I created a matlab gui to determine the length and width of a foot, the area of an existing foot, and use it to determine the size of the foot as well. here is the code I used

I created a matlab gui to determine the length and width of a foot, the area of an existing foot, and use it to determine the size of the foot as well. here is the code I used. but why do the results tend to be invalid, is there a solution?

a=getappdata(0,'a');
a_gray=rgb2gray(a);
axes(handles.axes2);
imshow(a_gray);

% Menetapkan ambang batas (contoh: ambang batas = 150, sesuaikan sesuai kebutuhan)
threshold = 115;

% Membuat mask untuk piksel cerah
brightPixelsMask = a_gray > threshold;

% Menampilkan gambar grayscale yang hanya menyoroti piksel cerah di axes 2
imshow(brightPixelsMask, 'Parent', handles.axes2);
% Menghitung panjang dan lebar dari area cerah
stats = regionprops(brightPixelsMask, 'MajorAxisLength', 'MinorAxisLength');

if ~isempty(stats)
    majorAxisLength = stats.MajorAxisLength;
    minorAxisLength = stats.MinorAxisLength;
    
    % Menampilkan hasil di static text
    resultString = sprintf('Panjang: %.2f pixel, Lebar: %.2f pixel', majorAxisLength, minorAxisLength);
    set(handles.text3, 'String', resultString);
    
    % Meminta pengguna untuk memasukkan nilai resolusi
    prompt = 'Masukkan nilai resolusi (PPI):';
    dlgTitle = 'Input Resolusi';
    numLines = 1;
    defaultResolusi = '300';  % Nilai default
    answer = inputdlg(prompt, dlgTitle, numLines, {defaultResolusi});
    
    if ~isempty(answer)
        % Mengambil nilai resolusi dari masukan pengguna
        resolusiScanner = str2double(answer{1});
        
        % Menghitung panjang dan lebar dalam milimeter
        panjang_mm = (majorAxisLength / resolusiScanner) * 2540 * 10;
        lebar_mm = (minorAxisLength / resolusiScanner) * 2540 * 10;
        
        % Menampilkan hasil akhir di static text
        resultStringFinal = sprintf('Panjang: %.2f mm, Lebar: %.2f mm', panjang_mm, lebar_mm);
        set(handles.text3, 'String', resultStringFinal);
    else
        % Jika pengguna membatalkan pemilihan resolusi
        set(handles.text3, 'String', 'Pemilihan resolusi dibatalkan.');
    end
else
    % Jika tidak ada area cerah, tampilkan pesan kosong
    set(handles.text3, 'String', 'Tidak ada area cerah.');
end

[Sakthiya Jayakumar]

Hey, there I can create a foot pressure heatmap with the sensors, is there anyway to convert those normal square looking heatmap to a one that resembles a foot shape? Is it possible?

[DGM]

This really should be asked as a new question, but it would help to know what sort of data resolution you actually have and how you're trying to present it.

[rizqi basith]

@Sakthiya Jayakumar hello sir, can the results of the foot scan in jpg format detect heat and pressure? Can using pressure and heat be more valid?

[rizqi basith]

@DGM because I did the foot scan, I really have the full specifications of the image, sorry i can not understand for for the questions about "how i trying to present it" what it mean?

[Walter Roberson]

@rizqi basith

No, the results of the foot scan in jpeg format cannot simultaneously store heat and pressure. JPEG can store only one value per location, so you would need two jpeg to store both heat and pressure.