Vision science, shader engineering, and the space between. https://andyed.github.io/scrutinizer-www/blog/ 2026-04-23T15:05:05.192Z Andy Edmonds https://andyed.github.io/scrutinizer-www/img/icon-192.png https://andyed.github.io/scrutinizer-www/blog/2026-03-21-v2.6.html 2026-03-21T12:00:00Z 2026-03-21T12:00:00Z Andy Edmonds

Scrutinizer v2.6: FOVI-derived isotropic cortical sampling. Sector geometry drives displacement rate — seven failed rendering attempts, the key insight, and what shipped.

https://andyed.github.io/scrutinizer-www/blog/2026-03-16-color-sprint.html 2026-03-16T12:00:00Z 2026-03-16T12:00:00Z Andy Edmonds

Scrutinizer v2.5 color sprint: 12-band DoG decomposition, swatch-aware chromatic preservation, and a biological desaturation ramp. Validated against Bowers 2025, Hansen 2009, and Mullen & Kingdom 2002.

https://andyed.github.io/scrutinizer-www/blog/2026-03-13-reading-span.html 2026-03-13T12:00:00Z 2026-03-13T12:00:00Z Andy Edmonds

Scrutinizer v2.4.0 models Rayner's asymmetric perceptual span — shifting the foveal protection zone in the reading direction during horizontal pursuit over text. Plus: a fovea calibration fix and what it revealed about validation independence.

https://andyed.github.io/scrutinizer-www/blog/2026-03-11-luminance-metrics.html 2026-03-11T12:00:00Z 2026-03-11T12:00:00Z Andy Edmonds

Scrutinizer v2.3.0 replaces MIP blur with a WebGPU compute pipeline for real-time metamer texture synthesis — catching up from 1970s acuity models to the Texture Tiling Model. Two WGSL passes, ~900 lines, under 0.3ms on integrated graphics.

https://andyed.github.io/scrutinizer-www/blog/2026-03-09-v2.2.html 2026-03-09T12:00:00Z 2026-03-09T12:00:00Z Andy Edmonds

Scrutinizer 2.2: Orientation-selective peripheral blur. Cardinal edges survive further than diagonal ones — matching the oblique effect, V1 simple cell tuning, and radial-tangential crowding asymmetry.

https://andyed.github.io/scrutinizer-www/blog/2026-03-08-v2.1.html 2026-03-08T12:00:00Z 2026-03-08T12:00:00Z Andy Edmonds

Scrutinizer 2.1: Five-wave psychophysical validation, 8 half-octave DoG bands, Halverson mixed-density crowding, shader fixes found by measurement.

https://andyed.github.io/scrutinizer-www/blog/2026-03-07-v2.0.html 2026-03-07T12:00:00Z 2026-03-07T12:00:00Z Andy Edmonds

Scrutinizer 2.0: Minecraft and Eyeball modes render the CMF pipeline as visible geometry. Density-gated crowding, Bowers 2025 chromatic recalibration, Blueprint wireframes from live ARIA.

https://andyed.github.io/scrutinizer-www/blog/2026-03-04-v1.9.html 2026-03-04T12:00:00Z 2026-03-04T12:00:00Z Andy Edmonds

Per-channel chromatic pooling replaces uniform desaturation with biologically accurate RG/YV decay. Large colored regions preserve hue into the periphery; small features lose chromatic identity. Plus: congestion-gated pooling, crowding diagnostics, and a headless audit CLI.

https://andyed.github.io/scrutinizer-www/blog/2026-03-03-v1.8.html 2026-03-03T12:00:00Z 2026-03-03T12:00:00Z Andy Edmonds

Scrutinizer v1.8 tightens the biology — linear M-scaling replaces geometric cutoffs — and ships Feature Congestion (Rosenholtz 2007) as a real-time visual clutter metric.

https://andyed.github.io/scrutinizer-www/blog/congestion-score.html 2026-03-01T12:00:00Z 2026-03-01T12:00:00Z Andy Edmonds

Running Rosenholtz's Feature Congestion on live web pages — in the desktop app, from the command line, or via MCP for AI-assisted design review. The fixed-σ discovery, saliency vs. congestion, and validation at ρ=0.93.

https://andyed.github.io/scrutinizer-www/blog/mip-chain-explainer.html 2026-03-01T12:00:00Z 2026-03-01T12:00:00Z Andy Edmonds

Interactive explainer: how Scrutinizer exploits GPU MIP chains for peripheral vision simulation via DoG band decomposition and eccentricity-based level selection.

https://andyed.github.io/scrutinizer-www/blog/color-search.html 2026-03-01T12:00:00Z 2026-03-01T12:00:00Z Andy Edmonds

Proposed perceptual evaluation methodology for peripheral color desaturation transfer functions in foveated rendering. Dual-sigma Oklab model vs smoothstep.

https://andyed.github.io/scrutinizer-www/blog/2026-02-28-fovi.html 2026-02-28T12:00:00Z 2026-02-28T12:00:00Z Andy Edmonds https://andyed.github.io/scrutinizer-www/blog/2026-01-30-v1.5.html 2026-01-30T12:00:00Z 2026-01-30T12:00:00Z Andy Edmonds

Scrutinizer v1.5 ships mobile emulation with device profiles, touch simulation, and citation-ready image exports for academic reproducibility.

https://andyed.github.io/scrutinizer-www/blog/2025-12-13-v1.4.html 2025-12-13T12:00:00Z 2025-12-13T12:00:00Z Andy Edmonds

Scrutinizer v1.4 replaces Gaussian blur with hardware MIP-map pooling for biologically accurate peripheral rendering, migrates saliency to Oklab color space, and adds Inhibition of Return.