- "Not sufficient match points" error: The error message you're receiving indicates that there are not enough matching SIFT features between the object (motorcycle) in the first frame and the subsequent frames. This can happen if the motorcycle's appearance significantly changes across frames or if the SIFT features are not robust enough to handle such variations.
To improve feature matching, you can try using a different feature descriptor, such as SURF (Speeded-Up Robust Features) or ORB (Oriented FAST and Rotated BRIEF). These descriptors may provide better performance in terms of matching under different conditions. You can replace the detectSIFTFeatures and extractFeatures functions with their SURF or ORB counterparts in your code.
kp_obj = detectSURFFeatures(im_obj);
kp_esc = detectSURFFeatures(im_esc);
[feat_obj, kp_obj] = extractFeatures(im_obj, kp_obj);
[feat_esc, kp_esc] = extractFeatures(im_esc, kp_esc);
2. Negative values for nbox2: The negative values in nbox2 indicate that the bounding box coordinates are not in the expected format. The format should be [x, y, width, height], where (x, y) represents the top-left corner of the bounding box, and width and height represent the dimensions.
To fix this issue, you can check if the width and height values calculated from nbox are negative and correct them accordingly. Here's an example of how to handle this:
nbox2 = [nbox(1, 1), nbox(1, 2), abs(nbox(2, 1) - nbox(1, 1)), abs(nbox(3, 2) - nbox(1, 2))];
Remember to adjust any other parts of your code that rely on the changes made. Good luck with your project!
