How to perform Hot Spot Detection ?

HI,

what is the equivalent code to be used in App Designer, for the below .m file ?

Thanks

%% Calculate Object Properties Using Pixel Values of Grayscale Image
ti = imread('ti2.jpg');
sc = regionprops('ti2erode.png','ti2rgb.png',{'Centroid','WeightedCentroid'}); 
figure()
subplot(1,3,1)
imshow(ti)
title('Weighted (red) and Unweighted (blue) Centroids'); 
hold on
numObj = numel(sc);
for k = 1 : numObj
    plot(sc(k).WeightedCentroid(1), sc(k).WeightedCentroid(2), 'r*')
    plot(sc(k).Centroid(1), sc(k).Centroid(2), 'bo')
end
hold off

Answer 1

[Mario Malic]

There's no equivalent code in AppDesigner, if you just open it and do few examples there, you'll figure out what to do. I made some changes to your code, as this is most likely how it'll look like in App Designer, excluding these first two lines.

uiFig = uifigure;
uiAxes = uiaxes('Parent', uiFig)

%% Calculate Object Properties Using Pixel Values of Grayscale Image
ti = imread('ti2.jpg');
sc = regionprops('ti2erode.png','ti2rgb.png',{'Centroid','WeightedCentroid'}); 
imshow(ti, 'Parent', uiAxes)
title(uiAxes, 'Weighted (red) and Unweighted (blue) Centroids'); 
hold(uiAxes, 'on')
numObj = numel(sc);
for k = 1 : numObj
    plot(uiAxes, sc(k).WeightedCentroid(1), sc(k).WeightedCentroid(2), 'r*')
    plot(uiAxes, sc(k).Centroid(1), sc(k).Centroid(2), 'bo')
end
hold off

[Syed Muhammad Ali Minhal]

Thankyou @Mario Malic, you were right. By the end of the day I was able to figure out what was missing.

Also I was trying to plot in the UIImage instead of the UIAxes

thanks again

Ihsd = imshow(app.ti, 'Parent', app.UIAxes_4, ...
    'XData', [1 app.UIAxes_4.Position(3)], ...
    'YData', [1 app.UIAxes_4.Position(4)]);
hold(app.UIAxes_4, 'on')
app.alpha = imread("ti2erode.png"); %binary imaage
app.bravo = imread("ti2rgb.png"); % gray scale image
app.sc = regionprops(app.alpha,app.bravo,{'Centroid','WeightedCentroid'});
app.numObj = numel(app.sc);
for k = 1 : app.numObj
    plot(app.UIAxes_4, app.sc(k).WeightedCentroid(1), app.sc(k).WeightedCentroid(2), 'r*');
    plot(app.UIAxes_4, app.sc(k).Centroid(1), app.sc(k).Centroid(2), 'bo');
end