  We describe a new method for superresolution of still images (in the wavelet
domain) based on the reconstruction of missing details subbands pixels at a
given ith level via Rule of Three (Ro3) between pixels of approximation subband
of such level, and pixels of approximation and detail subbands of (i+1)th
level. The histogramic profiles demonstrate that Ro3 is the appropriate
mechanism to recover missing detail subband pixels in these cases. Besides,
with the elimination of the details subbands pixels (in an eventual compression
scheme), we obtain a bigger compression rate. Experimental results demonstrate
that our approach compares favorably to more typical methods of denoising and
compression in wavelet domain. Our method does not compress, but facilitates
the action of the real compressor, in our case, Joint Photographic Experts
Group (JPEG) and JPEg2000, that is, Ro3 acts as a catalyst compression
