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A digital assistant for shading paper sketches.

Amal Dev Parakkat^1,2, Hari Hara Gowtham³, Sarang Joshi³

¹Indian Institute of Technology Madras, Chennai, 600036, India. adp.upasana@gmail.com.

Visual Computing for Industry, Biomedicine, and Art

|June 9, 2020

Summary

This study introduces a mixed reality system to help novice artists shade paper sketches. The assistive technology guides users through the shading process, resulting in impressive artistic outputs.

Keywords:

Delaunay triangulation Digital art Iso-contours Mixed reality Paper sketch Shading

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Area of Science:

Computer Graphics
Human-Computer Interaction
Digital Art

Background:

Traditional art shading requires skill and practice.
Digital tools can assist in artistic creation but often lack intuitive interfaces for beginners.
Mixed reality (MR) offers immersive and interactive possibilities for creative tasks.

Purpose of the Study:

To develop and evaluate a mixed reality-based assistive system for shading paper sketches.
To enable inexperienced users to achieve appropriate and artistic shading on their drawings.
To provide a flexible and interactive user experience for simulating lighting and depth.

Main Methods:

A Delaunay-triangulation based inflation algorithm computes an approximate depth map from a 2D sketch.
A 2.5D inflated model is rendered to highlight areas for shading.
A mixed reality system projects these highlighted areas back onto the user's sketch.
Users smudge the projected hints to apply artistic shading, with adjustable parameters for light and height.

Main Results:

The system successfully aids novice users in shading paper sketches.
Users can achieve impressive shading results with the assistance provided.
The interactive nature of the mixed reality interface enhances the user's shading experience.

Conclusions:

The proposed mixed reality system is effective in assisting inexperienced users with sketch shading.
This approach lowers the barrier to entry for artistic shading techniques.
Mixed reality technology holds significant potential for creative assistance in digital art and design.