Changing the background color

How do we change the background colour of a boundary in the image?

[Adam]

What image?

[Selina Loh]

A curved shape image

[Guillaume]

If you are talking about an image pinned to your wall, then you could go to your local diy shop, buy a pot of paint and a brush and use that ...

If you are talking about something else, maybe an image loaded in matlab, then give a lot more details, e.g.

• How is the image created (using imwrite, using plot functions?)
• What is the background colour of a boundary? For me, a boundary is a line. A line does not have a background.
• What is a curved shape image? Images in matlab are always rectangular.

An example of input and desired output would go a long way towards us understanding what you want.

Answer 1

[Rik]

That really depends on the context. I have sometimes converted the image to greyscale and then called bwlabel. With that you can simply find out the label of the (1,1) position.

If you are talking about the background of a figure, look at the figure properties with fig_h=figure;get(fig_h) and see the options for yourself.