You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: AlignLLPanoramas.m
    path of file: ./repos/HDR_Toolbox/source_code/EnvironmentMaps
    
    the code of the file until where you have to start completion: function [img1_rot, rot, err] = AlignLLPanoramas(img1, img2, bVisualization)
%
%
%     [img1_rot, rot, err] = AlignLLPanoramas(img1, img2, bVisualization)
%
%     This function finds the rotation around Y-axis in pixel for aligning
%     the panorma img1 (in longitude-latitude format) to the panorma
%     img2 (in longitude-latitude format).
%       
%     Note that img1 and img2 have to share the same Y-axis in order to

    
function [img1_rot, rot, err] = AlignLLPanoramas(img1, img2, bVisualization)
%
%
%     [img1_rot, rot, err] = AlignLLPanoramas(img1, img2, bVisualization)
%
%     This function finds the rotation around Y-axis in pixel for aligning
%     the panorma img1 (in longitude-latitude format) to the panorma
%     img2 (in longitude-latitude format).
%       
%     Note that img1 and img2 have to share the same Y-axis in order to
%     produce a meaningful result!
%
%
%     Input:
%       -img1: unaligned image
%       -img2: reference panorama for alignment
%       -bVisualization: if it set to 1 this will show the result of 
%                        minimization
%
%     Output:
%       -img1_rot: img1 rotated to be aligned to img2
%       -rot: rotation in pixel. Img1 needs to be shifted of rot pixels in
%             order to be aligned to img2. For the rotation use imShiftWrap.m
%       -err: matching error
%
%     Copyright (C) 2012-16  Francesco Banterle
% 
%     This program is free software: you can redistribute it and/or modify
%     it under the terms of the GNU General Public License as published by
%     the Free Software Foundation, either version 3 of the License, or
%     (at your option) any later version.
% 
%     This program is distributed in the hope that it will be useful,
%     but WITHOUT ANY WARRANTY; without even the implied warranty of
%     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%     GNU General Public License for more details.
% 
%     You should have received a copy of the GNU General Public License
%     along with this program.  If not, see <http://www.gnu.org/licenses/>.
%

if(~exist('bVisualization', 'var'))
    bVisualization = 0;
end