Measurement of stem content for control purposes in a green leaf threshing plant

Bruce T. Thompson

doi:10.1117/12.456065

14 February 2002 Measurement of stem content for control purposes in a green leaf threshing plant

Bruce T. Thompson

Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456065
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

Abstract

The purpose of a green leaf threshing (GLT) plant is to separate the tobacco leaf from the stem. In the GLT process, there are over a dozen parameters to adjust for optimal performance. The current laboratory measurement technique is destructive, laborious and not as well suited for optimizing processing parameters as an on-line technique. A machine vision technique was developed to non-destructively measure the amount of stem in the stream of processed tobacco leaf. The machine vision technique employs novel lighting to collect images and image processing to measure the amount of stem in the image. The image processing combines fuzzy logic and unique morphological image processing to extract the leaf from the background and then the stem present in the leaf. Performance of the optical technique compared favorably with the lab method. Correlation coefficient (R²) was greater than 0.95 and relative error (%RSD) was less than 6%.

Citation Download Citation

Bruce T. Thompson "Measurement of stem content for control purposes in a green leaf threshing plant", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); https://doi.org/10.1117/12.456065

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