Issue Converting Keypoints To And From Json And Then Using Flannbasedmatcher

I'm saving my KeyPoints and Descriptors in a JSON file. Later when I retrieve them, I am trying to use them in a FlannBasedMatcher. However, I think something is going wrong in the

Solution 1:

Solution was deceptively simple.

des2 = np.array(rawDes,dtype=np.uint8)