private void ShowYolo(YoloCoords yoloCoords)
{
MouseHelper.SetWaitCursor();
try
{
var img = _viewModel.CurrentBitmap;
if (img == null)
{
return;
}
if (yoloCoords.Height <= double.Epsilon || yoloCoords.Width <= double.Epsilon)
{
imgPreview.Source = null;
txtCoords.Text = "";
return;
}
// render how translating back from yolo coords will look
var rwidth = (int)(yoloCoords.Width * img.Width);
var rheight = (int)(yoloCoords.Height * img.Height);
var imgx = (int)(yoloCoords.X * img.Width - rwidth / 2.0);
var imgy = (int)(yoloCoords.Y * img.Height - rheight / 2.0);
if (imgy + rheight > img.Height)
{
rheight = img.Height - imgy;
}
if (imgx + rwidth > img.Width)
{
rwidth = img.Width - imgx;
}
var rect = new Rectangle(imgx, imgy, rwidth, rheight);
var newImg = img.Clone(rect, img.PixelFormat);
var hbitmap = newImg.GetHbitmap();
var bmpsource = Imaging.CreateBitmapSourceFromHBitmap(
hbitmap,
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromWidthAndHeight(rwidth, rheight)
);
BitmapCloner.DeleteObject(hbitmap);
newImg.Dispose();
txtCoords.Text = $"x: {imgx} y: {imgy} w: {rwidth}px h: {rheight}px";
imgPreview.Source = bmpsource;
}
finally
{
MouseHelper.ResetCursor();
}
}
private void ShowSelectedRegionProperties()
{
var idx = _viewModel.SelectedRegionIndex;
if (idx == null)
{
imgPreview.Source = null;
txtCoords.Text = "";
return;
}
var region = _viewModel.ImageRegions[idx.Value];
var yoloCoords = new YoloCoords
{
X = region.X,
Y = region.Y,
Height = region.Height,
Width = region.Width
};
ShowYolo(yoloCoords);
}