The development of an 'on-belt tomosynthesis' system for cost-effective (3D) baggage screening

Kolokytha, Selina; Speller, Robert; Robson, Stuart

doi:10.1117/12.2022456

Cited by 3 publications

(6 citation statements)

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“…The calculation results in Table 6 allow the quantification of these eye-made observations. The mean darkness percentage value (%Bl) calculated is 99.87% (Kolokytha et al, 2013). All these values are very near 100%, showing that the 'resulting images' are very almost black.…”

Section: Resultsmentioning

confidence: 90%

“…M i is the mean greyscale of the original reconstructed image, M r is the mean greyscale of the respective resulting image, %Bl is the percentage of "how black" an image is, and %D is the percentage of how much darker the resulting image is than the original. Figure adapted from Kolokytha et al (2013).…”

Section: Resultsmentioning

confidence: 99%

“…Correlation on the phantom position and orientation measurements between the manually measured values and the photogrammetrically computed values shows their differences to be insignificant. In addition, measurements showed the discrepancies between the photogrammertically-resulting reconstructed images and the manually-resulting reconstructed images to be very small, of the average order of 0.13% (Kolokytha et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…These studies have been made on static objects, in geometries representing the ObT. In determining the quality of the photogrammetric implementation to the ObT image reconstruction, Kolokytha et al (2013) compared two sets of reconstructed images; one set produced using photogrammetrically computed measurements for the phantom position and orientation and the other using manually calculated measurements, which are taken as the 'gold standard'. The comparison is done via developing an algorithm, which subtracts the respective photogrammetrically-resulting images from the manually-resulting ones, in order to check for inconsistencies.…”

Section: Photogrammetric Implementationmentioning

confidence: 99%

“…Here, the resulting images have been converted to RGB in order to enhance the brightness of the details. Figure adapted from Kolokytha et al (2013).…”

Section: Photogrammetric Implementationmentioning

confidence: 99%

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Three-dimensional imaging of hold baggage for airport security

Kolokytha¹,

Speller

Robson³

2014

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:This study describes a cost-effective check-in baggage screening system, based on 'on-belt tomosynthesis' (ObT) and close-range photogrammetry, that is designed to address the limitations of the most common system used, conventional projection radiography. The latter's limitations can lead to loss of information and an increase in baggage handling time, as baggage is manually searched or screened with more advanced systems. This project proposes a system that overcomes such limitations creating a cost-effective automated pseudo-3D imaging system, by combining x-ray and optical imaging to form digital tomograms. Tomographic reconstruction requires a knowledge of the change in geometry between multiple x-ray views of a common object. This is uniquely achieved using a close range photogrammetric system based on a small network of web-cameras. This paper presents the recent developments of the ObT system and describes recent findings of the photogrammetric system implementation. Based on these positive results, future work on the advancement of the ObT system as a cost-effective pseudo-3D imaging of hold baggage for airport security is proposed.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Photogrammetric Implementationmentioning

confidence: 99%

“…Here, the resulting images have been converted to RGB in order to enhance the brightness of the details. Figure adapted from Kolokytha et al (2013).…”

Section: Photogrammetric Implementationmentioning

confidence: 99%

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