  The color X-ray camera SLcam(R) is a full-field, single photon detector
providing scanning free, energy and spatially resolved X-ray imaging. Spatial
resolution is achieved with the use of polycapillary optics guiding X-ray
photons from small regions on a sample to distinct energy dispersive pixels on
a CCD. Applying sub-pixel resolution, signals from individual capillary
channels can be distinguished. Accordingly the SLcam(R) spatial resolution can
be released from pixel size being confined rather to a diameter of individual
polycapillary channels. In this work a new approach to sub-pixel resolution
algorithm comprising photon events also from the pixel centers is proposed. The
details of the employed numerical method and several sub-pixel resolution
examples are presented and discussed.
