Package com.itextpdf.pdfocr.onnxtr.util

Class OpenCvUtil

java.lang.Object

com.itextpdf.pdfocr.onnxtr.util.OpenCvUtil

       public final class OpenCvUtil extends Object
      

Static class with OpenCV utility functions.

Method Summary

Modifier and Type	Method	Description
static org.bytedeco.opencv.opencv_core.RotatedRect	normalizeRotatedRect(org.bytedeco.opencv.opencv_core.RotatedRect rect)	Normalizes RotatedRect, so that its angle is in the [-45; 45) range.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

normalizeRotatedRect

             public static org.bytedeco.opencv.opencv_core.RotatedRect normalizeRotatedRect
             (org.bytedeco.opencv.opencv_core.RotatedRect rect)
            

Normalizes RotatedRect, so that its angle is in the [-45; 45) range.

We want our boxes to have the point order, so that it matches input image orientation. Otherwise, the orientation detection model will get a different box, which is already pre-rotated in some way. Here we will alter the rectangle, so that points would output the expected order.

This will make box have points in the following order, relative to the page: BL, TL, TR, BR. Bottom as in bottom of the image, not the lowest Y coordinate.

Parameters:

rect - RotatedRect to normalize

Returns:

normalized RotatedRect