function data = augmentData(data)
% Randomly flip images and bounding boxes horizontally.
tform = randomAffine2d('XReflection',true);
sz = size(data{1});
rout = affineOutputView(sz,tform);
data{1} = imwarp(data{1},tform,'OutputView',rout);

% Sanitize box data, if needed.
data{2} = helperSanitizeBoxes(data{2}, sz);

% Warp boxes.
data{2} = bboxwarp(data{2},tform,rout);
end