public AsyncOCR(SImage image, OCRCallback callback = null)
{
this.image = image.Copy();
this.callback = callback;
if (image == null)
{
_bigBox = null;
_smallBoxes = new OCRBox[0];
_timeStamp = "[empty]";
isDone = true;
this.callback?.Invoke(this);
}
else
{
task = Task.Run(DoOCR);
}
}