Problem with shadow removal operation

Question

SHOBA MOHAN 2017-12-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/374741-problem-with-shadow-removal-operation

评论： SHOBA MOHAN 2017-12-29

inputoutputimage.pdf

I wrote matlab code for removing shadows but got the errorneous output. Can anyone please review my code and suggest the possible solutions. I am attaching the input output image and the reference paper is given in the link. <https://jivp-eurasipjournals.springeropen.com/articles/10.1186/s13640-017-0198-x >

function shadowremoval()
fontSize=14;
image=imread('inputimage.jpg');
image1=imread('foregroundimage.jpg');
image=imresize(image,[244 324]);
image1=imresize(image1,[244 324]);
% image=imresize(image,[406 646]);
          % Do color conversion from rgb to hsv
          x=rgb2hsv(image);
          y=rgb2hsv(image1);
          % Split the hsv component to h,s,v value
          Hx = x(:,:,1);
          Sx = x(:,:,2);
          Vx = x(:,:,3);
          Hy = y(:,:,1);
          Sy = y(:,:,2);
          Vy = y(:,:,3);
          % Calculate a difference between this frame and the background.
          dh=(abs(double(Hx) - double(Hy)));
          ds1=(abs(double(Sx) - double(Sy)));
          dv1=(abs(double(Vx) - double(Vy)));
          figure;
          subplot(3, 3, 1);
          imshow(image1, []);
          title('Inputimage', 'FontSize', fontSize);
          subplot(3, 3, 2);
          imshow(image, []);
          title('Referenceimage', 'FontSize', fontSize);
          subplot(3, 3, 3);
          imshow(dh, []);
          title('dh', 'FontSize', fontSize);
          subplot(3, 3, 4);
          imshow(ds1, []);
          title('ds1', 'FontSize', fontSize);
          subplot(3, 3, 5);
          imshow(dv1, []);
          title('dv1', 'FontSize', fontSize);
          de_shadow=cat(3,dh,ds1,dv1);
  %         
          % Perform the 'swt'
          [as,hs,vs,ds] = swt2(ds1,2,'haar');
          [av,hv,vv,dv] = swt2(dv1,2,'haar');
  %         
  %         %Compute the skewness value of 'swt of v'
          sav=skewness(av(:));
          shv=skewness(hv(:));
          svv=skewness(vv(:));
          sdv=skewness(dv(:));
          %Compute the skewness value of 'swt of s'
          sas=skewness(as(:));
          shs=skewness(hs(:));
          svs=skewness(vs(:));
          sds=skewness(ds(:));
%         %Perform the thresholding operation
         b=(av>=sav);
        c=(hv>=shv);
        d=(vv>=svv);
        e=(dv>=sdv);
%         
        f=(as>=sas);
        g=(hs>=shs);
        h=(vs>=svs);
        i=(ds>=sds);
%         
        j=(b&f);
        k=(c&g);
        l=(d&h);
        m=(e&i);
          %Perform the inverse 'swt'operation
          recv = iswt2(b,c,d,e,'haar');
          recs= iswt2(j,k,l,m,'haar');
          de_shadow1=cat(3,dh,recs,recv);
          subplot(3, 3, 6);
          imshow(de_shadow1, []);
          title('deshadow1', 'FontSize', fontSize);
          mask1=hsv2rgb(de_shadow1);
          mask=rgb2gray(mask1);
          mask=im2bw(mask);
          subplot(3, 3, 7);
          imshow(mask, []);
          title('Grayoutput', 'FontSize', fontSize);
          impixelinfo();
end