Device and method for adjusting parallax, imaging apparatus, and image reproduction device

A parallax adjustment device comprising:

• a first operation unit for outputting a first operation signal based on an amount of operating the first operation unit;
• a distance determining section for determining a target convergence point distance based on the first operation signal, the target convergence point distance being determined by increasing or reducing a current convergence point distance by a distance proportionate to the amount of operating the first operation unit, a convergence point distance being a distance to a convergence point at which no parallax is caused;
• a shift amount setting section for setting a shift amount of each viewpoint image such that an amount to be shifted per unit amount of operating the first operation unit is nonlinearly increased or reduced in a direction of parallax of the each viewpoint image in accordance with a distance change from the current convergence point distance to the target convergence point distance;
• and
• an image shifting section for shifting the each viewpoint image by the shift amount and thereby changing the parallax.