Computerized Scanning Densitometer For Automatic Recording Of Tree-Ring Width And Density Data From X-Ray Negatives

M. L. Parker, J. Schoorlemmer, L. J. Carver


A scanning densitometer has been developed to produce tree-ring width and density data as digital output and graphic plots. The densitometer is part of a data acquisition system that includes an on-line digital computer. X-ray negatives of wood samples are scanned and intra-ring specific gravity is measured at 0.01-mm intervals. Ring boundaries are automatically recorded; and values such as earlywood width, latewood width, minimum ring density, maximum ring density, average latewood density, total ring density and total sample density are produced.


X-ray densitometry;dendrochronology;wood density;specific gravity;annual growth increments;computer processing

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