Method ocr.recognize

Overload

Performs OCR (text recognition).

public static ocr recognize(IFArea area, OcrFlags flags = 0, double scale = 0, IOcrEngine engine = null)
Parameters
area  (IFArea)

On-screen area or image:

  • wnd - window or control (its client area).
  • elm - UI element.
  • System.Drawing.Bitmap - image.
  • RECT - a rectangle area in screen.
  • IFArea - can contain wnd, elm or Bitmap. Also allows to specify a rectangle in it, which makes the area smaller and the function faster. Example: new(w, (left, top, width, height)).
flags  (OcrFlags)
scale  (double)

Scale factor (how much to resize the image before performing OCR). Value 2 or 3 may improve results of OCR engine OcrWin10 or OcrTesseract. If 0 (default), depends on engine's IOcrEngine.DpiScale and area's DPI.
engine  (IOcrEngine)

OCR engine. Default: ocr.engine (OcrWin10 if not specified).
Returns
ocr

Returns an ocr object that contains recognized words etc. Returns null if the area is empty.
Exceptions
AuWndException

Invalid window handle (the area argument).
ArgumentException

An argument is/contains a null/invalid value.
AuException

Something failed.

Remarks

The function captures image from screen or window (unless area is Bitmap) and passes it to the OCR engine (calls IOcrEngine.Recognize). Then finds the specified text in results. If found, creates and returns an ocr object that contains results.

The speed depends on engine, area size and amount of text.