing growth of generative tools in recent years has empowered many exciting applications in text-to-image generation and text-to-video generation.
Generative AI, Machine Learning, Computer Vision, Image Processing
221 points by Anon84 140 days ago | 18 comments
GraphicsMagick – a Swiss army knife of image processing (graphicsmagick.org)
GraphicsMagick is the swiss army knife of image processing.
Image Processing, Software, Tools
42 points by steph-123 146 days ago | 18 comments
sRGB Gamut Clipping (2021) (bottosson.github.io)
Color Management, Digital Art, Image Processing
90 points by Brajeshwar 146 days ago | 47 comments
Conversion to Grayscale (2011) (entropymine.com)
Image Processing, Computer Vision, Photography
13 points by not_a_boat 149 days ago | 7 comments
Show HN: I built image converters site that run in the browser (dynapik.com)
Web Development, Image Processing, Show HN, JavaScript
19 points by ralphilius 153 days ago | 6 comments