Description     Claims     Drawing  

Distinctive image features from scale-invariant keypoints   [0007]  [0074] 
A performance evaluation of local descriptors   [0009] 
Compressed Histogram of Gradients: A Low-Bitrate Descriptor   [0009] 
Registration of multispectral satellite images with Orientation-Restricted SIFT   [0011] 
Color and Texture Descriptors   [0012] 
Survey of SIFT compression schemes   [0017]