Flexible Interactive Guided Image Matting

Interactive Image Matting using Optimization

In this paper, we formulate interactive image matting as a constrained optimization problem. We first make some simple and reasonable assumptions about the alpha matte and assume that, geometrically, the closer two pixels are, the more likely they will have similar alpha values, conversely, the farther apart two pixels are, the more likely they will have different alpha values; photometrically,...

Interactive Visualization for Image Guided Medialization Laryngoplasty

Surgical procedures require the physician to use preoperative and intra-operative information for deciding the optimal course of action to be taken on the patient. Medical visualization techniques are used to ‘guide’ the surgeon during the procedure to improve accuracy. We are presenting a visualization approach for image guided medialization laryngoplasty. A brief background is provided to des...

Random Walks for Interactive Alpha-matting

Interactive, efficient, methods of foreground extraction and alpha-matting are of increasing practical importance for digital image editing. Although several new approaches to this problem have recently been developed, many challenges remain. We propose a new technique based on random walks that has the following advantages: First, by leveraging a recent technique from manifold learning theory,...

Safety of Interactive Image-Guided Surgery

Grayscale Image Matting and Colorization

This paper presents a novel approach to grayscale image matting and colorization. The first part of this approach is an efficient grayscale image matting algorithm in Bayesian framework. The foreground and background color distributions, and the alpha’s distribution are modelled with spatially varying sets of Gaussians. The major novelties of this matting algorithm are the introduction of alpha...