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ORB how-to.

I need to program my bot so that it is able to find an object that is it asked to pickup and bring it to the commanded position. I have tried simple img processing techniques like filtering, contour finding. that doesn't seems to work well. I want to use ORB feature extractor. here are a sample images. object of interest is the ball. In short how do I train my bot to pickup balls or other objects any sample program will be helpful. how to use ORB. provide an example if possible. is there a way to use it in C-api thanx in advance

ball 01 ball 02

ORB how-to.

I need to program my bot so that it is able to find an object that is it asked to pickup and bring it to the commanded position. I have tried simple img processing techniques like filtering, contour finding. that doesn't seems to work well. I want to use ORB feature extractor. here are a sample images. object of interest is the ball. In short how do I train my bot to pickup balls or other objects any sample program will be helpful. how to use ORB. provide an example if possible. is there a way to use it in C-api thanx in advance

ball 01 ball 02

Edit: what will be the best or better choice for detecting objects like this. I am able to process the image into more of this form[look at here answers.opencv.org/question/6090/locate-the-circle-in-the-image/… but the final output of the process changes with ball color(I updated the hue values for red color) illumination and environment for example [pasteall.org/pic/43818 ]. is there a unified pipeline to detect the ball and other simple objects without much texture in it??