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Original source1 min read

Quick Study

Summary

Simon Willison released Quick Study, a browser tool that uses a canvas element and simulated paintbrush to rapidly repaint an uploaded photo in a painterly style. The artifact was built with Claude Opus 5.5 High from a single prompt and uses Sobel edge detection with no external libraries beyond Google Fonts.

Quick Study
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Tool: Quick Study

Simon Willison’s Weblog

Newsletter

23rd October 2026

Tool

Quick Study

Prompt to Claude Opus 5.5 High:

Build an artifact where you open a photo and it rapidly (in a few seconds) paints a version of that photo using a canvas element and simulated paintbrush

See also my previous experiment getting Claude Fable to simulate a watercolor illustration with P5.js.

Quick Study uses Sobel edge detection, with no external libraries beyond Google Fonts.

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Key points and analysis

Article intelligence

EngineersBeginner

Key points

  • Quick Study repaints photos in a simulated painting style within seconds.
  • It uses canvas and a simulated paintbrush, with Sobel edge detection.
  • The tool was built by Claude Opus 5.5 High from a single prompt.
  • It follows Willison's earlier Claude Fable and P5.js watercolor experiment.

Highlights and analysis are generated automatically and may contain errors. Check the original source.