android - "Moments" cannot be resolved to a type in opencv -


i have tried text extractor project using opencv tesseract library. while importing project added tesseract library. showing error in following of code.

moments moments = imgproc.moments(largest.get(0));         point center = new point(0,0);         center.x = moments.get_m10() / moments.get_m00();         center.y = moments.get_m01() / moments.get_m00();          list<point> points = largest.get(0).tolist();         points = sortcorners(points, center);

error is

moments cannot resolved type


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