IF(QT4_FOUND)
  ADD_SUBDIRECTORY(affine-op)
  ADD_SUBDIRECTORY(convolution-op)
  ADD_SUBDIRECTORY(fft)
  ADD_SUBDIRECTORY(gabor-op)
  ADD_SUBDIRECTORY(temporal-smoothing)
  ADD_SUBDIRECTORY(warp-op)
ENDIF()

IF(QT4_FOUND AND IPP_FOUND)
  ADD_SUBDIRECTORY(canny-op)
ENDIF()