pointPicker {imageUtilities} | R Documentation |
interactive interface for selecting points on an image (grid).
pointPicker(imgArray = NULL, vp = NULL, numPoints = 4, VERTEX_COLOUR = "yellow", LINE_COLOUR = "white", verbose = FALSE, ...)
imgArray |
the input image *array* to have the user click on. Supply this, OR |
vp |
handle to an existing viewport where the image is already plotted |
numPoints |
the number of points to have the user select. Default 4. |
VERTEX_COLOUR |
R colour (string) specifying the colour to draw the points in on the graphics window. NULL to omit, default "yellow". |
LINE_COLOUR |
R colour (string) specifying the colour to draw lines between the points (NULL to omit). Default 'white' |
verbose |
boolean, whether to spit out extra debug info. |
... |
arguments passed in to
|
a numPointsx2 array (X,Y) of points the user clicked on. The points are 1-based and the *middle* of the top-left pixel has coordinates (1,1).
Other draw: drawImage
,
imdisp
, imdrawabline
,
imdrawline
, plotPoints