MATLAB: Threshold of 0.5

0.5thresholdthresholding

Hi,

May I know what is the specific thresholding technique name's that use thresholding of 0.5?

Thank you.

Iqbal

Best Answer

If you are referring to the default level for http://www.mathworks.com/help/images/ref/im2bw.html then it is using a simple ">=" comparison. One of the names for that is "binarization"; there are other names.

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I suggest you grab a book on image processing and look up morphological operations.

Opening is an erosion followed by a dilation.

Similarly closing is a dilation followed by an erosion.

MATLAB: Add 0.5 *0.5 degree grid on figure (country)

This illustrates the general approach:

x = linspace(44, 64);
y = linspace(25, 40);
t = linspace(0,2*pi);
circx = 0.25*(max(x)-min(x))*cos(t)+min(x);
circy = 0.25*(max(y)-min(y))*sin(t)+min(y);
figure
plot(circx, circy)
xt = get(gca, 'XTick');
set(gca, 'XTick',round(linspace(min(xt),max(xt),2*numel(xt)-1),1), 'XTickLabel',round(linspace(min(xt),max(xt),2*numel(xt)-1),1))
yt = get(gca, 'YTick');
set(gca, 'YTick',round(linspace(min(yt),max(yt),2*numel(yt)-1),1), 'YTickLabel',round(linspace(min(yt),max(yt),2*numel(yt)-1),1))

I do not have the map coordinates, so I cannot reproduce the plot.

Best Answer

Related Solutions

MATLAB: Imerode and imopen

MATLAB: Add 0.5 *0.5 degree grid on figure (country)

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