Error using imshow function

the error I get is

Error using imageDisplayValidateParams
Expected input number 2, [LOW HIGH], to be non-NaN.

Error in checkDisplayRange (line 11)
validateattributes(display_range, {'numeric'},...

Error in imageDisplayValidateParams (line 57)
common_args.DisplayRange = checkDisplayRange(common_args.DisplayRange,mfilename);

Error in imageDisplayParseInputs (line 79)
common_args = imageDisplayValidateParams(common_args);

Error in imshow (line 198)
  [common_args,specific_args] = ...

Error in FOA_good4 (line 125)
imshow(message,[]);

The code is

      function FOA_DWT=FOA_good4(oo,pp)
      X_axis=10*rand();
      Y_axis=10*rand();
      maxgen=oo; 
      sizepop=pp;
      for ii=1:sizepop   
       disp('smelli');disp(ii);
      X_F(ii)=X_axis+2*rand()-1;
      Y_F(ii)=Y_axis+2*rand()-1;
      D(ii)=(X_F(ii)^2+Y_F(ii)^2)^0.5;
      S(ii)=1/D(ii);
      disp(S(ii));
      I = imread('lena512.bmp');
      figure(1);
      subplot(221);imshow(I);title('yuanshituxiang');
      w=imread('22.bmp');
      subplot(222);
      imshow(w);title('shuiyintuxiang');
      w1=w;
      xx=1;yy=1;
      T=10;m=90;   
      tt=xx;xx=xx+yy;yy=tt+2*yy;
      while xx~=1&&yy~=1;
          T=T+1;
          if xx>m
              xx=mod(xx,m);
          end
          if yy>m
              yy=mod(yy,m);
          end
          tt=xx;xx=xx+yy;yy=tt+2*yy;
      end
      iTimes=20;    
      message=w1;
      Mm=size(message,1);               
      Nm=size(message,2); 
      if Mm~=Nm
        error('shuiyinbixuweifangzhen');
      end
      if Mm~=64
        error('error');
      end
      tempImg=message;
      for n=1:iTimes   
        for u=1:Mm
          for v=1:Nm
            temp=tempImg(u,v);
            ax=mod((u-1)+(v-1),Mm)+1;  
            ay=mod((u-1)+2*(v-1),Nm)+1;   
            outImg(ax,ay)=temp;
          end
        end
      tempImg=outImg;
      message=tempImg;
      w1=message;
      end
      watermark_zl=outImg;
      imwrite(watermark_zl,'watermark_zl.bmp');
      [cA1,cH1,cV1,cD1]=dwt2(I,'haar');      
      [cA2,cH2,cV2,cD2]=dwt2(cA1,'haar');
      [cA3,cH3,cV3,cD3]=dwt2(cA2,'haar');
      [mm1,nn1]=size(cA3);
      [U,S,V]=svd(cA3);  
      [Uw,Sw,Vw]=svd(double(w1));
      PCw=Uw*Sw;
      Temp=S+S(ii)*PCw;
      CW=U*Temp*V';
      X3=idwt2(CW,cH3,cV3,cD3,'haar');     
      X2=idwt2(X3,cH2,cV2,cD2,'haar'); 
      Y=idwt2(X2,cH1,cV1,cD1,'haar');
      watermarked=Y;
      A=uint8(watermarked);
      imwrite(A,'dwt_svd_watermarked.bmp','bmp'); 
      figure(1)
      subplot(2,2,3)
      imshow(watermarked,[]);
      title('qiantushuiyinhoutuxiang')
      [ccA1,ccH1,ccV1,ccD1]=dwt2(watermarked,'haar');  
      [ccA2,ccH2,ccV2,ccD2]=dwt2(ccA1,'haar'); 
      [ccA3,ccH3,ccV3,ccD3]=dwt2(ccA2,'haar');
      [cA1,cH1,cV1,cD1]=dwt2(I,'haar');      
      [cA2,cH2,cV2,cD2]=dwt2(cA1,'haar');
      [cA3,cH3,cV3,cD3]=dwt2(cA2,'haar'); 
       WNN=zeros(mm1,nn1);
       WN=zeros(mm1,nn1);
       WN=(U'*(ccA3-cA3)*V)/S(ii);
       WNN=WN*Vw';
      tempImg=WNN;
      message_arnold=tempImg;
      iTimes1=48-iTimes;
      Mo=size(outImg,1);               
      No=size(outImg,2);      
      for n=1:iTimes1 
        for u=1:Mo
          for v=1:No
            temp1=tempImg(u,v);
            bx=mod((u-1)+(v-1),Mo)+1;
            by=mod((u-1)+2*(v-1),No)+1;
            outImg1(bx,by)=temp1;
          end
        end
      tempImg=outImg1;
      end
      message=outImg1;
      figure(1);
      subplot(2,2,4)
      imshow(message,[]);
      title('tiqushuiyin');
      watermark_ok=message;
      imwrite(watermark_ok,'watermark_ok.bmp','bmp');   
      PSNR=psnr(I,watermarked); disp('PSNR:');disp(PSNR)
      NC=nc(WNN,watermark_zl);disp('wugongji:');disp(NC)

Answer 1

[Image Analyst]

It seems like you must have a nan in your message array somewhere. Get rid of them by setting them to zero:

message(isnan(message) = 0; % Set NaN's to 0.
imshow(message, []);