选用最低位平面嵌入秘密信息的LSB算法，用MATLAB实现该算法的（1）信息隐藏；（2）信息提取；（3）测试。(The LSB algorithm, which uses the lowest bit plane to embed secret information, is used to realize the (1) information hiding of the algorithm by MATLAB; (2) information extraction; (3) test.)