c# 使用 new TesseractEngine

Sure, here's an example of how you could create a new TesseractEngine instance in C#:

1. First, you'll need to add the Tesseract NuGet package to your project. You can do this by right-clicking on your project in Solution Explorer, selecting "Manage NuGet Packages", and searching for "Tesseract".

2. Once you've added the Tesseract package to your project, you can create a new TesseractEngine instance like this:

using Tesseract;

class MyOCRProgram {
    static void Main(string[] args) {
        // Set the path to the tessdata directory
        Environment.SetEnvironmentVariable("TESSDATA_PREFIX", "/path/to/tessdata");

        // Initialize the TesseractEngine with the default configuration
        using (var engine = new TesseractEngine("./tessdata", "eng", EngineMode.Default)) {
            // Use the TesseractEngine to perform OCR on an image
            using (var img = Pix.LoadFromFile("/path/to/image.png")) {
                using (var page = engine.Process(img)) {
                    var text = page.GetText();
                    Console.WriteLine(text);
                }
            }
        }
    }
}

In this example, we set the `TESSDATA_PREFIX` environment variable to point to the directory containing the Tesseract training data. Then, we create a new `TesseractEngine` instance with the `./tessdata` directory as the `datapath`, `"eng"` as the language, and `EngineMode.Default` as the engine mode. Finally, we use the `Process` method of the `TesseractEngine` to perform OCR on an image and print the result.

I hope this helps! Let me know if you have any further questions.