A robust close-range photogrammetric target extraction algorithm for size and type variant targets

Kofi Nyarko; Clayton Thomas Jr.; Gilbert Torres

doi:10.1117/12.2221918

12 May 2016 A robust close-range photogrammetric target extraction algorithm for size and type variant targets

Kofi Nyarko, Clayton Thomas Jr., Gilbert Torres

Proceedings Volume 9844, Automatic Target Recognition XXVI; 984403 (2016) https://doi.org/10.1117/12.2221918
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

The Photo-G program conducted by Naval Air Systems Command at the Atlantic Test Range in Patuxent River, Maryland, uses photogrammetric analysis of large amounts of real-world imagery to characterize the motion of objects in a 3-D scene. Current approaches involve several independent processes including target acquisition, target identification, 2-D tracking of image features, and 3-D kinematic state estimation. Each process has its own inherent complications and corresponding degrees of both human intervention and computational complexity. One approach being explored for automated target acquisition relies on exploiting the pixel intensity distributions of photogrammetric targets, which tend to be patterns with bimodal intensity distributions. The bimodal distribution partitioning algorithm utilizes this distribution to automatically deconstruct a video frame into regions of interest (ROI) that are merged and expanded to target boundaries, from which ROI centroids are extracted to mark target acquisition points. This process has proved to be scale, position and orientation invariant, as well as fairly insensitive to global uniform intensity disparities.

Citation Download Citation

Kofi Nyarko, Clayton Thomas Jr., and Gilbert Torres "A robust close-range photogrammetric target extraction algorithm for size and type variant targets", Proc. SPIE 9844, Automatic Target Recognition XXVI, 984403 (12 May 2016); https://doi.org/10.1117/12.2221918

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KEYWORDS

Target detection

Target acquisition

Detection and tracking algorithms

Image segmentation

Video

3D acquisition

3D image processing

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