grab: Select image regions interactively

Description Usage Arguments Value Author(s) See Also Examples

Description

These functions let you select a shape in an image (a point, a line, or a rectangle) They either return the coordinates of the shape (default), or the contents. In case of lines contents are interpolated. Note that grabLine does not support the "pixset" return type.

Usage

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grabLine(im, output = "coord")

grabRect(im, output = "coord")

grabPoint(im, output = "coord")

Arguments

im

an image

output

one of "im","pixset","coord","value". Default "coord"

Value

Depending on the value of the output parameter. Either a vector of coordinates (output = "coord"), an image (output = "im"), a pixset (output = "pixset"), or a vector of values (output = "value"). grabLine and grabPoint support the "value" output mode and not the "im" output.

Author(s)

Simon Barthelme

See Also

display

Examples

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##Not run: interactive only 
##grabRect(boats)
##grabRect(boats,TRUE)

imager documentation built on May 29, 2017, 8:46 p.m.