Tesseract.PageSegMode

`Tesseract.PageSegMode` is an enumeration in the Tesseract library that represents the page segmentation mode to be used during OCR.

Here are the different values available for `Tesseract.PageSegMode`:

- `Tesseract.PageSegMode.OsdOnly`: Orientation and script detection (OSD) only
- `Tesseract.PageSegMode.AutoOsd`: Automatic page segmentation with OSD
- `Tesseract.PageSegMode.AutoOnly`: Automatic page segmentation, but no OSD or OCR
- `Tesseract.PageSegMode.Auto`: Fully automatic page segmentation, but no OSD or OCR
- `Tesseract.PageSegMode.SingleColumn`: Assume a single column of text of variable sizes
- `Tesseract.PageSegMode.SingleBlockVertText`: Assume a single uniform block of vertically aligned text
- `Tesseract.PageSegMode.SingleBlock`: Assume a single uniform block of horizontally aligned text
- `Tesseract.PageSegMode.SingleLine`: Assume a single text line
- `Tesseract.PageSegMode.SingleWord`: Assume a single word of text
- `Tesseract.PageSegMode.CircleWord`: Treat the image as a single word in a circle
- `Tesseract.PageSegMode.SingleChar`: Treat the image as a single character

You can set the page segmentation mode of a `TesseractEngine` instance by calling its `SetPageSegMode` method and passing in a `Tesseract.PageSegMode` value. For example:

using Tesseract;

class MyOCRProgram {
    static void Main(string[] args) {
        // Initialize the TesseractEngine with the default configuration
        using (var engine = new TesseractEngine("./tessdata", "eng", EngineMode.Default)) {
            // Set the page segmentation mode to single line
            engine.SetPageSegMode(PageSegMode.SingleLine);

            // 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 page segmentation mode of the `TesseractEngine` instance to `PageSegMode.SingleLine`. This will cause the engine to assume that there is only one line of text in the image, which may improve OCR accuracy in certain cases.