public void ToMatGray8()
{
const int width = 3;
const int height = 4;
var buffer = new byte[height, width]
{
{ 1, 2, 3 },
{ 4, 5, 6 },
{ 7, 8, 9 },
{ 10, 11, 12 },
};
var wb = new WriteableBitmap(width, height, 92, 92, PixelFormats.Gray8, null);
wb.WritePixels(new Int32Rect(0, 0, width, height), buffer, width, 0);
using var mat = WriteableBitmapConverter.ToMat(wb);
Assert.Equal(MatType.CV_8UC1, mat.Type());
Assert.Equal(width, mat.Cols);
Assert.Equal(height, mat.Rows);
var indexer = mat.GetUnsafeGenericIndexer <byte>();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Assert.True(buffer[y, x] == indexer[y, x],
$"wb[{y},{x}] = {buffer[y, x]}, mat[{y},{x}] = {indexer[y, x]}");
}
}
}
public Mat fn_GetImage()
{
Mat matRtn = null;
ImageBrush ib = canvas.Background as ImageBrush;
if (ib != null)
{
WriteableBitmap wb = ib.ImageSource as WriteableBitmap;
if (wb != null)
{
matRtn = WriteableBitmapConverter.ToMat(wb);
}
}
return(matRtn);
}
public void ToMatBgr24()
{
const int width = 3;
const int height = 4;
var buffer = new byte[height, width * 3]
{
{ 1, 2, 3, 4, 5, 6, 7, 8, 9 },
{ 10, 11, 12, 13, 14, 15, 16, 17, 18 },
{ 19, 20, 21, 22, 23, 24, 25, 26, 27 },
{ 28, 29, 30, 31, 32, 33, 34, 35, 36 },
};
var wb = new WriteableBitmap(width, height, 92, 92, PixelFormats.Bgr24, null);
wb.WritePixels(new Int32Rect(0, 0, width, height), buffer, width * 3, 0);
using var mat = WriteableBitmapConverter.ToMat(wb);
Assert.Equal(MatType.CV_8UC3, mat.Type());
Assert.Equal(width, mat.Cols);
Assert.Equal(height, mat.Rows);
var indexer = mat.GetUnsafeGenericIndexer <Vec3b>();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
var expected = new Vec3b(buffer[y, x * 3 + 0], buffer[y, x * 3 + 1], buffer[y, x * 3 + 2]);
var actual = indexer[y, x];
Assert.True(actual == expected,
$"wb[{y},{x}] = {expected}, mat[{y},{x}] = {actual}");
}
}
}