axes2pix - Convert axes coordinates to pixel coordinates
Syntax
pixelx = axes2pix(dim, XDATA, AXESX)
Description
pixelx = axes2pix(dim, XDATA, AXESX) converts
an axes coordinate into a pixel coordinate. For example, if pt
= get(gca,'CurrentPoint') then AXESX could
be pt(1,1) or pt(1,2). AXESX must
be in pixel coordinates. XDATA is a two-element
vector returned by get(image_handle, 'XData') or get(image_handle,'YData'). dim is
the number of image columns for the x coordinate,
or the number of image rows for the y coordinate.
Class Support
dim, XDATA, and AXESX can
be double. The output is double.
Note
axes2pix performs minimal checking on the
validity of AXESX, DIM, or XDATA.
For example, axes2pix returns a negative coordinate
if AXESX is less than XDATA(1).
The function calling axes2pix bears responsibility
for error checking.
Examples
Example with default XData and YData.
h = imshow('pout.tif');
[nrows,ncols] = size(get(h,'CData'));
xdata = get(h,'XData')
ydata = get(h,'YData')
px = axes2pix(ncols,xdata,30)
py = axes2pix(nrows,ydata,30)Example with non-default XData and YData.
xdata = [10 100]
ydata = [20 90]
px = axes2pix(ncols,xdata,30)
py = axes2pix(nrows,ydata,30)
See Also
impixelinfo, bwselect, imfill, impixel, improfile, roipoly
 | applylut | | bestblk |  |
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