non-photorealistic rendering (npr)people.uncw.edu/.../pdfs/micro-npr.pdf · non-photorealistic...

Non-Photorealistic Rendering (NPR)

1. NPR and Computer Graphics (CG)

2. What is NPR?

2013/5/3 1

2013/5/3 2

Computer Graphics

Photorealism

Can You Draw A Fish?

2013/5/3 3

2013/5/3 4

Non-Photorealistic Rendering (NPR)

2013/5/3 5

Escaping Criticism (1874) by Pere Borrell de Caso

Portrait of Dr. Gachet (1890) by Vincent van Gogh

By Barbara Keith

By an Flickr.com artist

CG and NPR

2013/5/3 6

Questions

• Which graph is correct?

• Which is more difficult in implementation?

2013/5/3 7

CG NPR A

CG NPR B

CG NPR

C

Three Research Categories

• Artistic media – Watercolor – Pencil – Oil painting

• Software tools – Tools like Photoshop, Corel, GIMP…

• Artistic styles

2013/5/3 8

Topics Covered

2013/5/3 9

Oil Painting

Stippling

Engraving

Illustration

Watercolor Painterly

Cartoon

Where to start?

2013/5/3 10

3D Models or Volume Data Videos

Images Sketching From scratch

Resources • Books

– Non-Photorealistic Rendering (2001) by Gooch & Gooch. A.K. Peters Ltd, Publishers

– Non-Photorealistic Computer Graphics: Modeling, Rendering, and Animation (2002) by Thomas Strothotte and Stefan Schlechtweg. Morgan Kaufmann Publishers

– The Algorithms and Principles of Non-photorealistic Graphics: Artistic Rendering and Cartoon Animation by Weidong Geng. Springer; 1st Edition. edition, 2008.

• Useful links – http://www.red3d.com/cwr/npr/ – http://www.cs.utah.edu/npr/

• Conferences – Computational Aesthetics – Sketch-based Interfaces and Modeling – Non-Photorealistic Animation and Rendering

2013/5/3 11