How to draw a curved rectangle on a matrix with given two points?

How to draw a curved rectangle matrix with given two points?

Assume, two points given:

a = [1,0.5];

b = [1,3.5];

And the created curved rectangle should be like this:

But the point is, all I finally want, is an image matrix return, not just to plot this figure using rectangle(); on screen.

Thanks, guys~

ps: in a binary scale.

Answer 1

[Joachim Schlosser]

If you want an image matrix, I still suggest using rectangle() to first draw, then exporting the figure to bitmap for getting the image matrix.

[John W. Z]

Hi Joachim, Thanks for your answer, It would work if I use getframe() converting figure to matrix, but it seems lack of efficiency, in which the speed is chief consideration. I found insertShape() could insert image to matrix, but I failed even with times trying. Would you mind help me with this?

http://cn.mathworks.com/help/vision/ref/insertshape.html

[Joachim Schlosser]

insertShape cannot directly draw rounded rectangles. You may first want to try the above solution using

 set(0,'DefaultFigureVisible','off');

to disable the display of the figure and thus drastically increase speed.