Create a dynamic window to scan an image in C#

Question

I am very beginner in C# and I have an absurd method which is described below.

If I want to create a 3x3 window and find average value of these 9 pixels I follow that way:

IM[i - 1, j - 1]
IM[i - 1, j]
IM[i - 1, j + 1]
IM[i, j - 1]
IM[i, j + 1]
IM[i - 1, j - 1]
IM[i - 1, j]
IM[i - 1, j + 1]
IM[i, j]

If I want to create a 5x5 window and put it on each pixel to find average of these 25 pixel I follow that way:

IM[i - 2, j - 2]
IM[i - 1, j - 2]
IM[i, j - 2]
IM[i + 1, j - 2]
IM[i + 2, j - 2]
IM[i - 2, j - 1]
IM[i - 1, j - 1]
IM[i, j - 1]
IM[i + 1, j - 1]
IM[i + 2, j - 1]
IM[i - 2, j]
IM[i - 1, j]
IM[i, j]
IM[i + 1, j]
IM[i + 2, j]
IM[i - 2, j + 1]
IM[i - 1, j + 1]
IM[i, j + 1]
IM[i + 1, j + 1]
IM[i + 2, j + 1]
IM[i - 2, j + 2]
IM[i - 1, j + 2]
IM[i, j + 2]
IM[i + 1, j + 2]
IM[i + 2, j + 2]

If I want to create 7x7 or more window, it is too hard to write position of each pixel in the 7x7 window.

I want to create the dynamic window whose size is defined by user. How can I do that? Is there any way to do that?

If you really want to do image processing you do not work with windows but with Bitmaps. If you actually want to do calculations you should use Arrays. - Of course you can create both in (more or less) any size dynamically. You also should learn about the for loop.. — TaW

Haedrian Haedrian · Accepted Answer · 2014-11-16T18:37:23

You can extend this (by replacing 3 with the number you're interested in) for a box of any size.

for(int x=-3; x <= 3; x++)
{
    for (int y=-3; y <= 3; y++)
    {
        IM[i+ x, j + y] //theres your reference, if you're going to get the average you can add it to a sum or whatever
    }
}

Create a dynamic window to scan an image in C#

1 Answers