processedExample: Matrix of pixel values of processed image from the NBIDE...

Description Usage Format Source

Description

A matrix of pixel values after processing, from an example image taken from the NBIDE study, one of the data sets available in the NIST Ballistics Toolmark Research Database. This image is a 2D breechface ring light image, and the original filename in the NIST download is "NBIDE R BF 118.png". The cartridge being imaged is a test fire from a Ruger gun (gun 3 in the study), using PMC ammunition. This image was processed using the function allPreprocess. It can also be obtained by running each pre-processing step individually (e.g. see code in help(inpaintedExample), and then run

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nonBF <- is.na(croppedExample);
processedExample <- gaussianFilter(inpaintedExample, nonBF)

). Theoretically, possible values are -510 to 510, but in actual fact the values are much smaller in magnitude. Pixels that are not part of the breechface marks are set to 0.

Usage

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Format

A matrix with dimensions 1372 x 1354. Each entry contains pixel values after processing.

Source

https://tsapps.nist.gov/NRBTD


xhtai/cartridges documentation built on June 1, 2019, 2:58 p.m.