gusucode.com > 《MATLAB图像与视频处理实用案例详解》代码 > 《MATLAB图像与视频处理实用案例详解》代码/第 15 章 基于小波的图像压缩技术/wavedec_process.m
function [cf_vec, dim_vec] = wavedec_process(x, num, wave_name) if ndims(x) == 3 x = rgb2gray(x); end [lf, hf] = wfilters(wave_name, 'd'); o = x; x = double(x); cf_vec = []; dim_vec = size(x); for i = 1 : num [ya, yv, yh, yd] = dwt2_process(x, lf, hf); tmp = {yv; yh; yd}; dim_vec = [size(yv); dim_vec]; cf_vec=[tmp; cf_vec]; x = ya; end cf_vec = [ya; cf_vec]; figure; imshow(o, []); title('原图像'); plot_wave_coef(cf_vec); plot_wave_coef_join(cf_vec, dim_vec);