getPosition
Return current position of ROI object
getPosition
is not recommended. Using the new ROIs, retrieve the
position of the ROI by accessing the value of Position
property
instead. For more information, see Version History.
Syntax
Description
Input Arguments
Output Arguments
pos
— Position of ROI object
numeric array
Position of the ROI object, returned as a numeric array. The shape of the array depends on the type of ROI object.
ROI Object | Returned position |
---|---|
imellipse | 4-element vector of the form [xmin ymin width
height] , representing the size and position of
a bounding box around the ellipse. The initial size of the
bounding box is
width -by-height
pixels. The upper-left corner of the box is at the (x,y)
coordinate
(xmin ,ymin ). |
imfreehand | n-by-2 matrix. The two columns define the x- and y-coordinates, respectively, of the n points along the boundary of the freehand region. |
imline | 2-by-2 matrix of the form [x1 y1; x2
y2] , representing the position of the two
endpoints of the line. |
impoint | 1-by-2 vector of the form [x
y] . |
impoly | n-by-2 matrix. The two columns define the x- and y-coordinates, respectively, of each of the n vertices. |
imrect | 4-element vector of the form [xmin ymin width
height] . The initial size of the rectangle is
width -by-height
pixels. The upper-left corner of the rectangle is at the
(x,y) coordinate
(xmin ,ymin ). |
Version History
Introduced in R2008aR2018b: getPosition
is not recommended
Starting in R2018b, a new set of ROI objects replaces the existing set of ROI objects. The new objects provide more functional capabilities, such as face color transparency. The new classes also support events that you can use to respond to changes in your ROI such as moving or being clicked. Although there are no plans to remove the old ROI objects at this time, switch to the new ROIs to take advantage of the additional capabilities and flexibility. For more information on creating ROIs using the new ROI functions, see Create ROI Shapes.
To retrieve the current position of the ROI, access the value of the
Position
property of the ROI.
Update all instances of getPosition
.
Discouraged Usage | Recommended Replacement |
---|---|
This example creates an ROI and uses
imshow('cameraman.tif');
h = imrect(gca,[10 10 100 100]);
pos = getPosition(h)
| Here is equivalent code, replacing the old ROI with a
new ROI object and then accessing the value of the
imshow('cameraman.tif'); h = drawrectangle(gca,'Position',[10 10 100 100]); pos = h.Position |
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