How to draw the image using co-ordinates?

Hello

i want to draw the image using the cordinates. I got the extracted ROI's from freesurfer now is it possible to draw the ROI's using these cordinates?

Answer 1

[Akshat]

Hi @SADIA KAMAL,

I am assuming you have the vertices of the ROI. Here is some boilerplate code to assist you:

function plotROIs(coords, labels)
    figure;
    hold on;
    
    uniqueLabels = unique(labels);
    colors = lines(length(uniqueLabels));
    
    for i = 1:length(uniqueLabels)
        roiIdx = labels == uniqueLabels(i);
        roiCoords = coords(roiIdx, :);
        
        scatter3(roiCoords(:,1), roiCoords(:,2), roiCoords(:,3), ...
                'filled', 'MarkerFaceColor', colors(i,:));
                
        if size(roiCoords, 1) > 3 
            k = boundary(roiCoords); % Create convex hull
            trisurf(k, roiCoords(:,1), roiCoords(:,2), roiCoords(:,3), ...
                   'FaceColor', colors(i,:), 'FaceAlpha', 0.3);
        end
    end
    
    % Make it look nice
    grid on;
    axis equal;
    xlabel('X'); ylabel('Y'); zlabel('Z');
    view(3); % 3D view
    rotate3d on;
end

% Example usage:
% coords = [x, y, z] coordinates from FreeSurfer
% labels = ROI labels/numbers
% plotROIs(coords, labels);

Hope this helps