How to perform Hot Spot Detection ?

Question

Syed Muhammad Ali Minhal 2021-1-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/731058-how-to-perform-hot-spot-detection

评论： Syed Muhammad Ali Minhal 2021-1-30

采纳的回答： Mario Malic

在 MATLAB Online 中打开

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

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mario Malic 2021-1-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/731058-how-to-perform-hot-spot-detection#answer_610118

在 MATLAB Online 中打开

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

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Syed Muhammad Ali Minhal 2021-1-30

在 MATLAB Online 中打开

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