fn myregionprops

Custom region props: macregionprops

This function is used primarily in functions getKnownTracksVariables and updateKnownFrame, where the same calculations are made many times.

This is a simple function to compute the region props in a customised way to make the code more readable, understandable, and to have a single point of change if a need to change the region properties to be computed.

function [regs] = macregionprops(x, whichX)
% CUSTOM REGIONPROPS. Forget about coding exactly what you're computing!

if nargin == 1
    regs = regionprops(x>0, 'BoundingBox', 'Perimeter', 'Area',...
        'EquivDiameter', 'MajorAxisLength', 'MinorAxisLength', 'Solidity');
elseif nargin == 2
    regs = regionprops(x==whichX, 'BoundingBox', 'Perimeter', 'Area',...
        'EquivDiameter', 'MajorAxisLength', 'MinorAxisLength', 'Solidity');
else
    fprintf('%s: ERROR. Wrong input. Try: \n\n\t help macregionprops',...
        mfilename);
    regs = [];
end

Running this routine is simple:

[regs] = macregionprops(x);

is equivalent to doing:

regs = regionprops(x>0, 'BoundingBox', 'Perimeter', 'Area',...
    'EquivDiameter', 'MajorAxisLength', 'MinorAxisLength', 'Solidity');

Alternatively, you can also try:

[regs] = macregionprops(x, whichX);

which, in turn, is equivalent to:

regs = regionprops(x==whichX, 'BoundingBox', 'Perimeter', 'Area',...
    'EquivDiameter', 'MajorAxisLength', 'MinorAxisLength', 'Solidity');

in case you want the regionprops of a particular labelled object.