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imPixelLine and imCircle

imPixelLine and imCircle

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15 Dec 2006 (Updated )

pixel by pixel version of imline and circle version of imrect

What's it?

What's it?

im_pix_line draws a "pixel by pixel" imline and im_circle draws a "circle version" of imrect.

Contents

INSTALL

im_pix_line and im_circle is adopted from imline and im_circle,respectively. So either of the following methods to intall is OK:

  • simple mode
     Unzip the zip file, copy the whole folder, im_ext, to any place on matlab search path
  • lazy mode
     Unzip the zip file.
     copy im_ext\im_circle.m, im_ext\im_pix_line.m to
     %matlabroot\toolbox\images\imuitools
     copy im_ext\private\pixLineSymbol.m im_ext\private\defaultCircle.m
     to %matlabroot\toolbox\images\imuitools\private
IMPORTANT: im_pix_line uses LineTwoPnts.mexw32 to draw a discrete line.
If the mex file is not available on your platform, please refer to
<http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=13221&objectType=file>
and then download the most up-to-date "fast bresenham" so that you can compile the
appropriate mex file on your platform.

usage of im_circle

im_circle is almostly identical to imrect, for example:

figure, imshow('cameraman.tif')
h = im_circle(gca, [110,60], 30);
api = iptgetapi(h);
api.setColor([1 0 0]);

% IMPORTANT: use 'imline' here since the toolbox function
% makeConstrainToRectFcn can only recognize one of the imline, imrect, impoint !!!
fcn =makeConstrainToRectFcn('imrect',get(gca,'XLim'),get(gca,'YLim'));
api.setDragConstraintFcn(fcn);

usage of im_pix_line

im_pix_line is almostly identical to imline, consider below example. (IMPORTANT: ensure t1_1.bmp is on your matlab search path)

imshow('t1_1.bmp');
im_pix_line(imgca,[189, 204],[195,214]);
zoom(6);
% You can try to drag the line at both end and the middle part.

That's all

Have fun:) For any suggestions/bug report, please email to gauss.1982@gmali.com Thank you!

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