ahd = 0;
                                    for (regionInPictureWidthIndex = 0; regionInPictureWidthIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_width; regionInPictureWidthIndex++) {
                                        for (regionInPictureHeightIndex = 0; regionInPictureHeightIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_height; regionInPictureHeightIndex++) {
                                            for (int bin = 0; bin < HISTOGRAM_NUMBER_OF_BINS; ++bin) {
                                                ahd += ABS((int32_t)picture_control_set_ptr->temp_filt_pcs_list[index_center]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin] - (int32_t)picture_control_set_ptr->temp_filt_pcs_list[pic_itr]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin]);
                                            }
                                        }
                                    }

 ahd = 0;
                                    for (regionInPictureWidthIndex = 0; regionInPictureWidthIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_width; regionInPictureWidthIndex++) {
                                        for (regionInPictureHeightIndex = 0; regionInPictureHeightIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_height; regionInPictureHeightIndex++) {
                                            for (int bin = 0; bin < HISTOGRAM_NUMBER_OF_BINS; ++bin) {
                                                ahd += ABS((int32_t)picture_control_set_ptr->temp_filt_pcs_list[index_center]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin] - (int32_t)picture_control_set_ptr->temp_filt_pcs_list[pic_itr]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin]);
                                            }
                                        }
                                    }

ahd = 0;
                                        for (regionInPictureWidthIndex = 0; regionInPictureWidthIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_width; regionInPictureWidthIndex++) {
                                            for (regionInPictureHeightIndex = 0; regionInPictureHeightIndex < sequence_control_set_ptr->picture_analysis_number_of_regions_per_height; regionInPictureHeightIndex++) {
                                                for (int bin = 0; bin < HISTOGRAM_NUMBER_OF_BINS; ++bin) {
                                                    ahd += ABS((int32_t)picture_control_set_ptr->temp_filt_pcs_list[index_center]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin] - (int32_t)picture_control_set_ptr->temp_filt_pcs_list[pic_itr]->picture_histogram[regionInPictureWidthIndex][regionInPictureHeightIndex][0][bin]);
                                                }
                                            }
                                        }