retrieveGrayImage  476 modules/videoio/src/cap_openni.cpp     IplImage* retrieveGrayImage();
retrieveGrayImage 1346 modules/videoio/src/cap_openni.cpp         image = retrieveGrayImage();
retrieveGrayImage  123 modules/videoio/src/cap_openni2.cpp     IplImage* retrieveGrayImage();
retrieveGrayImage  900 modules/videoio/src/cap_openni2.cpp         image = retrieveGrayImage();