function JQM = getjqm(quality,isColor)
% function JQM = getjqm(quality,isColor)
% Modifed Date : Feb.18th
% for single input parameter, this function works
% exactly as same as old function getjqm

if nargin == 1
    isColor =0 ;
    % isColor == 0  : use basicJQM
    % isColor == 1  : use colorJQM
end

basicJQM = [16 11 10 16 24 40 51 61;
                       12 12 14 19 26 58 60 55;
                       14 13 16 24 41 57 69 56;
                       14 17 22 29 51 87 80 62;
                       18 22 37 56 68 109 103 77;
                       24 35 55 64 81 104 113 92;
                       49 64 78 87 103 121 120 101;
                       72 92 95 98 112 100 103 99];
   
colorJQM = [17 18 24 47 99 99 99 99;
                      18 21 26 66 99 99 99 99;
                      24 26 56 99 99 99 99 99;
                      47 66 99 99 99 99 99 99;
                      99 99 99 99 99 99 99 99;
                      99 99 99 99 99 99 99 99;
                      99 99 99 99 99 99 99 99;
                      99 99 99 99 99 99 99 99];
                  
if quality <= 0 quality = 1;
 end
 if quality > 100 quality = 100;
 end

 if quality < 50
    scalefactor = 5000/quality;
 else
    scalefactor = 200 - quality*2;
 end
 
 if isColor == 0
    JQM = double(uint8((basicJQM*scalefactor+50)/100));   
else
    JQM = double(uint8((colorJQM*scalefactor+50)/100));   
end