imager (version 0.45.8)

grab: Select image regions interactively

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. Note that you need X11 library to use these functions.

Usage

grabLine(im, output = "coord")
grabRect(im, output = "coord")
grabPoint(im, output = "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.

Arguments

im

an image

output

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

Author

Simon Barthelme

See Also

display

Examples

cimg.limit.openmp()
##Not run: interactive only 
##grabRect(boats)
##grabRect(boats,TRUE)