lightbulbDetect.m

function results = lightbulbDetect(im)
%Image Processing Function
%
% IM      - Input image.
% RESULTS - A scalar structure with the processing results.
%

%--------------------------------------------------------------------------
% Auto-generated by imageBatchProcessor App. 
%
% When used by the App, this function will be called for every input image
% file automatically. IM contains the input image as a matrix. RESULTS is a
% scalar structure containing the results of this processing function.
%
%--------------------------------------------------------------------------



% Replace the sample below with your code----------------------------------

imgray = im2gray(im);
% X = imadjust(imgray);

% Threshold image - manual threshold
BW = imgray > 2.499000e+02;

% Open mask with default
radius = 6;
decomposition = 0;
se = strel('disk', radius, decomposition);
BW = imopen(BW, se);

% Close mask with default
radius = 6;
decomposition = 0;
se = strel('disk', radius, decomposition);
BW = imclose(BW, se);

% Create masked image.
results.maskedImage = imgray;
% results.maskedImage(~BW) = 0;

st = regionprops(BW, 'Area');
totalArea = 0;
for k = 1 : length(st)
    totalArea = totalArea + st(k).Area;
end
% results.area = totalArea;
results.proportion = totalArea / numel(imgray);
%--------------------------------------------------------------------------
end