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Open AccessArticle

A Smooth Transition Algorithm for Adjacent Panoramic Viewpoints Using Matched Delaunay Triangular Patches

School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430072, China
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Author to whom correspondence should be addressed.
Current address: Beijing Momenta Technology Co., Ltd., Beijing 100089, China.
ISPRS Int. J. Geo-Inf. 2020, 9(10), 596; https://doi.org/10.3390/ijgi9100596
Received: 21 September 2020 / Revised: 7 October 2020 / Accepted: 9 October 2020 / Published: 10 October 2020
(This article belongs to the Special Issue Measuring, Mapping, Modeling, and Visualization of Cities)
The unnatural panoramic image transition between two adjacent viewpoints reduces the immersion and interactive experiences of 360° panoramic walkthrough systems. In this paper, a dynamic panoramic image rendering and smooth transition algorithm for adjacent viewpoints is proposed. First, the feature points of adjacent view images are extracted, a robust matching algorithm is used to establish adjacent point pairs, and the matching triangles are formed by using the homonymous points. Then, a dynamic transition model is formed by the simultaneous linear transitions of shape and texture for each control triangle. Finally, the smooth transition between adjacent viewpoints is implemented by overlaying the dynamic transition model with the 360° panoramic walkthrough scene. Experimental results show that this method has obvious advantages in visual representation with distinct visual movement. It can realize the smooth transition between two indoor panoramic stations with arbitrary station spacing, and its execution efficiency is up to 50 frames per second. It effectively enhances the interactivity and immersion of 360° panoramic walkthrough systems. View Full-Text
Keywords: panoramic image; scene transition; mesh morph; image-based rendering; texture shade panoramic image; scene transition; mesh morph; image-based rendering; texture shade
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Zhao, P.; Hu, Q.; Tang, Z.; Ai, M. A Smooth Transition Algorithm for Adjacent Panoramic Viewpoints Using Matched Delaunay Triangular Patches. ISPRS Int. J. Geo-Inf. 2020, 9, 596.

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