如何重用现有的Tesseract Engine以提高性能？

Question

我正在使用Tesseract从屏幕上检测数字值，只要我的程序正在运行，我就需要它始终扫描屏幕上的更改。这一直很好，但是我注意到它非常占用CPU。在寻求有关此主题的帮助时，我遇到了这个question here，但是我不确定如何更改代码以重用现有的Tesseract Engine。我将在下面发布示例代码，但是在我的程序中，我需要扫描屏幕的4个不同区域以查找各种数字，所以我现在有4个Tesseract Engines。

以下是一些示例代码：

MainClass在程序处于活动状态时循环。

var thread_Character_CurrentMana = new Thread(Character.Character_CurrentMana)
{
    Name = "thread_Character_CurrentMana",
    IsBackground = true
};
thread_Character_CurrentMana.Start();

Character.cs

public static void Character_CurrentMana()
{
    CurrentMana = CharacterCurrentMana();
}

private static int CharacterCurrentMana()
{
    if (UI.MyCurrentMana_Width == -999999999 || UI.MyCurrentMana_Height == -999999999 ||
        UI.MyCurrentMana_PositionX == -999999999 ||
    UI.MyCurrentMana_PositionY == -999999999)
    return -1;

    try
    {
        using (var memoryImage =
        new Bitmap(UI.MyCurrentMana_Width, UI.MyCurrentMana_Height))
        {
            using (var memoryGraphics = Graphics.FromImage(memoryImage))
            {
                var _size = new Size(UI.MyCurrentMana_Width, UI.MyCurrentMana_Height);
            memoryGraphics.CopyFromScreen(UI.MyCurrentMana_PositionX,
                UI.MyCurrentMana_PositionY, 0, 0, _size);

            using (var ocr = new TesseractEngine(Program.TesseractDataFolder, "eng",
                EngineMode.TesseractAndCube))
            {
                using (var page = ocr.Process(memoryImage, PageSegMode.SingleWord))
                {
                    var value = 0;

                    if (int.TryParse(page.GetText(), out value))
                    {
                        var _MyCurrentMana = Convert.ToInt32(page.GetText());

                        return _MyCurrentMana;
                    }

                    return -1;
                }
            }
        }
    }
}
catch
{
    return -1;
}
}