An Application Of The LILY Software Package To Defect Inspection In Unexposed Radiographic Film

P. Dewaele; P. Wambacq; A. Oosterlinck

doi:10.1117/12.951049

5 July 1989 An Application Of The LILY Software Package To Defect Inspection In Unexposed Radiographic Film

P. Dewaele, P. Wambacq, A. Oosterlinck

Proceedings Volume 1038, 6th Mtg in Israel on Optical Engineering; (1989) https://doi.org/10.1117/12.951049
Event: Sixth Meeting of Optical Engineering in Israel, 1988, Tel Aviv, Israel

Abstract

The results of three visual inspection techniques, using laser light, for defect detection in unexposed radiographic film are presented and compared. First convolution techniques are discussed. An appropriate choice of mask coefficients is explained and the mask dimension has to be matched with the scale at which the errors occur. Second an error detection method using polynomial regression was experienced to be very effective. Finally, fourier filtering can equally well be applied but it was computationally more expensive than the convolution method for this type of inspection. Experiments have been carried out using the LILY software package for image processing.

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P. Dewaele, P. Wambacq, and A. Oosterlinck "An Application Of The LILY Software Package To Defect Inspection In Unexposed Radiographic Film", Proc. SPIE 1038, 6th Mtg in Israel on Optical Engineering, (5 July 1989); https://doi.org/10.1117/12.951049

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KEYWORDS

Convolution

Linear filtering

Smoothing

Inspection

Optical engineering

Optical filters

Coating

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