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Function for developing linear detection of ring borders.
● Data Source:
CranContrib
● Keywords:
● Alias: linearDetect
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0 images
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This function can detect the extremes of the smoothed gray.
● Data Source:
CranContrib
● Keywords:
● Alias: grayDarker
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0 images
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One or several plots of consecutive segments of gray matrix and smoothed grays.
● Data Source:
CranContrib
● Keywords:
● Alias: plotSegments
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0 images
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This function can compute a gray matrix from the RGB in an image section.Such image section can be compressed in either portable network graphics format (png) or tagged image file format (tif).
● Data Source:
CranContrib
● Keywords:
● Alias: imageTogray
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0 images
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This function can find the tree-ring widths in an scanned image section by visually including/excluding ring borders, or automatically detecting the rings using a linear detection algorithm.
● Data Source:
CranContrib
● Keywords:
● Alias: ringDetect
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0 images
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This function can compute the lag of the first local on the auto-correlation function (acf) of smoothed grays.
● Data Source:
CranContrib
● Keywords:
● Alias: lagIngray
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0 images
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This function can compute the ring widths from the ring borders detected on an image section.
● Data Source:
CranContrib
● Keywords:
● Alias: ringWidths
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0 images
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Averaging, detrending, and smoothing of the columns in a gray matrix.
● Data Source:
CranContrib
● Keywords:
● Alias: graySmoothed
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0 images
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This function provides tools to recursively detect the ring borders in multiple image sections.
● Data Source:
CranContrib
● Keywords:
● Alias: multiDetect
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0 images
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measuRing-package
(Package: measuRing) :
Detection and Control of Tree-Ring Widths on Scanned Image Sections
Identification of ring borders on scanned image sections from dendrochronological samples. Processesing of image reflectances to produce gray matrices and a time series of smoothed gray values. Luminance data is plotted on segmented images for users to perform both: visual identification of ring borders, or control of automatic detection. Routines to visually include/exclude ring borders on the R graphical device, or automatically detect ring borders using a linear detection algorithm. This algorithm detects ring borders according to positive/negative extreme values in the smoothed time-series of gray values.
● Data Source:
CranContrib
● Keywords: package
● Alias: measuRing, measuRing-package
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0 images
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providing 
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