#1 A Potential Bug of Gabor Feature Extraction in Lire 0.8

[Arthur Lin]

I have used the excellent Lire 0.8 for research experiments, especially for image feature extraction. Today, I found that the implementation of Gabor in Lire 0.8 may have a bug. Specifically, in function "getFeature(BufferedImage image) " of "Gabor.java" (package: "net.semanticmetadata.lire.imageanalysis"), the following codes may be wrong.

for (int m = 0; m < M; m++) {
for (int n = 0; n < N; n++) {
featureVector[m * N + n * 2] = magnitudes[m][n] / imageSize;
......
}
}

The sentence " featureVector[m * N + n * 2] = magnitudes[m][n] / imageSize" is supposed to be replaced with "featureVector[m * 2 * N + n * 2] = magnitudes[m][n] / imageSize". Otherwise, overwriting will happen in the loop.

Please check the potential bug carefully. Thank you very much for your outstanding work.