I'm ZHOU Jie, a Microsoft MVP since 2023 and author of the “.NET骚操作” blog. For over a decade I've been bringing OCR, LLMs, media and high-performance computing to .NET — and now even the image codecs, the inference engine andGMP-class arbitrary precision are pure C#.
// Sdcb.SimdCodecs —— image decoding, zero native deps
byte[] file = File.ReadAllBytes("scan.tif"); // JPEG · PNG · TIFF · WebP · GIF · JP2 · JBIG2
SimdCodecs.TryReadInfo(file, out ImageInfo info); // headers only
byte[] bgra = new byte[info.Width * info.Height * 4];
// straight into your buffer: BGRA / RGB / grey, any stride
SimdCodecs.TryDecodeInto(file, bgra, info.Width * 4, ImagePixelFormat.Bgra32);
Now
SimdCodecs 1.0Image codecs in pure managed C#: JPEG, PNG, TIFF, WebP, GIF, JPEG 2000 and JBIG2, plus EXIF and ICC. No native DLLs, yet JPEG decoding takes 0.82× libjpeg-turbo’s time — the last piece of a pure-C# vision stack: file → pixels.
Pure-C# PP-OCRv6: hand-written SIMD kernels; 2.0 adds Vulkan / Metal GPU — 15× end-to-end on a 3080 Ti.
GMP / MPFR-class arbitrary precision in pure managed C#, zero native deps — compiled to WASM, it zooms the Mandelbrot set 10³⁰⁰× in your browser.
Pure-C# Hunyuan translation on the GPU: 15.8k tok/s prefill on a 3080 Ti, weights on NuGet.
A 3D gravitational symphony that plays the moment it opens: 65,536-star galaxy collisions, periodic three-body orbits and the real Solar System, computed live on WebGPU.
Evolution
Five years, three answers to the same question: how do .NET developers get the best OCR?
Binds the native Paddle Inference runtime
Binds the native Intel OpenVINO™ runtime
The inference engine itself is C#
Open source
.NET bindings for Baidu Paddle Inference — PaddleOCR, PaddleDetection and more, out of the box. One of the most popular OCR stacks in .NET.
A high-quality .NET wrapper for the Intel OpenVINO™ toolkit — fast, frugal inference on CPUs and iGPUs.
Low-level FFmpeg API for .NET generated by CppSharp — decoding, encoding, filters, muxing.
.NET numerics for the AI era: GMP / MPFR-class arbitrary-precision integers, rationals and correctly rounded floats in pure managed C# — zero native deps, SIMD-accelerated, and a 10³⁰⁰× Mandelbrot dive in your browser.
Pure-C# GCDRNet document shadow removal & appearance enhancement: bundled ONNX graph compiler, hand-written SIMD kernels, zero inference-engine deps; Vulkan / Metal / WASM.
A fast, sandboxed C# runner built for LLM code interpreters over MCP.
Writing
119 posts on cnblogs and WeChat, from Direct2D in 2013 to hand-written SIMD in 2026. (Written in Chinese.)
Community
Three QQ groups, five WeChat groups and an official account — mostly Chinese-speaking. Questions, ideas, or just lurking — all welcome.
Join the community
From a C++ programmer writing Direct2D in 2013 to a .NET developer hand-writing SIMD inference kernels today. I believe C# can do far more than most people think — every project on this site is an attempt to prove it.
About me