Real-time Industrial Visual Inspection: A Review

Thomas, Andrew D.; Rodd, M.G.; Holt, Jon; Neill, C. J.

doi:10.1006/rtim.1995.1014

Cited by 59 publications

(16 citation statements)

References 0 publications

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“…Many industrial inspection tasks such as textile [13], printed circuit boards (PCBs) [17], ball grid arrays (BGA) [20], passive components [19], electric components [8], wire bonding for Integrated Circuits (IC) [9,18], machine tools [5] and profile matching for machined parts [1], have used machine vision inspection to improve productivity and quality management [10,11,15]. In order to achieve high efficiency and effectiveness in production, the development of automated visual inspection systems is essential.…”

Section: Introductionmentioning

confidence: 99%

Using Eigenvalues of Covariance Matrices for Automated Visual Inspection of Microdrills

Tien

Yeh

2005

Int J Adv Manuf Technol

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This paper proposes a translation, rotation, and template-free automated visual inspection scheme that detects microdrill defects using the eigenvalues of covariance matrices. We first derived the colour images of microdrills and extracted the boundary of the first facets. Then, the smaller eigenvalues of the covariance matrices of given regions of support were calculated for boundary representation, and they were thresholded to separate the boundaries into segments. The least square linear regression method was used to fit the segments into linear equations. Eventually, the defects were detected by three inspection rules that measure five features of microdrills including: gap distance, parallel, and enclosed angles, accordingly. The proposed scheme was implemented in C++ with a graphical user interface environment. Fifteen microdrills, digitized without alignment, were used to verify the proposed inspection process. Experimental results show that the proposed scheme reliably achieves the inspection of microdrills.

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Section: Introductionmentioning

confidence: 99%

Using Eigenvalues of Covariance Matrices for Automated Visual Inspection of Microdrills

Tien

Yeh

2005

Int J Adv Manuf Technol

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“…they are concerned largely with the logical ordering of processes. Thomas et al [6] have discussed several methods that claim to specify the real-time systems completely, and introduce the Qmodel, which appears promising in the full speci®cation and analysis of real-time systems.…”

Section: Tools For Real-time Analysismentioning

confidence: 99%

Real-time Analysis of an IC Wire-bonding Inspection System

Rajeswari¹,

Rodd

1999

Real-Time Imaging

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“…The capturing hardware used in the commercially available systems are very expensive and complex. Tracking features (in our case anatomical land marks) in real-time is very dicult [32,33]. Additionally the tracking is highly dependent of the quality of the captured gaits.…”

Section: System Descriptionmentioning

confidence: 99%