mean_sample.m

局部滤波器的特征提取方法

function [sample_vector] = mean_sample(original_matrix, sample_height, sample_width)
% written by xiaoxun zhang. 
% 2004-09-09

original_matrix_height = size(original_matrix, 1);
original_matrix_width = size(original_matrix, 2);

sample_vector = [];
for row = 1 : sample_height : (original_matrix_height - mod(original_matrix_height, sample_height))
    for col = 1 : sample_width : (original_matrix_width - mod(original_matrix_width, sample_width))
        sub_sample_window = original_matrix(row:row+sample_height-1, col:col+sample_width-1);
        sample_vector = [sample_vector, mean(mean(sub_sample_window))];
    end
end

sample_vector = sample_vector';