The creation of a painting, in the physical world or digitally, is a process that occurs over time. Later strokes cover earlier strokes, and strokes painted at a similar time are likely to be part of the same object. In the final painting, this temporal history is lost, and a static arrangement of color is all that remains. The rich literature for… (More)
In digital image editing software, layers organize images. However, layers are often not explicitly represented in the final image, and may never have existed for a scanned physical painting or a photograph. We propose a technique to decompose an image into layers. In our decomposition, each layer represents a single-color coat of paint applied with varying… (More)
Publications Lien's advisees indicated by: graduate (‡), undergraduates (†) students and interns () Special edition of [P65] featuring selected papers. Listed by CAGD as one of the most cited paper since 2007.
My research interests are image & video processing, computer graphics, and computer vision. Currently, I am focusing on decomposing images or time-lapse painting videos into translucent layers, to make image reediting much easier. More generally, I am interested in the application of geometry of color spaces and image edits. Given an image, either… (More)
1 2 3 4 5 composite RGB space original recoloring Figure 1: Given a digital painting, we analyze the geometry of its pixels in RGB-space, resulting in a translucent layer decomposition, which makes difficult edits simple to perform. Artwork c Adelle Chudleigh. Abstract In digital painting software, layers organize paintings. However, layers are not… (More)