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how can i separte texte and background and compresse each one séparatelly (compression old image document)

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Adel Litim
Adel Litim 2020-5-11
关闭： MATLAB Answer Bot 2021-8-20
clear all;
close all;
clc;
f=imread('manuscrit1.tif'); %insérer the image.
imshow(f)
title('image originalle') %pour afficher l'image originale.
infos = whos('auto.tif');
fprintf('la taille de lmage originale est :' )
infos.bytes
%------------------------redimensionner l'image---------
BlockSize = 64; %la taille de chaque bloque
[rows1, columns1, numberOfColorChannels] = size(f);
e1=floor(rows1/BlockSize);
e2=floor(columns1/BlockSize);
h1 = e1*BlockSize;
h2 = e2*BlockSize;
J = imresize(f,[h1 h2]) ;
%----------------------------------------------------------------------
imgTSV=rgb2hsv(J); % pour tranformer l'image au systeme TSV
imshow(imgTSV)
title('en TSV') %pour afficher l'image originale.
%T Component of Colour Image
Tcom= imgTSV(:,:,1);
%S Component of Colour Image
Scom=imgTSV(:,:,2);
%V Component of Colour Image
Vcom=imgTSV(:,:,3);
%---------------------Dévision en block----------------------------------------
[rows, columns] = size(Tcom);
wholeBlockRows = floor(rows / BlockSize);
wholeBlockCols = floor(columns /BlockSize);
%---------------------dwt avec dévision------------------------
%--------------pour le composant T---------------------------
TOTAL_BLOCKS = wholeBlockRows*wholeBlockCols ;
dividedImage = zeros([BlockSize BlockSize TOTAL_BLOCKS]);
%-----_---------------------------------------------------------------------------------------------
T=BlockSize*wholeBlockCols;%on utilise ces parametre pour la partie de reconstuire l'image
image11=zeros(h1,h2,3); %create an rgb empty image
imgTSV1=rgb2hsv(image11);
Tcom1= imgTSV1(:,:,1)
%S Component of Colour Image %cette partie pour créer une image vide afin de réccuper l'avant plan
Scom1=imgTSV1(:,:,2);
%V Component of Colour Image
Vcom1=imgTSV1(:,:,3);
% pour récupeérer l'arrier plan
image22=zeros(h1,h2,3);
imgTSV2=rgb2hsv(image22);
Tcom11= imgTSV2(:,:,1);
%S Component of Colour Image
Scom11=imgTSV2(:,:,2);
%V Component of Colour Image
Vcom11=imgTSV2(:,:,3);
%---------------------------------------------------------------------------------------
row = 1;
col = 1;
%-----_---------------------------------------------------------------------------------------------
T=BlockSize*wholeBlockCols;%on utilise ces parametre pour la partie de reconstuire l'image
%---------------------------------------------------------------------------------------
for count=1:TOTAL_BLOCKS
dividedImage1(:,:,count) = Tcom(row:row+BlockSize-1,col:col+BlockSize-1);
col = col + BlockSize;
if(col >= size(Tcom,2))
col = 1;
row = row + BlockSize;
if(row >= size(Tcom,1))
row = 1;
end
end
%il est possible d'utiliser une forme simple de DWT mais la fonction BLOCKPLROC mieux pour bien préciser la taille de chaque BLOCK.
fun1 = @(block_struct) nth_output(1, @dwt2, block_struct.data,'db4');
fun2 = @(block_struct) nth_output(2, @dwt2, block_struct.data,'db4');
fun3 = @(block_struct) nth_output(3, @dwt2, block_struct.data,'db4');
fun4 = @(block_struct) nth_output(4, @dwt2, block_struct.data,'db4');
cAt = blockproc(dividedImage1(:,:,count),[BlockSize BlockSize],fun1);
cHt= blockproc(dividedImage1(:,:,count),[BlockSize BlockSize],fun2);
cVt= blockproc(dividedImage1(:,:,count),[BlockSize BlockSize],fun3);
cDt= blockproc(dividedImage1(:,:,count),[BlockSize BlockSize],fun4);
vt1=reshape(cHt,[],1); %pour regrouper la matrice LHt à un vecteur
vt2=reshape(cVt,[],1); %pour regrouper la matrice HLt à un vecteur
vt3=[vt1; vt2]; %pour linaisiser les deux premier HL et LH dans un seul vecteur
%--------------pour le composant S---------------------------
dividedImage2(:,:,count) = Scom(row:row+BlockSize-1,col:col+BlockSize-1);
col = col + BlockSize;
if(col >= size(Scom,2))
col = 1;
row = row + BlockSize;
if(row >= size(Scom,1))
row = 1;
end
end
fun5= @(block_struct) nth_output1(1, @dwt2, block_struct.data,'db4');
fun6 = @(block_struct) nth_output1(2, @dwt2, block_struct.data,'db4');
fun7= @(block_struct) nth_output1(3, @dwt2, block_struct.data,'db4');
fun8= @(block_struct) nth_output1(4, @dwt2, block_struct.data,'db4');
cAs= blockproc(dividedImage2(:,:,count),[BlockSize BlockSize],fun5);
cHs= blockproc(dividedImage2(:,:,count),[BlockSize BlockSize],fun6);
cVs= blockproc(dividedImage2(:,:,count),[BlockSize BlockSize],fun7);
cDs= blockproc(dividedImage2(:,:,count),[BlockSize BlockSize],fun8);
vs1=reshape(cHs,[],1); %pour regrouper la matrice LHt à un vecteur
vs2=reshape(cVs,[],1); %pour regrouper la matrice HLt à un vecteur
vs3=[vs1; vs2]; %pour linaisiser les deux premier HL et LH dans un seul vecteur
%--------------pour le composant V---------------------------
dividedImage3(:,:,count) = Vcom(row:row+BlockSize-1,col:col+BlockSize-1);
col = col + BlockSize;
if(col >= size(Vcom,2))
col = 1;
row = row + BlockSize;
if(row >= size(Vcom,1))
row = 1;
end
end
fun9= @(block_struct) nth_output2(1, @dwt2, block_struct.data,'db4');
fun10= @(block_struct) nth_output2(2, @dwt2, block_struct.data,'db4');
fun11= @(block_struct) nth_output2(3, @dwt2, block_struct.data,'db4');
fun12= @(block_struct) nth_output2(4, @dwt2, block_struct.data,'db4');
cAv= blockproc(dividedImage3(:,:,count),[BlockSize BlockSize],fun9);
cHv= blockproc(dividedImage3(:,:,count),[BlockSize BlockSize],fun10);
cVv= blockproc(dividedImage3(:,:,count),[BlockSize BlockSize],fun11);
cDv= blockproc(dividedImage3(:,:,count),[BlockSize BlockSize],fun12);
vv1=reshape(cHv,[],1); %pour regrouper la matrice LHt à un vecteur
vv2=reshape(cVv,[],1); %pour regrouper la matrice HLt à un vecteur
vv3=[vv1; vv2]; %pour linaisiser les deux premier HL et LH dans un seul vecteur
%-----------------on regroupe tout les HL et LH dans seul vector----------
vhr = [vt3; vs3; vv3] ;
%---------pour calculer la variance de chaque block-----------
vari = var(vhr)
%---------------------condition de seuil (threshold)---------------
seuil = 0.001 ; %inserer une valeur .
if (vari > seuil)
Av1 = dividedImage1(:,:,count) ;
Av2 = dividedImage2(:,:,count) ;
Av3 = dividedImage3(:,:,count) ;
%.-----------------reconstruire une image avant plant
if(count==1) %.-----------------reconstruire une image Tcom1
Tcom1(3:3+size(Av1,1), 3:3+size(Av1,2), :) = Av1;
else
v2=count-1;
Tcom1(BlockSize*v2+count:BlockSize*count,BlockSize*v2+count:BlockSize*count,:) = Av1;
end
if(count==1) %.-----------------reconstruire une image Tcom1
Scom1(1:BlockSize, 1:BlockSize, :) = Av2;
else
v2=count-1;
Tcom1(Blocksize*v2+count:BlockSize*count , Blocksize*v2+count:BlockSize*count, :) = Av2;
end
if(count==1) %.-----------------reconstruire une image Vcom1
Scom1(1:BlockSize, 1:BlockSize, :) = Av3;
else
v2=count-1;
Tcom3(Blocksize*v2+count:BlockSize*count , Blocksize*v2+count:BlockSize*count, :) = Av3;
end
else %--------reconstruire une image arriere plant
Av1 = dividedImage1(:,:,count) ;
Av2 = dividedImage2(:,:,count) ;
Av3 = dividedImage3(:,:,count) ;
if(count==1) %.-----------------reconstruire une image Tcom11
Tcom11(1:BlockSize, 1:BlockSize, :) = Av1;
else
v2=count-1;
Tcom11(Blocksize*v2+count:BlockSize*count , Blocksize*v2+count:BlockSize*count, :) = Av1;
end
if(count==1) %.-----------------reconstruire une image Tcom1
Scom11(1:BlockSize, 1:BlockSize, :) = Av2;
else
v2=count-1;
Scom11(Blocksize*v2+count:BlockSize*count , Blocksize*v2+count:BlockSize*count, :) = Av2;
end
if(count==1) %.-----------------reconstruire une image Tcom1
Vcom11(1:BlockSize, 1:BlockSize, :) = Av3;
else
v2=count-1;
Vcom11(Blocksize*v2+count:BlockSize*count , Blocksize*v2+count:BlockSize*count, :) = Av3;
end
end
end
tsvAVP= cat(3, Tcom1, Scom1, Vcom1); %pour aficher l'image avant plan
AVPimage=hsv2rgb(tsvAVP);
subplot(2,1,1)
imshow(AVPimage)
title('image avant plan')
tsvARP= cat(3, Tcom11, Scom11, Vcom11); %pour afficher l'image arriere plan
AVPimage=hsv2rgb(tsvARP);
subplot(2,1,2)
imshow(ARPimage)
title('image arriere plan')
  2 个评论
Image Analyst
Image Analyst 2020-5-11
Well, let's start by you attaching your image and your m-file. Then we can run your code and begin to help you. Also, please edit and format the code as code with the Code icon.
Adel Litim
Adel Litim 2020-5-11
Thanks a lot for your favorable response, first i want to séparate a background image and text image from a original document image, see project1.m, i use 3 function to generate BLOCKProC, my first probleme i can't get the backgound and the text image
there is a probleme to upload my image ( i should use a original image conting a text)

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