Filtering a ROI using Simulink

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Marco
Marco 2014-1-17
评论： vcmorini 2017-2-22
Hi,
I need to filter an ROI that contains an object using median filter and convert it to binary image for Blob Analysis. I created the ROI using Autothreshold block and I tried with following code using MATLAB Function block:
function BW2 = filtroi(I,roi)
coder.extrinsic('strel');
coder.extrinsic('roifilt2')
coder.extrinsic('fspecial')
coder.extrinsic('im2bw');
BW2 = false(size(I));
k = fspecial('average'); %I could not find median-filter kernel
if isempty(find(roi)) == true
I2 = I;
else
I2 = roifilt2(k,I,roi);
end
BW2 = im2bw(I2);
but the visualization (to Video Display block) doesn't show the resulting bw image. Some suggest?
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Marco
Marco 2014-1-20
编辑：Marco 2014-1-20
sorry I'm late. Thanks for reply; this is the model
the problem is that ROI is nonzero-regions of BW image. PS: inside MATLAB fcn block there is above code as far as I2 creation.
vcmorini
vcmorini 2017-2-22
Hi, I have specific regions in my image which I want to analyse, using simulink.
How can I make a ROI of this?
Have some example which I can see?
Thks!!

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