c# - How to match EMGU CV SIFT keypoints of two images? -

i want code match 2 pictures on basis of sift keypoints.?

i have following code sift

public static image<bgr, byte> siftfunction(bitmap sourcebitmap)     {         image<gray, byte> modelimage = new image<gray, byte>(sourcebitmap);         siftdetector siftcpu = new siftdetector();         vectorofkeypoint modelkeypoints = new vectorofkeypoint();         mkeypoint[] mkeypoints = siftcpu.detectkeypoints(modelimage, null);         modelkeypoints.push(mkeypoints);         imagefeature<float>[] reulst = siftcpu.computedescriptors(modelimage, null, mkeypoints);         image<bgr, byte> result = features2dtoolbox.drawkeypoints(modelimage, modelkeypoints, new bgr(color.red), features2dtoolbox.keypointdrawtype.default);         return result;     } 

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one solution use provided example of object detection , compare area of detection. in case whole observed image corresponds model image - images match.

other solution - not use descriptors @ select key points. compare key points arrays of 2 pictures , in case of equality consider images matching.

first solution somehow more reliable while second faster , easier.