  We present in this paper a technique for imaging binary stars from speckle
data. This technique is based upon the computation of the cross-correlation
between the speckle frames and their square. This may be considered as a
simple, easy to implement, complementary computation to the autocorrelation
function of Labeyrie's technique for a rapid determination of the position
angle of binary systems. Angular separation, absolute position angle and
relative photometry of binary stars can be derived from this technique. We show
an application to the bright double star zeta Sge observed at the 2m Telescope
Bernard Lyot.
