TECHNICAL CASE / CANVAS API
Image annotation
Interactive image annotation with scale and coordinates in mind.
Image region selection tool: Canvas API, coordinates, and scaling.
01 /CONTEXT AND TASK
Precise annotation
Allow users to mark regions directly on an image.
Visual coordinates change with scale. User actions must stay aligned with the source image coordinates.
02 /IMPLEMENTATION
Key solutions
Engineering tasks for an interactive graphics interface.
- 01
Region annotation
Interactive image region selection with the Canvas API.
- 02
Coordinates and scaling
Transforms coordinates between the source image and its on-screen representation.
- 03
Component implementation
Interface logic built with React and TypeScript.
03 /MY CONTRIBUTION
Area of responsibility
Built the client logic for a graphics editor.
Implemented image region interaction, coordinate handling, and scaling with React, TypeScript, and the Canvas API.
04 / TECHNOLOGY
Under the hood
- React
- TypeScript
- Canvas API
Image annotation is a technical case at the intersection of interfaces and computer graphics.