The experiments reported here have been made in connection with a general program, aiming at the accurate and detailed photometric study of the Milky Way and M31 Globular Clusters, that our group is currently carrying on by obtaining precise color-magnitude diagrams and complete and unbiased luminosity functions.
Six HST proposals have been approved over the length of the 4 cycles of HST operations, and the specific aim of these experiments is to improve the capabilities of our data analysis and, in particular, of the stellar photometry, which is mostly performed with the ROMAFOT and IRAF packages.
Here we report on the analysis of HST simulated images, with special emphasis on the photometry of individual stars in crowded fields (before and after image restoration) and on the description of the surface brightness profiles of simulated clusters with different deconvolution techniques and sizes of the adopted PSF and data matrices.