  We describe a project of brown dwarf detection in the dark halo of a galaxy
using the microlensing effect. We argue that monitoring pixels instead of stars
could provide an enhancement in the number of detectable events. We estimate
the detection efficiency with a Monte-Carlo simulation. We expect a ten-fold
increase with respect to current experiments. To assess the feasibility of this
method we have determined the photometric precision of a pixel by comparing
several pictures of a same field in the
  LMC. To be published in the Proceeding of the workshop 'The dark side of the
universe...', Roma, Juin 1993,
