How to find SparseIntFV From Fimag?

[Anonymous]

I am tring to get SparseIntFV from image. i have seen Image2DobleFV method but havn't found any for sparseIntFV. Is there any?

    DenseSIFT dsift = new DenseSIFT(5, 8);
    PyramidDenseSIFT<FImage> pdsift = new PyramidDenseSIFT<FImage>(dsift, 6f, 8);

    pdsift.analyseImage(image);

    FeatureExtractor<SparseIntFV, FImage> extractor = ?????
    extractor.extractFeature(image);

If not how would i found SparseFV from an image?

[Jonathon Hare]

Thats kind of an open question... it depends on what you want your SparseIntFV to contain. As you mention PyramidDenseSIFT, I assume that you want a bag of words feature? In that case, take a look at the tutorial: http://www.openimaj.org/tutorial/classification101.html

The extractor there builds a SparseIntFV using the BagOfWords and BlockSpatialAggegator classes; only the final .normalise() call transforms it into a DoubleFV.