Error undefined function while it is already defined

Question

Ali Purse 2018-10-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/426051-error-undefined-function-while-it-is-already-defined

编辑： Stephen23 2018-10-25

Hi

I got undefined function while using the following function:

function nearest_neighbor_zoom(file,fac)
    im=imread(file);
    [h,v]=size(im);
    for i=1:h
        for j=1:v
        im1( floor(1+(i-1)*fac), floor(1+(j-1)*fac),:)=im(i,j); %mapping pixels of given image to a new array so that zooming factor is satisfied. 
        end  
    end
    [h1,v1]=size(im1);
    disp('Unknown pixel values are being interpolated. Look at Figure1');
%nearest neighbor interpolation
    for i=1:h1-1 
        for j=1:v1-1  
                 if(  (floor( 1+(    ceil((i-1)/fac+1)    -1)*fac )==i)  && ( floor( 1+(    ceil((j-1)/fac+1)    -1)*fac )==j )  ) % maped values from the original picture should not be recalculated.     
                 else  %for pixels that should be calculated    
                 if(floor( 1+(    ceil((i-1)/fac+1)    -1)*fac )==i) %on a defined vertical level
                     xo00=ceil((i-1)/fac+1);
                     x00=i;
                 else
                     xo00=floor((i-1)/fac+1); 
                     x00=floor(1+(xo00-1)*fac);
                 end
                 if( floor( 1+(    ceil((j-1)/fac+1)    -1)*fac )==j )%on a defined horizontal level
                     yo00=ceil((j-1)/fac+1);
                     y00=j;
                 else
                     yo00=floor((j-1)/fac+1);
                     y00=floor(1+(yo00-1)*fac);
                 end                  
                xo10=xo00+1;
                yo10=yo00;
                x10=floor(1+(xo10-1)*fac); %current coordinate of 10;
                y10=floor(1+(yo10-1)*fac);
                xo01=xo00;
                yo01=yo00+1;
                x01=floor(1+(xo01-1)*fac); %current coordinate of 01;
                y01=floor(1+(yo01-1)*fac);
                xo11=xo10;
                yo11=yo01;
                x11=x10; %current coordinate of 11;
                y11=y01;          
                xlen=x11-x00;
                ylen=y11-y00;
                x=i-x00;
                y=j-y00;
                dx=x/xlen; %converting coordinates of the pixel being calculated to (0*1)(0*1) domain.
                dy=y/ylen;          
                 if dx<=0.5 %if the pixel being calculated is near to the known upper pixel level. 
                     nx=0; 
                 else  %to known lower pixel level.
                     nx=1;
                 end
                 if dy<=0.5 %if the pixel being calculated is near to the known left pixel level.
                 ny=0;
                 else  %to known right pixel level.
                 ny=1; 
                 end  
                 if ((nx==0) &&(ny==0)) %assigning the upper left known pixel to the pixel being calculated.
                     h00=im1(x00,y00,:);
                     im1(i,j,:)=h00;
                 elseif ((nx==1) && (ny==0)) %assigning the lower left known pixel to the pixel being calculated.
                     h10=im1(x10,y10,:);
                     im1(i,j,:)=h10;
                 elseif((nx==0) && (ny==1)) %assigning the upper right known pixel to the pixel being calculated.
                      h01=im1( x01,y01,:);
                     im1(i,j,:)=h01;
                 elseif((nx==1)&&(ny==1)) %assigning the lower right known pixel to the pixel being calculated.
                     h11=im1(x11,y11,:);
                     im1(i,j,:)=h11;
                 end
             end
          end
        imshow(im1); %displaying image being interpolated.
      end
      disp('Zooming is complet. Look at Figure1');
      imshow(im1);
      imwrite(im1,'zoomed_pic.jpg');
  end