Is there any way to do an operator on a specific region

Is there any way to do an operator on a specific region ?? for example I want to do imfill just on the Lower left quadrant of the page... I search and find blockproce but I could not do this for Lower left quadrant of the page??? thanks

Answer 1

[Mohammad Abouali]

Something like this would work.

[r,c]=size(BWImage);

rHalf=round(r/2);
cHalf=round(c/2);

lowerLeftQuadrant=BWImage(rHalf:r,1:cHalf);
lowerLeftQuadrant=imfill(lowerLeftQuadrant);

BWImage(rHalf:r,1:cHalf)= lowerLeftQuadrant;

Note that You can make the code shorter by replacing the last three lines of code as follow:

BWImage(rHalf:r,1:cHalf)= imfill( BWImage(rHalf:r,1:cHalf) );

Answer 2

[Anand]

What you're looking for is the roifilt2 function.

Answer 3

[Iain]

A simple way is to simply chop it off:

 % (Tune the numbers for what you need)
 LowerLeftquad = my_image(74:end,1:30); % assuming a single frame of black & white.
 LowerLeftquad = my_image(74:end,1:30,:); % assuming a single colour frame or many black & white.

Do what you want:

 LowerLeftquad = imfill(LowerLeftquad);

And stick it back:

 my_image(74:end,1:30) = LowerLeftquad;