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清华大学 [1]
长春光学精密机械与物... [1]
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颅脑MRI图像的分水岭分割方法研究
期刊论文
2010, 2010
柴黎
;
王明泉
;
CHAI Li
;
WANG Ming-Quan
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浏览/下载:5/0
A new segmentation method of CR images based on discrete wavelet transform and mathematics morphology (EI CONFERENCE)
会议论文
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Li Z.
;
Huang L.-Q.
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提交时间:2013/03/25
In this paper
we propose a segmentation method of CR(computed radiography) images with being rid of under-segmentation and over-segmentation. An under-segmentation occurs when pixels belonging to different objects are grouped into a single region. Such errors are the most dangerous because they can invalidate the whole segmentation process. The phenomenon always takes place when we segment CR images because of the principle of CR. In order to depressed under-segmentation
we enhance the CR images using DWT (discrete wavelet transform) to get more detail of CR image features. As we enhance the CR image
the over-segmentation maybe occurs. Compared with under-segmentation
the over-segmentation occurs when a single objects is subdivided by segmentation into several region. For the purpose of preventing from the over-segmentation
we present a scheme for enhanced CR images based on watershed algorithm that solves over-segmentation problem. We use marker-based watershed algorithm. Together with gradient image and marker image
watershed segmentation can make sure to partition CR image into meaningful object and avoid further segmentation of homogeneous regions. The result of the proposed algorithm are compared with those of other standard methods. Experiments have shown a better result and indeed solved under-segmentation and over-segmentation problems.
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