Shadow Removal Using Intensity Surfaces and Texture Anchor Points

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..

[salini]

any other suggestions plz..?

Answer 1

[Image Analyst]

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.

[Karbala'a Unvi. Science]

Dear Sir

I am in need of a code that works with Shadow detection for a prohect that I am working on.

Can you help me with that

[Image Analyst]

See attached paper. I don't have it translated into MATLAB code.

Or else search Vision Bib for it:

USC Annotated Computer Vision Bibliography

[Karbala'a Unvi. Science]

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);



 

[Image Analyst]

Running your code, we get this:

Error using VideoReader/initReader (line 734)

The filename specified was not found in the MATLAB path.

Error in audiovideo.internal.IVideoReader (line 136)

initReader(obj, fileName, currentTime);

Error in VideoReader (line 104)

[e-mail](varargin{:});

Error in test3 (line 4)

mov = VideoReader('car_s.avi');

So the problem is the car_s.avi file does not exist. You need to make sure it exists. And there may be more errors after that, but that's as far as I got.

[Karbala'a Unvi. Science]

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

[Image Analyst]

I don't have the shadow removal code. Did you get it from the paper authors? I think you should ask them, not me.