public static FlatMatrix <int> GetSubMatrix(this FlatMatrix <int> matrix, int x, int y, int width, int height, int cellSize)
{
width /= cellSize;
height /= cellSize;
var subMatrix = new FlatMatrix <int>(width, height);
for (var i = 0; i < width; i++)
{
for (var j = 0; j < height; j++)
{
var average = 0;
for (var k = 0; k < cellSize; k++)
{
for (var l = 0; l < cellSize; l++)
{
average += matrix[x + i * cellSize + k, y + j * cellSize + l];
}
}
average /= cellSize * cellSize;
subMatrix[i, j] = average;
}
}
return(subMatrix);
}
public Image(int width, int height)
{
Width = width;
Height = height;
X = new FlatMatrix <Type>(width, height);
Y = new FlatMatrix <Type>(width, height);
Z = new FlatMatrix <Type>(width, height);
}
public Image(Image image)
{
Width = image.Width;
Height = image.Height;
X = new FlatMatrix <Type>(image.X);
Y = new FlatMatrix <Type>(image.Y);
Z = new FlatMatrix <Type>(image.Z);
}
public static void SetSubMatrix(this FlatMatrix <int> matrix, int x, int y, FlatMatrix <int> subMatrix, int cellSize)
{
for (var i = 0; i < subMatrix.Width; i++)
{
for (var j = 0; j < subMatrix.Height; j++)
{
for (var k = 0; k < cellSize; k++)
{
for (var l = 0; l < cellSize; l++)
{
matrix[x + i * cellSize + k, y + j * cellSize + l] = subMatrix[i, j];
}
}
}
}
}
private static ImageBlocks ToBlocks(Image image)
{
var imageBlocks = new ImageBlocks(image.Width, image.Height);
for (var i = 0; i < image.Width; i += Block.Size)
{
for (var j = 0; j < image.Height; j += Block.Size)
{
FlatMatrix <int> y = image.X.GetSubMatrix(i, j, Block.Size, Block.Size);
FlatMatrix <int> u = image.X.GetSubMatrix(i, j, Block.Size, Block.Size, 2);
FlatMatrix <int> v = image.X.GetSubMatrix(i, j, Block.Size, Block.Size, 2);
var yBlock = new Block
{
Position = (i, j),
Type = BlockType.Y,
Values = y
};
var uBlock = new Block
{
Position = (i, j),
Type = BlockType.U,
Values = u
};
var vBlock = new Block
{
Position = (i, j),
Type = BlockType.V,
Values = v
};
imageBlocks.Blocks.Add(yBlock);
imageBlocks.Blocks.Add(uBlock);
imageBlocks.Blocks.Add(vBlock);
}
}
return(imageBlocks);
}
}
}
