Compare two arrays and return their remainder

Question

I am doing an image comparer for learning purposes.

I have done almost everything already and I am now improving it. To check for similarity, I have 2 jagged-multidimensional arrays (byte[][,]) where I access each element of each array using a triple for loop and store their remainder, like this:

for (int dimension = 0; dimension < 8; dimension++)
{
    Parallel.For(0, 16, mycolumn =>
    {
        Parallel.For(0, 16, myrow =>
        {
            Diffs[dimension][mycolumn, myrow] =
                (byte)Math.Abs(Image1Bytes[dimension][mycolumn, myrow]
                - Image2Bytes[dimension][mycolumn, myrow]);
        });
    });
}

Now, I would like to check how much each dimension is equal to another in the other collection.

How could I compare the entire arrays in each array (like array1[i][,] == array2[j][,])?

I think there are better ways to do these operations, but I have managed to do them pretty quickly.

How do you define "equality" for 2-D arrays? To the arrays just need the same contents in any order or should they be equal cell-by-cell? — D Stanley, Feb 02 '15 at 20:02

score 0 · Accepted Answer · edited May 23 '17 at 10:28

0

Here is an older thread on comparing two images that would be simple for you to adapt to your needs.

Compare Bitmaps

edited May 23 '17 at 10:28

Community

1
1

answered Feb 02 '15 at 20:37

John Taylor

446
3
8

score 0 · Answer 2 · answered Feb 03 '15 at 13:13

0

Since Array supports the IStructuralEquatable interface, you can use structural comparison:

using System.Collections;

. . .

var areEqual = StructuralComparisons.StructuralEqualityComparer.Equals(array1[i], array2[j]);

answered Feb 03 '15 at 13:13

Mark Shevchenko

7,937
1
25
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Compare two arrays and return their remainder

2 Answers2