Abstract: Oil paintings rendering based on brushstrokes is the most import technology in oil
paintings rendering which simulates real artists’ painting process that use brushes to paint. This
paper analyzes advantages and disadvantages of oil paintings rendering based on region
brushstrokes through image segmentation, and presents a new method of oil paintings rendering
based on combining region brushstrokes with gradient brushstrokes. Firstly, render region
brushstrokes through image segmentation and then set gradient threshold through image
segmentation level and render gradient brushstrokes. Experimental results confirm that the method
has a rapid rendering speed, and not only makes brushstrokes more flexible but can fill up some
gaps rendered due to region brushstrokes.

Key words: oil painting, image segmentation, region brushstrokes, gradient brushstrokes