Getting rid of a black background surrounding an Image

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Hello, I was wondering how it would be possible to get rid of a black background that I have in an image. My teacher says to use a "green screen", but I do not see how it works for my image. bg is the fixed scene in which my image will be moving across. I understand that he made the black canvas by using the zeros function, but I cannot get it to work with my image. His image that he used also had a black background and his image resulted in only the colored image that he wanted. My image is this: http://www.buzzle.com/articles/how-to-make-a-paper-airplane.html
Here's the code that he used:
[row col pg] = size(bg);
pg = zeros(row,col,'uint8');
canv = cat(3,pg,pg,pg);
image(canv)

Answers (1)

Vieniava
Vieniava on 2 Dec 2012
Edited: Vieniava on 2 Dec 2012
[row col pg] = size(bg);
pg = zeros(row,col,'uint8');
gr = 255*ones(row,col,'uint8');
canv = cat(3,pg,gr,pg);
image(canv)
  9 Comments
Vieniava
Vieniava on 2 Dec 2012
How does wind_turbines.jpg look like? How does airplanes.jpg look like?
Billy
Billy on 2 Dec 2012
Edited: Billy on 2 Dec 2012
wind_turbines.jpg looks like the picture in this link:
(The third picture, not including graphs)
airplanes.jpg looks like the picture in this link:

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