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2013-06-13 03:32:15 -0600 received badge  Self-Learner (source)
2013-06-13 02:48:42 -0600 answered a question Feature extraction not reproducible

Found the root of the problem:

I used OpenMP to extract features from multiple images in parallel and to compare them against expected results (which were previously calculated and saved).

Hereby, I did not assure the correct order of loading: E.g.: Features from image A were extracted in thread 1 and compared with the expected results of image B (and vice versa).

2013-05-27 04:18:25 -0600 received badge  Supporter (source)
2013-05-22 05:00:07 -0600 received badge  Student (source)
2013-05-22 04:04:59 -0600 asked a question Feature extraction not reproducible

Within a program I've written, I'm reading jpg-images using cv::imread() and extract Sift-features afterwards.

I recently updated OpenCV from version 2.4.1 to 2.4.4, but since that day, the feature extraction is not reproducible any more: The number of extracted features, feature locations and descriptors differ when executing my software multiple times (with constant input-parameters, of course)

Tests with Surf or Orb result in equal behaviour.