  We derive gain-tuning rules for the positive and negative spatial-feedback
loops of a spatially-distributed filter to change the resolution of its spatial
band-pass characteristic accordingly to a wavelet zoom, while preserving
temporal stability. The filter design is inspired by the canonical spatial
feedback structure of the primary visual cortex and is motivated by
understanding attentional control of visual resolution. Besides biology, our
control-theoretical design strategy is relevant for the development of
neuromorphic multiresolution distributed sensors through the feedback
interconnection of elementary spatial transfer functions and gain tuning.
