Convert Black and White bitmap to boolean array

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Fast way to convert a Bitmap into a Boolean array in C#?

in my project I have a resource that is a black and white bitmap which I'm using to hold some 4x4 black and white sprites. Before I can use this data effectively though I need to convert it to a 2D multidimensional (or jagged, doesn't matter) boolean array, with false representing white and black representing true.

Here is my current solution:

    public Bitmap PiecesBitmap = Project.Properties.Resources.pieces;
    bool[,] PiecesBoolArray = new bool[4, 16]; // 4 wide, 16 high (4 4x4 images)

    for (int x = 0; x < 4; x++)
            {
                for (int y = 0; y < 16; y++)
                {
                    if (PiecesBitmap.GetPixel(x, y) == Color.Black)
                    {
                        PiecesBoolArray[x, y] = true;
                    }
                    else
                    {
                        PiecesBoolArray[x, y] = false;
                    }

                }
            }

Since I will be calling this function a lot (with different bitmaps), is there a more efficient way of doing this? .GetPixel is kind of slow, and it just feels like I'm missing out on some trick here. Thank you for any suggestions.

Check the answer here http://stackoverflow.com/a/4235768/529282 — Martheen, Jun 12 '12 at 15:20
You may get a c-style pointer to the data. Take a look at Bitmap.LockBits http://msdn.microsoft.com/en-us/library/5ey6h79d.aspx — mortb, Jun 12 '12 at 15:23

score 2 · Accepted Answer · answered Jun 12 '12 at 15:20

2

Use Bitmap.LockBits. You'll find tutorials on the web.

answered Jun 12 '12 at 15:20

usr

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For example here: http://stackoverflow.com/a/1563170/284240 – Tim Schmelter Jun 12 '12 at 15:27

Convert Black and White bitmap to boolean array

1 Answers1