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dethighlightHZ.m
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dethighlightHZ.m
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function highlighted= dethighlightHZ(im,blocksize,detections)
%%%%%
% detections:predictlabel:0 or 1
% The purpose of this function is to highlight blocks which have been
% identified as tampered.
% written by Matthew C Stamm 4/09
%%%%%%%%%%%%%%%%%%%%%%
im = im';
rval = 255;bval = 0;gval = 0;
[rows cols colors]= size(im);
rowblocks = floor(rows/blocksize);
% caculate the number of blocks contained in the colnum
colblocks = floor(cols/blocksize);
% caculate the number of blocks contained in the rownum %cols/blocksize;
if colors == 1
newim(:,:,1)= im;
newim(:,:,2)= im;
newim(:,:,3)= im;
im = newim;
end
% pick red color layer for highlighting
highlighted= im;
for rowblock= 1:rowblocks
for colblock= 1:colblocks
if detections(rowblock,colblock) == 2
% Kmeans 结果里篡改部分（小的一簇）标签为2
rowst= (rowblock-1) * blocksize+ 1;
rowfin= rowblock * blocksize;
colst= (colblock-1) * blocksize + 1;
colfin= colblock * blocksize;
% red
highlighted(rowst:rowst+2,colst:colfin,1)= rval;
highlighted(rowfin-2:rowfin,colst:colfin,1)= rval;
highlighted(rowst:rowfin,colst:colst+2,1)= rval;
highlighted(rowst:rowfin,colfin-2:colfin,1)= rval;
% green
highlighted(rowst:rowst+2,colst:colfin,2)= gval;
highlighted(rowfin-2:rowfin,colst:colfin,2)= gval;
highlighted(rowst:rowfin,colst:colst+2,2)= gval;
highlighted(rowst:rowfin,colfin-2:colfin,2)= gval;
% blue
highlighted(rowst:rowst+2,colst:colfin,3)= bval;
highlighted(rowfin-2:rowfin,colst:colfin,3)= bval;
highlighted(rowst:rowfin,colst:colst+2,3)= bval;
highlighted(rowst:rowfin,colfin-2:colfin,3)= bval;
if rowst-1 > 0
highlighted(rowst-3:rowst-1,colst:colfin,1)= rval;
highlighted(rowst-3:rowst-1,colst:colfin,2)= gval;
highlighted(rowst-3:rowst-1,colst:colfin,3)= bval;
if colst-1 > 0
highlighted(rowst-3:rowst-1,colst-3:colst-1,1)= rval;
highlighted(rowst-3:rowst-1,colst-3:colst-1,2)= gval;
highlighted(rowst-3:rowst-1,colst-3:colst-1,3)= bval;
end
if colfin+1 < cols
highlighted(rowst-3:rowst-1,colfin+1:colfin+3,1)= rval;
highlighted(rowst-3:rowst-1,colfin+1:colfin+3,2)= gval;
highlighted(rowst-3:rowst-1,colfin+1:colfin+3,3)= bval;
end
end
if rowfin+1 < rows
highlighted(rowfin+1:rowfin+3,colst:colfin,1)= rval;
highlighted(rowfin+1:rowfin+3,colst:colfin,2)= gval;
highlighted(rowfin+1:rowfin+3,colst:colfin,3)= bval;
if colst-1 > 0
highlighted(rowfin+1:rowfin+3,colst-3:colst-1,1)= rval;
highlighted(rowfin+1:rowfin+3,colst-3:colst-1,2)= gval;
highlighted(rowfin+1:rowfin+3,colst-3:colst-1,3)= bval;
end
if colfin+1 < cols
highlighted(rowfin+1:rowfin+3,colfin+1:colfin+3,1)= rval;
highlighted(rowfin+1:rowfin+3,colfin+1:colfin+3,2)= gval;
highlighted(rowfin+1:rowfin+3,colfin+1:colfin+3,3)= bval;
end
end
if colst-1 > 0
highlighted(rowst:rowfin,colst-3:colst-1,1)= rval;
highlighted(rowst:rowfin,colst-3:colst-1,2)= gval;
highlighted(rowst:rowfin,colst-3:colst-1,3)= bval;
end
if colfin+1 < cols
highlighted(rowst:rowfin,colfin+1:colfin+3,1)= rval;
highlighted(rowst:rowfin,colfin+1:colfin+3,2)= gval;
highlighted(rowst:rowfin,colfin+1:colfin+3,3)= bval;
end
end
end
end
highlighted= uint8(highlighted);
highlighted_temp(:,:,1)= highlighted(:,:,1)';
highlighted_temp(:,:,2)= highlighted(:,:,2)';
highlighted_temp(:,:,3)= highlighted(:,:,3)';
highlighted= highlighted_temp;
% figure,imshow(highlighted);
figure,
imshow(highlighted,'Border','tight');