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Proceedings Paper

Double-threshold image segmentation method based on gray gradient
Author(s): Zhihua Fan; Chunhong Wang; Xiaoyu Ma
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Paper Abstract

For the segmentation of the dim point target and the extended target under sky background which has low resolution, an automatic thresholding method based on spatial gradient information is presented. It can separate the point target and the extended target from the background even under the strong noise condition, providing good segmentation results for the point target as well as the accurate information of the shape for the extended target. This method first marks the pixels as the background or the target using the image gray gradient roughly, then fit the grayvalue of pixels in the background area to obtain two thresholds, with which the image can be segmented according to the pixel position, and finally the morphological filter is adopted to remove the noise in the segmented image. The experiment shows that, when compared to Otsu in low resolution images with even background, our method can work more accurately and robustly.

Paper Details

Date Published: 1 December 2009
PDF: 8 pages
Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 75062O (1 December 2009); doi: 10.1117/12.839424
Show Author Affiliations
Zhihua Fan, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Graduate School of the Chinese Academy of Sciences (China)
Chunhong Wang, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Xiaoyu Ma, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Graduate School of the Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 7506:
2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments

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