Save extreme points in a single position

%Greetings, I need to verify if there is a way to keep the first position of the points of the Extrema function in my element. The point is that %during the sequence of images the points move and I need them to remain fixed in one position on the bottle. Otherwise find out if there is a %way to keep track of the bottom of the bottle and the top cap. Greetings and I enclose the code that I have at the moment

clc

close all

clear all

Dir = dir('*.tif');

tt=1;

Im = imread(Dir(tt).name);

seq = double(zeros(591,601,length(Dir)));

Minarea = 1500;

Mtaco=[];

for tt=190:369

Im = imread(Dir(tt).name);

Im2 = imrotate(Im,-90);

Im3 = 3*Im2(180:770,60:660,:);

Im3 = Im3(:,:,1) < 5959;

se = strel('disk',5);

cerrada = imclose(Im3,se);

bw = bwareaopen(cerrada,15000);

filled = imfill(bw, 'holes');

seq(:,:,tt) = filled;

imagesc(filled), axis image, axis off, colormap gray,

pause(0.001)

stats = regionprops(seq(:,:,tt),'Area','Centroid','Extrema','Orientation');

hold on

kk = [stats.Area] > Minarea;

stats = stats(kk);

Extrema3 = stats(1).Extrema;

plot(Extrema3(1,1),Extrema3(1,2),'*c'),pause(0.01)

plot(Extrema3(2,1),Extrema3(2,2),'*r'),pause(0.01)

plot(Extrema3(3,1),Extrema3(3,2),'og'),pause(0.01)

plot(Extrema3(4,1),Extrema3(4,2),'oy'),pause(0.01)

plot(Extrema3(5,1),Extrema3(5,2),'or'),pause(0.01)

plot(Extrema3(6,1),Extrema3(6,2),'oc'),pause(0.01)

plot(Extrema3(7,1),Extrema3(7,2),'ob'),pause(0.01)

plot(Extrema3(8,1),Extrema3(8,2),'om'),pause(0.01)

Mtaco = [Mtaco; Extrema3];

hold off

end

%Here I attach images of the problem that happens when the extreme points move through the image

Answer 1

[Nipun]

Hi Patricio,

I understand that you want to save extreme points (minimum and maximum) of a matrix in a single position. Here’s how you can do it concisely:

% Sample matrix
A = randi(100, 10, 10);

% Find minimum and maximum values and their indices
[minVal, minIdx] = min(A(:));
[maxVal, maxIdx] = max(A(:));

% Save extreme points in a single vector
extremePoints = [minVal, minIdx; maxVal, maxIdx];

disp(extremePoints);

This saves the minimum and maximum values along with their linear indices in the matrix extremePoints.

Hope this helps.

Regards,

Nipun