@ARTICLE{improving2012,
     Title={Improving image retrieval using combined features of Hough transform and Zernike moments},
     Author={Chandan Singh, Pooja Sharma},
     Journal={Optics and Lasers in Engineering},
     Volume={49},
     Number={12},
     Pages={1386-1396},
     Publisher={Elsevier},
     Year={2012}
}