使用matlab的bin2dec错误

Question

我正在做一个项目，我需要使用LSB水印技术将半色调置换图像嵌入基础原始图像。我在浏览互联网时发现了以下代码，但在执行时会抛出以下错误。

??? Error using ==> bin2dec
Binary string may consist only of characters 0 and 1

Error in ==> hi77 at 71
final = bin2dec(baseImage); 

代码：

wm_image = reshape(outImg(randperm(numel(outImg))),size(outImg)); % permuted watermark image.
figure;
imshow(wm_image);
[wm_row,wm_col]=size(wm_image);
wm = dec2bin(wm_image);
wmlength = wm_row*wm_col;
baseImagelength = row*col;
baseImage = dec2bin(inImg);% Original gray scale image
i=1;
j=1;
k=1;
counter=0; 
while i < baseImagelength
          counter=counter+1;
          if counter > wmlength
              break;
          end
          baseImage(i,8)=wm(j,k);
          k=k+1;
          if k>8
              k=1;
              j=j+1;
          end
          i=i+1;
  end
      key1=wm_row
      key2=wm_col
final = bin2dec(baseImage);
final = reshape(final,row,col);
img1(1:row,1:col)=final(1:row,1:col);
imshow(img1);

请使用上述代码帮助任何人。