Intra prediction processing apparatus, intra prediction processing method, intra prediction processing program, image encoding apparatus and image decoding apparatus

摘要

PROBLEM TO BE SOLVED: To perform intra-prediction capable of enhancing encoding performance and subjective image quality.SOLUTION: There provided deriving means for deriving filter use information by determining based on intra prediction mode information and block size information whether an intra smoothing filter is applicable to a reference pixel signal or not, maximum value calculating means for obtaining a decoded pixel signal required for generating an intra prediction signal specified by decoded pixel position information and calculating the maximum value of a difference absolute value between decoded pixels as an edge of the decoded pixel signal, setting means for reading and setting a threshold value for the maximum value of the difference absolute value from a predetermined table, correction means for comparing the maximum value of the calculated absolute difference value between the respective decoded pixels with a threshold value and correcting the filter use information of the intra smoothing filter when the maximum value of the difference absolute value is equal to or larger than the threshold value, and implementation means for implementing the intra smoothing filter based on the corrected filter use information.SELECTED DRAWING: Figure 1