1. An adjusting apparatus for adjusting a 3D image to be outputted to a display panel, the 3D image being constituted by interlaced N first-eye-viewed image lines and N second-eye-viewed image lines, N being an integer larger than 1, the adjusting apparatus comprising: an adjusting module configured to receive the ith first-eye-viewed image line and an ith set of distributed first-eye-viewed leakage values, generated according to the (i−1)th second-eye-viewed image line, to generate an ith adjusted first-eye-viewed image line for the display panel, or receive the jth second-eye-viewed image line and a jth set of distributed second-eye-viewed leakage values, generated according to the jth first-eye-viewed image line, to generate a jth adjusted second-eye-viewed image line for the display panel, i being an integer index ranging from 2 to N, and j being an integer index ranging from 1 to N; a first determining module, configured to receive the jth adjusted first-eye-viewed image line, for determining the jth set of second-eye-viewed leakage values based on the jth adjusted first-eye-viewed image line and a plurality of pre-stored second-eye-viewed leakage values; a second determining module, configured to receive the (i−1)th adjusted second-eye-viewed image line, for determining the ith set of first-eye-viewed leakage values based on the (i−1)th adjusted second-eye-viewed image line and a plurality of pre-stored first-eye-viewed leakage values; a line buffer configured to alternately receive and buffer the jth set of second-eye-viewed leakage values and the ith set of first-eye-viewed leakage values; and a distributing module configured to receive the jth set of second-eye-viewed leakage values, buffered in the line buffer, to generate the jth set of distributed second-eye-viewed leakage values relative to the jth second-eye-viewed image line, or receive the ith set of first-eye-viewed leakage values, buffered in the line buffer, to generate the ith set of distributed first-eye-viewed leakage values relative to the ith first-eye-viewed image line.