>> p1
Pixels of class uint8
Image size (height-by-width-by-number-of-color-planes): 648  556    3

ans(:,:,1) =

   77   67   60   63   66
   80   70   62   63   65
   78   68   61   63   65
   71   63   58   62   66
   70   62   58   62   67


ans(:,:,2) =

   72   62   55   58   61
   75   65   57   58   60
   73   63   56   58   60
   66   58   53   57   61
   65   57   53   57   62


ans(:,:,3) =

   68   58   51   54   57
   71   61   53   54   56
   69   59   52   54   56
   62   54   49   53   57
   61   53   49   53   58