Sketch-to-Image Converter

Build an application where users draw rough sketches on a canvas and AI transforms them into polished, realistic or stylized images. Include a drawing toolbar, color picker, and multiple output style options.

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canvasimage-generationcontrolnetsketch-to-image

Objectives

Implement a drawing canvas with brush size, color, and eraser tools
Send the sketch to an image generation API for transformation
Offer multiple output styles: realistic, cartoon, watercolor, 3D render
Display the original sketch alongside the AI-generated result
Support undo/redo functionality and canvas clearing

Hints

Use HTML Canvas or a library like Excalidraw for the drawing interface
ControlNet scribble mode works well for sketch-to-image generation
Convert the canvas to a base64 image before sending to the API

Resources

developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial
replicate.com/jagilley/controlnet-scribble

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