/// <summary>
/// Performs OCR on a rectangle inside the given image.
/// </summary>
/// <param name="tesseract">The tesseract instance.</param>
/// <param name="image">The image.</param>
/// <param name="rectangle">The rectangle to perform OCR in.</param>
/// <returns>The found text as a UTF8 string.</returns>
public static Task <string> ReadAsync(this ITesseract tesseract, Image image, Rectangle rectangle)
{
if (tesseract is null)
{
throw new ArgumentNullException(nameof(tesseract));
}
byte[] data = BitmapToBytes(image);
int bpp = Image.GetPixelFormatSize(image.PixelFormat) / 8;
return(tesseract.ReadAsync(data, image.Width, image.Height, bpp, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height));
}
/// <summary>
/// Performs OCR on a rectangle inside the given image.
/// </summary>
/// <param name="tesseract">The tesseract instance.</param>
/// <param name="image">The image.</param>
/// <param name="rectangle">The rectangle to perform OCR in.</param>
/// <returns>The found text as a UTF8 string.</returns>
public static Task <string> ReadAsync(this ITesseract tesseract, SKBitmap image, SKRect rectangle)
{
if (tesseract is null)
{
throw new ArgumentNullException(nameof(tesseract));
}
if (image is null)
{
throw new ArgumentNullException(nameof(image));
}
byte[] data = BitmapToBytes(image);
return(tesseract.ReadAsync(data, image.Width, image.Height, 4, (int)rectangle.Left, (int)rectangle.Top, (int)rectangle.Width, (int)rectangle.Height));
}
/// <summary>
/// Performs OCR on a rectangle inside the given image.
/// </summary>
/// <param name="tesseract">The tesseract instance.</param>
/// <param name="image">The image.</param>
/// <param name="rectangle">The rectangle to perform OCR in.</param>
/// <returns>The found text as a UTF8 string.</returns>
public static Task <string> ReadAsync(this ITesseract tesseract, Image image, Rectangle rectangle)
{
if (tesseract is null)
{
throw new ArgumentNullException(nameof(tesseract));
}
if (image is null)
{
throw new ArgumentNullException(nameof(image));
}
byte[] data = BitmapToBytes(image);
return(tesseract.ReadAsync(data, image.Width, image.Height, 4, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height));
}
/// <summary> /// Performs OCR on a rectangle inside the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <param name="rectangle">The rectangle to perform OCR in.</param> /// <returns>The found text as a UTF8 string.</returns> public static string Read(this ITesseract tesseract, SKImage image, SKRect rectangle) => tesseract.Read(SKBitmap.FromImage(image), rectangle);
/// <summary> /// Performs OCR on the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <returns>The found text as a UTF8 string.</returns> public static string Read(this ITesseract tesseract, SKImage image) => tesseract.Read(SKBitmap.FromImage(image));
/// <summary> /// Performs OCR on the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <returns>The found text as a UTF8 string.</returns> public static Task <string> ReadAsync(this ITesseract tesseract, SKBitmap image) => tesseract.ReadAsync(image, new SKRect(-1, -1, -1, -1));
/// <summary> /// Performs OCR on the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <returns>The found text as a UTF8 string.</returns> public static string Read(this ITesseract tesseract, SKBitmap image) => tesseract.Read(image, new SKRect(-1, -1, -1, -1));
/// <summary> /// Performs OCR on a rectangle inside the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <param name="rectangle">The rectangle to perform OCR in.</param> /// <returns>The found text as a UTF8 string.</returns> public static Task <string> ReadAsync(this ITesseract tesseract, SKImage image, SKRect rectangle) => tesseract.ReadAsync(SKBitmap.FromImage(image), rectangle);
/// <summary> /// Performs OCR on the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <returns>The found text as a UTF8 string.</returns> public static Task <string> ReadAsync(this ITesseract tesseract, Image image) => tesseract.ReadAsync(image, new Rectangle(-1, -1, -1, -1));
/// <summary> /// Performs OCR on the given image. /// </summary> /// <param name="tesseract">The tesseract instance.</param> /// <param name="image">The image.</param> /// <returns>The found text as a UTF8 string.</returns> public static string Read(this ITesseract tesseract, Image image) => tesseract.Read(image, new Rectangle(-1, -1, -1, -1));
