  1D or 2D neutron imaging detectors with individual wire or strip readout
using discriminators have the advantage of being able to treat several neutron
impacts partially overlapping in time, hence reducing global dead time. A
single neutron impact usually gives rise to several discriminator signals. In
this paper, we introduce an information-theoretical definition of image
resolution. Two point-like spots of neutron impacts with a given distance
between them act as a source of information (each neutron hit belongs to one
spot or the other), and the detector plus signal treatment is regarded as an
imperfect communication channel that transmits this information. The maximal
mutual information obtained from this channel as a function of the distance
between the spots allows to define a calibration-independent measure of
resolution. We then apply this measure to quantify the power of resolution of
different algorithms treating these individual discriminator signals which can
be implemented in firmware. The method is then applied to different detectors
existing at the ILL. Center-of-gravity methods usually improve the resolution
over best-wire algorithms which are the standard way of treating these signals.
