Shadow Removal Using Intensity Surfaces and Texture Anchor Points

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salini 2011-10-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/17271-shadow-removal-using-intensity-surfaces-and-texture-anchor-points

评论： Image Analyst 2020-10-13

I am working on removal of shadows from a single image.The shadows from the image must be detected first and then it has to removed. Currently i am using region growing technique for detecting the shadow. Is there any other method for this? plz help me out..

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salini 2011-10-18

any other suggestions plz..?

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Answer 1

Image Analyst 2011-10-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/17271-shadow-removal-using-intensity-surfaces-and-texture-anchor-points#answer_23280

This seems more like an image processing question than a MATLAB question. Maybe you should try the sci.image.processing newsgroup, because there's nothing "built into" MATLAB to do shadow removal. If you have some question about code, for example you coded up this algorithm: http://www.cs.huji.ac.il/~danix/ShadowRemoval/index.html then this forum might help you with coding questions.

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Karbala'a Unvi. Science 2020-10-13

在 MATLAB Online 中打开

I did read about that but what i am asking is what is the chance that you can help me in writing a code for detection. not removing but only detection

I will send my a try for a code

can you correct the error that I maade in that code

Pleas need the help as soon as you get this message

Thank you in advance

Z.

clc 
clear  
mov = VideoReader('car_s.avi');
path1='ziad\VideoFrame\';
path2='ziad\cfhue\';
path3='ziad\cfsatur\';
path4='ziad\cfValue\';
path5='ziad\imagesinRGB\';
mkdir(path1);
mkdir(path2);
mkdir(path3);
mkdir(path4);
mkdir(path5);
alphaV=-0.2;
betaV=-0.8;
[m,n]=size(mov);
single=zeros(m,n);
%%
n=0;
while hasFrame(mov)
    frame = readFrame(mov);
    pf5=strcat(path5,num2str(n),'.jpg');
    imwrite(frame,pf5)
    bac=imread('C:\Users\Dr.Zee\Desktop\Shadow detection\ziad\imagesinRGB\23.jpg');
    backhsv=rgb2hsv(bac);
    backhue =backhsv(:,:,1);
    backsat =backhsv(:,:,2);
    backVal =backhsv(:,:,3);
    im=rgb2hsv(frame);
    pf1=strcat(path1,num2str(n),'.jpg');
    
%     figure(1)
%     imshow(im);
    n=n+1;
    imwrite(im,pf1)
   cfhue=im(:,:,1);
     pf2=strcat(path2,num2str(n),'.jpg');imwrite(cfhue,pf2) 
      cfsat=im(:,:,2);
     pf3=strcat(path3,num2str(n),'.jpg');imwrite(cfsat,pf3)
      cfval=im(:,:,3);
     pf4=strcat(path4,num2str(n),'.jpg'); imwrite(cfval,pf4)
        
    w= cfval / backVal;
    sat=cfsat - backsat;
    hue=cfhue - backhue;
      if( w>=alphaV : w<=betaV  : sat<=-0.3 : hue <=0.2)
           single=1; 
        else
            single=0;
     end
 end
imshow(single);
 

Karbala'a Unvi. Science 2020-10-13

the video is located at the file directory and evrything is working properlay fine, but the (if ) statement is not finding the shadows requaiered. I can't send the video in here but you can findout any other videi with shawdos from the internet

thank you for you quick respoon