&lt;title&gt;Comparison of some techniques for the subpixel location of discrete target images&lt;/title&gt;

Shortis, Mark R.; Clarke, Timothy A.; Short, Tim

doi:10.1117/12.189136

Cited by 146 publications

(90 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…LIF targeting also provides enhanced capabilities for dynamic measurements since a pulsed laser (10 ns typical pulse duration) can be used to obtain simultaneous, instantaneous measurements of all illuminated target locations. This is in stark contrast to visible light dot projection, which cannot be used for dynamic measurements because of the long camera exposure times required for the cameras to collect enough diffuse scattered light to resolve the targets 7 . The same experimental setup shown in Fig.…”

Section: Dynamic Testmentioning

confidence: 98%

“…5 range from suitably exposed and Gaussian-like shaped to significantly over exposed and "flat-topped". Previous studies have shown the affect of target saturation on overall centroiding precision to be typically 0.001 inches, but somewhat dependent on the processing algorithm 7 . Intensity profiles for the diffuse yellow targets are shown in Fig.…”

Section: Target Profilesmentioning

confidence: 99%

See 1 more Smart Citation

Validation of Laser-Induced Fluorescent Photogrammetric Targets on Membrane Structures

Jones

Dorrington²,

Shortis

et al. 2004

45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics &Amp;amp; Materials Conference

View full text Add to dashboard Cite

The need for static and dynamic characterization of a new generation of inflatable space structures requires the advancement of classical metrology techniques.A new photogrammetric-based method for non-contact ranging and surface profiling has been developed at NASA Langley Research Center (LaRC) to support modal analyses and structural validation of this class of space structures. This full field measurement method, known as Laser-Induced Fluorescence (LIF) photogrammetry, has previously yielded promising experimental results. However, data indicating the achievable measurement precision had not been published. This paper provides experimental results that indicate the LIF-photogrammetry measurement precision for three different target types used on a reflective membrane structure. The target types were: (1) non-contact targets generated using LIF, (2) surface attached retro-reflective targets, and (3) surface attached diffuse targets. Results from both static and dynamic investigations are included.

show abstract

Section: Dynamic Testmentioning

confidence: 98%

Section: Target Profilesmentioning

confidence: 99%

Validation of Laser-Induced Fluorescent Photogrammetric Targets on Membrane Structures

Jones

Dorrington²,

Shortis

et al. 2004

45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics &Amp;amp; Materials Conference

View full text Add to dashboard Cite

show abstract

“…laser spot centroid algorithm [8] The finally aim of pretreatment for collected video and the image processor of dm642 is to extract the coordinate of laser spot, and the recent method includes peak location method, matching location method, central projection method and centroid location method. Where the centroid location method with the character of high location precision and a fewer calculation are adopted in this paper.…”

Section: Adaptive Threshold Segmentation Algorithmsmentioning

confidence: 99%

The Impact Point Detecting System for Photo-electricity Targets

Xu¹,

Li²,

Xiao³

2012

Proceedings of the 2012 2nd International Conference on Computer and Information Applications (ICCIA 2012)

View full text Add to dashboard Cite

Abstract-according to the requirement of shooting training, the impact point detecting system of photo-electricity target is designed based on laser coordinate orientation method. The principle of detection method based on image process is firstly discussed, then the system design and image processing arithmetic is also detailed, at last the simulation experiment is done, and the result shows that the designed system is stabilized and can reach accurate and reliable detecting and displaying for scoring ring number.

show abstract

“…The centroid is located and a number of geometric tests are applied to ensure that the blob is most probably an image of a circular target of appropriate size 7 .…”

Section: Practical Considerations and Pre-detectionmentioning

confidence: 99%

Automatic recognition of coded targets based on a Hough transform and segment matching

et al. 2003

Self Cite

View full text Add to dashboard Cite

This paper will present details of a coded target system that employs a Hough transform and segment matching to automatically recognise and identify the targets in digital images. The code system is based on a square surrounding the central circular target and will be described at a level of detail that would allow the system to be readily duplicated. Predetection processes, developed to improve the success rate under unfavourable conditions, and the tests conducted to validate a correct target match will also be described. Finally, the paper will include some examples of the use of the coded targets, drawn from calibrations of digital still cameras and underwater stereo-video systems.

show abstract

<title>Comparison of some techniques for the subpixel location of discrete target images</title>

Cited by 146 publications

References 6 publications

Validation of Laser-Induced Fluorescent Photogrammetric Targets on Membrane Structures

Validation of Laser-Induced Fluorescent Photogrammetric Targets on Membrane Structures

The Impact Point Detecting System for Photo-electricity Targets

Automatic recognition of coded targets based on a Hough transform and segment matching

Contact Info

Product

Resources

About