Monitoring of bread cooling by statistical analysis of laser speckle patterns

Tanya Lyubenova; Elena Stoykova; Elena Nacheva; Branimir Ivanov; Ivan Panchev; Ventseslav Sainov

doi:10.1117/12.2013667

15 March 2013 Monitoring of bread cooling by statistical analysis of laser speckle patterns

Tanya Lyubenova, Elena Stoykova, Elena Nacheva, Branimir Ivanov, Ivan Panchev, Ventseslav Sainov

Proceedings Volume 8770, 17th International School on Quantum Electronics: Laser Physics and Applications; 87700S (2013) https://doi.org/10.1117/12.2013667
Event: Seventeenth International School on Quantum Electronics: Laser Physics and Applications, 2012, Nessebar, Bulgaria

Abstract

The phenomenon of laser speckle can be used for detection and visualization of physical or biological activity in various objects (e.g. fruits, seeds, coatings) through statistical description of speckle dynamics. The paper presents the results of non-destructive monitoring of bread cooling by co-occurrence matrix and temporal structure function analysis of speckle patterns which have been recorded continuously within a few days. In total, 72960 and 39680 images were recorded and processed for two similar bread samples respectively. The experiments proved the expected steep decrease of activity related to the processes in the bread samples during the first several hours and revealed its oscillating character within the next few days. Characterization of activity over the bread sample surface was also obtained.

Citation Download Citation

Tanya Lyubenova, Elena Stoykova, Elena Nacheva, Branimir Ivanov, Ivan Panchev, and Ventseslav Sainov "Monitoring of bread cooling by statistical analysis of laser speckle patterns", Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 87700S (15 March 2013); https://doi.org/10.1117/12.2013667

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