Matlab implay tracking question

Hello, I have modified the car tracking software below to track all blobs, or at least this is my goal. However, I am having trouble. Here is the loop I am working in, it will look familiar to some:

for k = 1 : nframes
  singleFrame = read(bwStack, k);

    % Convert to grayscale to do morphological processing.
    I = rgb2gray(singleFrame);

    % Remove dark objs.
    noDarkValues = imextendedmax(I, threshValue);

    % Remove lane markings and other non-disk shaped structures.
 noSmallStructures = imopen(noDarkValues, sedisk);

    % Remove small structures.
    noSmallStructures = bwareaopen(noSmallStructures, 10);
    noSmallStructures = bwlabeln(noSmallStructures);
    % Get the area and centroid of each remaining object in the frame. The
    % object with the largest area is the light-colored object.  Create a copy
    % of the original frame and tag the object by changing the centroid pixel
    % value to red.
    taggedObjs(:,:,:,k) = singleFrame;

    stats = regionprops(noSmallStructures,'Centroid','Area','PixelIdxList','PixelList');
  if ~isempty([stats.Area])
        areaArray = [stats.Area];
        [junk,idx] = max(areaArray);
        c = stats(idx).Centroid;
        c = floor(fliplr(c));
        width = 2;
        row = c(1)-width:c(1)+width;
        col = c(2)-width:c(2)+width;
        taggedObjs(row,col,1,k) = 255;
        taggedObjs(row,col,2,k) = 0;
        taggedObjs(row,col,3,k) = 0;
    end
end

The last part (the if loop) is where I am having trouble. I need to replace the "finding the largest area and plot that centroid" with find all centroids over a certain threshold

if(stats(i).Area>10)

And then plot all of the centroids which make it past the threshold instead of having merely one centroid per frame. In addition, is there a easy way to add color labels to all of these objects?

[Walter Roberson]

There is no such thing as an if loop.