MATLAB: How to get only the width and height

bounding boxmatrix array

I have a set a minimum width = 300 and height = 300 for the bounding box. I need to compare the width and height that is above 300. But right now, I am unable to compare them as I could not return the width or height values in each row. May I know how can I achieve that? Thanks.
bbox = 
1174  557  63  66
1692  1517  74  78
1157  467  69  73
1123  1447  72  77
887  1572  77  82
1586  1275  93  100
1589  1517  89  95
706  1300  115  122
540  1309  122  130
496  1718  1262  1342

Best Answer

To get the overall bounding box:
bbox = [
  1174  557  63  66
  1692  1517  74  78
  1157  467  69  73
  1123  1447  72  77
  887  1572  77  82
  1586  1275  93  100
  1589  1517  89  95
  706  1300  115  122
  540  1309  122  130
  496  1718  1262  1342]
% Find the xRight columns
xRight = bbox(:, 1) + bbox(:, 3)
% Find the yBottom rows
yBottom = bbox(:, 2) + bbox(:, 4)
% Find the overall left-most x value
xLeft = min(bbox(:, 1))
% Find the overall right-most x value

xRight = max(xRight)
% Find the overall top-most y value
yTop = min(bbox(:, 2))
% Find the overall right-most x value
yBottom = max(yBottom)
% Get the overall bounding box
overallBox = [xLeft, yTop, xRight-xLeft, yBottom-yTop]
% Plot the individual boxes
for row = 1 : size(bbox, 1)
  rectangle('Position', bbox(row, :), 'EdgeColor', 'b', 'LineWidth', 2);
  hold on;
end
% Plot the overall bounding box in red.
rectangle('Position', overallBox, 'EdgeColor', 'r', 'LineStyle', '--', 'LineWidth', 2);
axis equal
xlim([0,2000]);
ylim([0,3500]);
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