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

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sara
sara 2014-9-30
回答： Iain 2014-9-30
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

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采纳的回答

Mohammad Abouali
Mohammad Abouali 2014-9-30
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) );

更多回答（2 个）

Anand
Anand 2014-9-30
What you're looking for is the roifilt2 function.
Iain
Iain 2014-9-30
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;

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