Finding line bounding boxes

Aspose.OCR allows you to automatically find the coordinates of image regions containing text lines. This can be useful for highlighting detected lines when previewing an image or extracting individual blocks of text.

To get bounding boxes of all lines of the image, use getTextAreas method of AsposeOCR class. Specify AreasType.LINES as the areaType parameter of the method.

Line detection works differently depending on the isDetectAreas parameter of the method:

detectAreas	Behavior
true	The OCR engine tries to break the content into paragraphs and then extracts lines from the found paragraphs. Best suited for multi-column texts - adjacent lines in different columns will be treated as separate lines rather than a single line.
false	The OCR engine ignores the columns and combines adjacent lines from different columns into a single line. This can be useful when concatenating text from table rows.

This method works for images in the following formats: GIF, PNG, JPEG, BMP, WBMP.

From file

AsposeOCR api = new AsposeOCR();
ArrayList<Rectangle> paragraphs = api.getTextAreas("source.png", AreasType.LINES, true);
paragraphs.forEach((region) -> {
	System.out.println(region.recognitionText);
});

From stream

AsposeOCR api = new AsposeOCR();
BufferedImage source = ImageIO.read(new File("source.png"));
ArrayList<Rectangle> paragraphs = api.getTextAreas(source, AreasType.LINES, true);
paragraphs.forEach((region) -> {
	System.out.println(region.recognitionText);
});

Coordinates of each line (top-left corner, width and height) are returned as a list of Rectangle objects.