An apparatus comprises at least one processing device comprising a processor coupled to a memory. The at least one processing device is configured to obtain an input visual stimulus, to detect feature points in the input visual stimulus, and to identify densities of the detected feature points in each of two or more distinct regions of the input visual stimulus. The at least one processing device is also configured to determine relative information density in the two or more distinct regions of the input visual stimulus. The at least one processing device is further configured to modify a design of the input visual stimulus to adjust the relative information density among at least two of the two or more distinct regions of the input visual stimulus.