Stereoscopic System for 3-D Seabed Mosaic Reconstruction

A. Leone, G. Diraco, C. Distante
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引用次数: 13

Abstract

This paper presents an inexpensive framework for 3-D seabed mosaic reconstruction, based on an asynchronous stereo vision system when simplifying motion assumptions are used. In order to achieve a metric reconstruction some knowledge about the scene is recovered by a simple and reliable calibration step. The major issue in calibration come from the asynchronism that complicate the proper frames selection. To overcome this problem a stereo frames selection based on epipolar gap evaluation (EGE) is proposed. Stereo disparity maps are evaluated by using both local and global approaches. To deal with brightness constancy model violation, zero-mean normalized cross-correlation is used as similarity measure in local approach, whereas a histogram equalization is necessary in global approach in order to improve min-cut based algorithms. Experimental results validate the proposed framework, allowing to define 3-D mosaics having visual quality similar to those obtained by using specialized hardware.
三维海底镶嵌重建的立体系统
本文提出了一种廉价的基于异步立体视觉系统的海底三维拼接重建框架,简化了运动假设。为了实现度量重建,通过一个简单可靠的校准步骤恢复了一些关于场景的知识。校准中的主要问题来自于异步性,它使正确的帧选择复杂化。为了克服这一问题,提出了一种基于极间隙评价的立体帧选择方法。通过使用局部和全局方法来评估立体视差图。局部方法采用零均值归一化互相关作为相似度度量,全局方法采用直方图均衡化来改进基于最小切割的算法。实验结果验证了所提出的框架,允许定义具有类似于使用专用硬件获得的视觉质量的3d马赛克。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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