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arXiv 1607.02547cs.CV
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基于鲁棒回归和稀疏分解的屏幕内容图像分割

Screen Content Image Segmentation Using Robust Regression and Sparse Decomposition

Shervin Minaee, Yao Wang

摘要:

本文考虑如何从屏幕内容和混合文档图像中的平滑背景中分离文本和/或图形,并提出了两种方法来执行此分割任务。所提出的方法利用这样的事实,即在每个块中的背景通常是平滑变化的,可以很好地建模由几个平滑变化的基函数的线性组合,而前景的文本和图形创建尖锐的不连续性。该算法通过尝试使用两种不同的方案将块中的背景像素值拟合到平滑函数中来分离背景和前景像素。一种是基于鲁棒回归,其中内点像素将被视为背景,而剩余的离群点像素将被视为前景。第二种方法使用稀疏分解框架,其中背景和前景层分别用平滑和稀疏分量建模。这些算法已经在从用于屏幕内容编码的HEVC标准测试序列中提取的图像上进行了测试,并且显示出比以前的方法具有更优越的性能。所提出的方法可以用于不同的应用,如文本提取,单独的编码的背景和前景的屏幕内容的压缩,和医学图像分割。

英文摘要:

This paper considers how to separate text and/or graphics from smooth background in screen content and mixed document images and proposes two approaches to perform this segmentation task. The proposed methods make use of the fact that the background in each block is usually smoothly varying and can be modeled well by a linear combination of a few smoothly varying basis functions, while the foreground text and graphics create sharp discontinuity. The algorithms separate the background and foreground pixels by trying to fit background pixel values in the block into a smooth function using two different schemes. One is based on robust regression, where the inlier pixels will be considered as background, while remaining outlier pixels will be considered foreground. The second approach uses a sparse decomposition framework where the background and foreground layers are modeled with a smooth and sparse components respectively. These algorithms have been tested on images extracted from HEVC standard test sequences for screen content coding, and are shown to have superior performance over previous approaches. The proposed methods can be used in different applications such as text extraction, separate coding of background and foreground for compression of screen content, and medical image segmentation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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