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Low-rank Modeling and its Applications in Medical Image Analysis
Low-rank Modeling and its Applications in Medical Image
Analysis
Xiaowei Zhou and Weichuan Yu?
The Hong Kong University of Science and Technology, Hong Kong SAR, China
ABSTRACT
Computer-aided medical image analysis has been widely used in clinics to facilitate objective disease diagnosis.
This facilitation, however, is often qualitative instead of quantitative due to the analysis challenges associated
with medical images such as low signal-to-noise ratio, signal dropout, and large variations. Consequently, physi-
cians have to rely on their personal experiences to make diagnostic decisions, which in turn is expertise-dependent
and prone to individual bias.
Recently, low-rank modeling based approaches have achieved great success in natural image analysis. There
is a trend that low-rank modeling will find its applications in medical image analysis. In this review paper,
we like to review the recent progresses along this direction. Concretely, we will first explain the mathematical
background of low-rank modeling, categorize existing low-rank modeling approaches and their applications in
natural image analysis. After that, we will illustrate some application examples of using low-rank modeling in
medical image analysis. Finally, we will discuss some possibilities of developing more robust analysis methods
to better analyze cardiac images.
Keywords: Review, low-rank, computer vision, medical image analysis
1. INTRODUCTION
In many areas of image analysis, the latent structure underlying image data is assumed to be a low-dimensional
subspace. Multiple vectorized images will form a low-rank matrix. Specific examples include background images
under different illuminations, dynamic textures with periodicity, a group of similar shapes, and 3-D trajectories
of feature points on a rigid object. Therefore, relevant tools such as principal component analysis have been
widely used in various problems to explore the low-rank structure of data. In early literatures, the low-rank
pro
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