Residual stresses significantly influence the strength and lifetime of the glass products,
therefore their qualification and quantification during production is basically important
for evaluating their probable reliability in application. The current paper aims at
introducing a novel procedure of the suggested automatic glass quality test based
on instrumented scratch test completed with computer aided image analysis. A special
emphasis is put on the problem of limited reproducibility and reliability of the image
processing, arisen in the first stage of the research work. The latest results consisting
in the development of a new algorithm, providing a more reliable evaluation of the
test data will be described.
