error in ORB feature tracking

asked 2015-05-18 21:26:51 -0600

Sheng Liu gravatar image

I have a task to track a car in a video. And I decide to use the ORB feature and Flann. Firstly select the car in the frame. Secondly match the selected car and the next frames. But when the area of selected ROI is small, an error occor and the program crashes. So I choose the BFMatcher instead of Flann. However, the same problem occor. I guess there is something wrong in the parameters of Flann. But I have no idea how to adjust the parameters. (the Flann and the BFMatcher have some bugs?) Could you help me?

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I think that the ROI is getting smaller and smaller, and you'll get in the case of image too small to extract the descriptors. You have the area, maybe you can pick a larger ROI from where to extract the descriptors. Am I right?

thdrksdfthmn gravatar imagethdrksdfthmn ( 2015-05-19 02:28:52 -0600 )edit

Thanks. The area of the car is small from the first frame to the last frame in the video. So maybe I could not pick a large ROI.

Sheng Liu gravatar imageSheng Liu ( 2015-05-19 20:45:11 -0600 )edit