// 01
The Modules
20 / 20 ONLINEEach module is a self-contained interactive notebook. Drag, scrub, click anything. Every visualization runs locally in your browser — real math, no canned animations.
CORTEX.LAB / INTERACTIVE CV LABORATORY / V0.4
Computer vision,
made visible.
read about it. play with it.
A live laboratory for convolutions, kernels, embeddings & neural architectures. Every concept is a slider, every tensor a shape you can rotate, every gradient an animation. No tutorials. No videos. Just experiments.
↹ traverse modules
⌘ K command palette
Space play/pause sims
R randomize
20
Modules
85
Live Experiments
∞
Tensor States
0
Server Calls
M01 · FOUNDATIONS
↗
Matrix & Tensor Playground
Rotate, multiply, broadcast. Watch shapes cascade through dimension flips and dot products in real time.
M02 · FOUNDATIONS
↗
Convolution Kernels
Scrub a 3×3 kernel across procedural imagery. Sobel, Laplacian, custom — see every multiply & accumulate.
M03 · FOUNDATIONS
↗
Feature Extraction
From edges to eyes. Walk the hierarchy of representations from layer 1 through layer 18.
M04 · FOUNDATIONS
↗
Activation Functions
The non-linear bend that makes deep nets work. Plot f(x) and its gradient; compare ReLU, GELU, sigmoid & more.
M05 · FOUNDATIONS
↗
Loss Functions
The number training shrinks. MSE vs MAE vs Huber; cross-entropy vs focal. Drag the error, watch the penalty.
M06 · FOUNDATIONS
↗
Optimizers
SGD, Momentum, Adam & friends race down bowls, ravines and Rosenbrock. See who reaches the bottom first.
M07 · FOUNDATIONS
↗
Regularization
Stop a model memorizing. Live overfitting demo, L1 vs L2 geometry, dropout, and the full toolbox.
M08 · FOUNDATIONS
↗
The MLP · step-by-step
One full training step with every number shown: forward, loss, backprop chain rule, weight update. The atom of deep learning.
M09 · ARCHITECTURES
↗
CNN Architecture Builder
Drag layers in, watch tensor shapes propagate. Compare your design against ResNet, VGG, MobileNet.
M10 · ARCHITECTURES
↗
Attention & Transformers
From RNNs to Q/K/V to ViT. The full block anatomy, then hover patches to watch them attend.
M11 · ARCHITECTURES
↗
CLIP & OpenCLIP
Two encoders, one space. Watch the contrastive matrix train, then classify zero-shot over six classes.
M12 · ARCHITECTURES
↗
DINO · Self-Supervised
No labels. Student matches teacher across crops — and attention maps segment objects on their own.
M13 · ARCHITECTURES
↗
GANs
A forger and a detective in a duel. A real 2D adversarial game — train it live, watch mode collapse.
M14 · LABORATORY
↗
OpenCV Lab
Threshold, contour, morph. The classical CV toolbox as one big set of sliders.
M15 · LABORATORY
↗
Augmentation Lab
Flips, jitters, cutout, mixup. Build an augmentation pipeline and preview a batch.
M16 · LABORATORY
↗
Training Simulator
Watch loss curves descend, gradients propagate, decision boundaries form. Tune LR, optimizer, epochs.
M17 · LABORATORY
↗
Training MLP
Watch a network learn neuron by neuron — live weights, activations, gradient pulses and a forming boundary.
M18 · LABORATORY
↗
Representation Learning
The engine under CLIP & DINO, with normal backbones. Contrastive, triplet, emergent clusters.
M19 · LABORATORY
↗
Embeddings & Latents
Fly through 3D latent space. Cluster, interpolate, find nearest neighbors. PCA / t-SNE / UMAP.
M20 · LABORATORY · FLAGSHIP
↗
AI Sandbox · node editor
Chain everything. A visual node graph where the output of any module becomes the input of any other. Build pipelines that ingest an image, push it through edges → features → attention → embedding, and visualize every intermediate tensor.
// 02
How it works
01
Pick a concept.
Pick any module. Each one stands alone — start anywhere.
02
Manipulate the inputs.
Drag sliders, modify matrices, add layers, swap activations. The visualization recomputes on every frame.
03
Read the math.
Equations live alongside every visualization. Toggle them on/off, hover for derivations.
04
Chain it together in the Sandbox.
When you're ready, drop modules onto a canvas and connect them. Build a real CV pipeline.
// 03
What's inside
SYSTEM MANIFEST
20 / 20 MODULES
| FOUNDATIONS | 8 modules |
| ↳ matrix.ops | 12 demos |
| ↳ convolution.live | 8 demos |
| ↳ feature.hierarchy | 5 demos |
| ↳ activation.plot | 9 demos |
| ↳ loss.plot | 8 demos |
| ↳ optimizer.race | 6 demos |
| ↳ regularization | 7 demos |
| ↳ mlp.trace | 8 steps |
| ARCHITECTURES | 5 modules |
| ↳ cnn.builder | 9 demos |
| ↳ attention.map | 6 demos |
| ↳ clip.contrastive | 5 demos |
| ↳ dino.selfsup | 5 demos |
| ↳ gan.adversarial | 6 demos |
| LABORATORY | 7 modules |
| ↳ opencv.toolbox | 11 demos |
| ↳ augmentation.pipe | 7 demos |
| ↳ training.sim | 6 demos |
| ↳ training.mlp | live |
| ↳ representation.lab | 4 demos |
| ↳ latent.space | 5 demos |
| ↳ sandbox.graph | ∞ demos |
For students, not consumers. No paywalls, no accounts, no telemetry. Every page is one HTML file. View source, fork it, break it.
CORTEX.LAB · CV INTERACTIVE
BUILD 0.4.1 · COMMIT a3f721c · 16 MAY 2026
WEBGL 2.0
CANVAS 2D
TYPED ARRAYS
OFFSCREEN.CANVAS
100% LOCAL