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多视纹理映射中无需设定偏差的快速可见性检测

多视纹理映射中无需设定偏差的快速可见性检测

https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_chxb202001009

多视纹理映射中无需设定偏差的快速可见性检测

About this item

Full title

多视纹理映射中无需设定偏差的快速可见性检测

Publisher

Beijing: Surveying and Mapping Press

Journal title

Ce hui xue bao, 2020-01, Vol.49 (1), p.92-107

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Formats

Publication information

Publisher

Beijing: Surveying and Mapping Press

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Scope and Contents

Contents

在多视纹理映射中,Z缓冲区算法和光线追踪算法是两种主流的可见性检测算法。但其精度受限于人工设定的偏差。本文提出一种无需设定偏差的可见性检测方案。首先,根据倾斜摄影的投影参数设计了一种基于着色器编程的影像模拟算法,生成各影像视角下的初始可见性图(initial visibility map,IVM)。其中,完全不可见面元在模拟的过程中会被深度测试自动剔除。然后,基于矢量栅格化准则和像素深度对IVM中的可见面元执行投影区域优化(projection coverage refinement,PCR)。最后,提出惰性投影(lazy projection,LP)和迭代点边采样(iterative vertex-edge sampling,IVES)快速区分出IVM中的完全可见面元和非完全可见面元。利用...

Alternative Titles

Full title

多视纹理映射中无需设定偏差的快速可见性检测

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Primary Identifiers

Record Identifier

TN_cdi_wanfang_journals_chxb202001009

Permalink

https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_chxb202001009

Other Identifiers

ISSN

1001-1595

E-ISSN

1001-1595

DOI

10.11947/j.AGCS.2020.20180468

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