MATLAB: How to make each pair of pixels from the matrix in a row major order

digital image processing

Imag  A=[ 43   36   31   35   35   29   29   25
      33   33   32   29   25   25   22   22
      33   33   31   32   31   27   25   29
      28   33   35   27   25   29   32   51
      23   26   30   38   31   43   47   57
      27   29   30   37   40   52   63   61
      23   24   32   42   52   62   72   66
      24   30   44   54   65   71   70   74 ]
How can I make each pair of pixels from the matrix in a row major order? Such as (43,36)-first pair, (31,35)-second pair, (35,29)-third pair etc….

Best Answer

Hello Subroto. I have used a couple of steps to convert A into a vector of paired up pixels and stored it in A_paired.
>> A=[43   36   31   35   35   29   29   25
      33   33   32   29   25   25   22   22
      33   33   31   32   31   27   25   29
      28   33   35   27   25   29   32   51
      23   26   30   38   31   43   47   57
      27   29   30   37   40   52   63   61
      23   24   32   42   52   62   72   66
      24   30   44   54   65   71   70   74 ];
>> A_transpose = A';
>> A_vector = A_transpose(:);
>> A_paired = reshape(A_vector, 2, length(A_vector) / 2)'
A_paired =
    43    36
    31    35
    35    29
    29    25
    33    33
    32    29
    25    25
    22    22
    33    33
    31    32
    31    27
    25    29
    28    33
    35    27
    25    29
    32    51
    23    26
    30    38
    31    43
    47    57
    27    29
    30    37
    40    52
    63    61
    23    24
    32    42
    52    62
    72    66
    24    30
    44    54
    65    71
    70    74
I hope this was helpful. :)
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