1. An apparatus for extracting correlation parameters between color planes for prediction, the apparatus comprising: a neighboring block searching unit responsive to a second block of a reconstructed previous plane corresponding to a first block to be encoded of a current plane, for searching for a third block belonging to neighboring blocks of the second block and having a smallest difference in pixel value from the second block; a correlation parameter calculator for calculating correlation parameters between the third block and a fourth block reconstructed of the current plane and corresponding to the third block, based on the third block and the fourth block, and a predictor for predicting the first block based on the second block and calculated correlation parameters.