How can I handle visibility on/off for plot function?

I am drawing circles over binary image using plot function. How can I keep the visibility off for the portion when the circle going through background and it will be on for image object portion ?

Answer 1

[Kevin Phung]

For graphic objects, there is a 'Visible' Property that you can adjust.

If you have a handle for your line object, for example:

a = plot(1:5,1:5); % a is your handle to the line

set(a,'Visible','off'); %'off' or 'on'
%or
a.Visible = 'off';

if you wish to do this beyond the scope of the original function, you can look for this line object by accessing the children of the axes.

g = gca; %gets the current axes
objs = g.Children %this will list all line objects in your g axes
%then from here you can index to the appropriate line object you want

[Zara Khan]

This will either off the entire line or on the entire. But I want to keep a portion of the line on and a portion off at the same time. when the line will get image object it will be on and when it will get backgroung then it will be off.

[Witek Jachimczyk]

Hi Zara,

Is a graphics plot overlay needed? Could you work with images directly?

Here is one possibility:

• you can create the circles using insertShape function: https://www.mathworks.com/help/vision/ref/insertshape.html and draw them into a new blank image (matrix)
• then use imblend to create your composite image; you'd use it with the mask syntax so that your binary image is used as a mask and defines which pixels will bleed through to your destination image

Hopefully, these tips will lead you to a solution that you desire.

Cheers,

Witek