@inproceedings{conf/wifs/HolubF12,
added-at = {2013-01-23T00:00:00.000+0100},
author = {Holub, Vojtech and Fridrich, Jessica J.},
- biburl = {http://www.bibsonomy.org/bibtex/2a685b4b8b521ac99734fb52c064ca994/dblp},
- booktitle = {WIFS},
- crossref = {conf/wifs/2012},
+ booktitle = {2012 {IEEE} International Workshop on Information Forensics and Security, Tenerife, Spain},
+ month = dec,
ee = {http://dx.doi.org/10.1109/WIFS.2012.6412655},
interhash = {cbef658a6868216eef585dd759ae0668},
intrahash = {a685b4b8b521ac99734fb52c064ca994},
+
@article{FillerJF11,
author = {Tom{\'a}s Filler and
Jan Judas and
metrics, which is in $\theta(686)$. Computing the distance is thus in
$\theta(2\times 343^2)$ and this modification
is thus in $\theta(2\times 343^2 \times n^2)$.
-Ranking these results may be achieved with an insertion sort, which is in
-$2 \times n^2 \ln(n)$.
+Ranking these results may be achieved with a quick sort, which is in
+$\theta(2 \times n^2 \ln(n))$ for data of size $n^2$.
The overall complexity of the pixel selection is finally
$\theta(n^2 +2 \times 343^2 + 2\times 343^2 \times n^2 + 2 \times n^2 \ln(n))$, \textit{i.e},
$\theta(2 \times n^2(343^2 + \ln(n)))$.
--- /dev/null
+%!PS-Adobe-3.0
+%%Creator: graphviz version 2.36.0 (20140111.2315)
+%%Title: start_up
+%%Pages: (atend)
+%%BoundingBox: (atend)
+%%EndComments
+save
+%%BeginProlog
+/DotDict 200 dict def
+DotDict begin
+
+/setupLatin1 {
+mark
+/EncodingVector 256 array def
+ EncodingVector 0
+
+ISOLatin1Encoding 0 255 getinterval putinterval
+EncodingVector 45 /hyphen put
+
+% Set up ISO Latin 1 character encoding
+/starnetISO {
+ dup dup findfont dup length dict begin
+ { 1 index /FID ne { def }{ pop pop } ifelse
+ } forall
+ /Encoding EncodingVector def
+ currentdict end definefont
+} def
+/Times-Roman starnetISO def
+/Times-Italic starnetISO def
+/Times-Bold starnetISO def
+/Times-BoldItalic starnetISO def
+/Helvetica starnetISO def
+/Helvetica-Oblique starnetISO def
+/Helvetica-Bold starnetISO def
+/Helvetica-BoldOblique starnetISO def
+/Courier starnetISO def
+/Courier-Oblique starnetISO def
+/Courier-Bold starnetISO def
+/Courier-BoldOblique starnetISO def
+cleartomark
+} bind def
+
+%%BeginResource: procset graphviz 0 0
+/coord-font-family /Times-Roman def
+/default-font-family /Times-Roman def
+/coordfont coord-font-family findfont 8 scalefont def
+
+/InvScaleFactor 1.0 def
+/set_scale {
+ dup 1 exch div /InvScaleFactor exch def
+ scale
+} bind def
+
+% styles
+/solid { [] 0 setdash } bind def
+/dashed { [9 InvScaleFactor mul dup ] 0 setdash } bind def
+/dotted { [1 InvScaleFactor mul 6 InvScaleFactor mul] 0 setdash } bind def
+/invis {/fill {newpath} def /stroke {newpath} def /show {pop newpath} def} bind def
+/bold { 2 setlinewidth } bind def
+/filled { } bind def
+/unfilled { } bind def
+/rounded { } bind def
+/diagonals { } bind def
+/tapered { } bind def
+
+% hooks for setting color
+/nodecolor { sethsbcolor } bind def
+/edgecolor { sethsbcolor } bind def
+/graphcolor { sethsbcolor } bind def
+/nopcolor {pop pop pop} bind def
+
+/beginpage { % i j npages
+ /npages exch def
+ /j exch def
+ /i exch def
+ /str 10 string def
+ npages 1 gt {
+ gsave
+ coordfont setfont
+ 0 0 moveto
+ (\() show i str cvs show (,) show j str cvs show (\)) show
+ grestore
+ } if
+} bind def
+
+/set_font {
+ findfont exch
+ scalefont setfont
+} def
+
+% draw text fitted to its expected width
+/alignedtext { % width text
+ /text exch def
+ /width exch def
+ gsave
+ width 0 gt {
+ [] 0 setdash
+ text stringwidth pop width exch sub text length div 0 text ashow
+ } if
+ grestore
+} def
+
+/boxprim { % xcorner ycorner xsize ysize
+ 4 2 roll
+ moveto
+ 2 copy
+ exch 0 rlineto
+ 0 exch rlineto
+ pop neg 0 rlineto
+ closepath
+} bind def
+
+/ellipse_path {
+ /ry exch def
+ /rx exch def
+ /y exch def
+ /x exch def
+ matrix currentmatrix
+ newpath
+ x y translate
+ rx ry scale
+ 0 0 1 0 360 arc
+ setmatrix
+} bind def
+
+/endpage { showpage } bind def
+/showpage { } def
+
+/layercolorseq
+ [ % layer color sequence - darkest to lightest
+ [0 0 0]
+ [.2 .8 .8]
+ [.4 .8 .8]
+ [.6 .8 .8]
+ [.8 .8 .8]
+ ]
+def
+
+/layerlen layercolorseq length def
+
+/setlayer {/maxlayer exch def /curlayer exch def
+ layercolorseq curlayer 1 sub layerlen mod get
+ aload pop sethsbcolor
+ /nodecolor {nopcolor} def
+ /edgecolor {nopcolor} def
+ /graphcolor {nopcolor} def
+} bind def
+
+/onlayer { curlayer ne {invis} if } def
+
+/onlayers {
+ /myupper exch def
+ /mylower exch def
+ curlayer mylower lt
+ curlayer myupper gt
+ or
+ {invis} if
+} def
+
+/curlayer 0 def
+
+%%EndResource
+%%EndProlog
+%%BeginSetup
+14 default-font-family set_font
+1 setmiterlimit
+% /arrowlength 10 def
+% /arrowwidth 5 def
+
+% make sure pdfmark is harmless for PS-interpreters other than Distiller
+/pdfmark where {pop} {userdict /pdfmark /cleartomark load put} ifelse
+% make '<<' and '>>' safe on PS Level 1 devices
+/languagelevel where {pop languagelevel}{1} ifelse
+2 lt {
+ userdict (<<) cvn ([) cvn load put
+ userdict (>>) cvn ([) cvn load put
+} if
+
+%%EndSetup
+setupLatin1
+%%Page: 1 1
+%%PageBoundingBox: 36 36 322 538
+%%PageOrientation: Portrait
+0 0 1 beginpage
+gsave
+36 36 286 502 boxprim clip newpath
+1 1 set_scale 0 rotate 40 40 translate
+% SI
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 199.25 420 moveto
+199.25 420 124.75 420 124.75 420 curveto
+118.75 420 112.75 414 112.75 408 curveto
+112.75 408 112.75 396 112.75 396 curveto
+112.75 390 118.75 384 124.75 384 curveto
+124.75 384 199.25 384 199.25 384 curveto
+205.25 384 211.25 390 211.25 396 curveto
+211.25 396 211.25 408 211.25 408 curveto
+211.25 414 205.25 420 199.25 420 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+120.5 398.3 moveto 83 (Stego Image Y) alignedtext
+grestore
+% ED
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 203.25 346 moveto
+203.25 346 70.75 346 70.75 346 curveto
+64.75 346 58.75 340 58.75 334 curveto
+58.75 334 58.75 322 58.75 322 curveto
+58.75 316 64.75 310 70.75 310 curveto
+70.75 310 203.25 310 203.25 310 curveto
+209.25 310 215.25 316 215.25 322 curveto
+215.25 322 215.25 334 215.25 334 curveto
+215.25 340 209.25 346 203.25 346 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+66.5 324.3 moveto 141 (y=Edge Detection\(b,T,Y\)) alignedtext
+grestore
+% SI->ED
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 156.08 383.94 moveto
+153.19 375.63 149.65 365.44 146.41 356.11 curveto
+stroke
+0 0 0 edgecolor
+newpath 149.64 354.74 moveto
+143.06 346.44 lineto
+143.03 357.04 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 149.64 354.74 moveto
+143.06 346.44 lineto
+143.03 357.04 lineto
+closepath stroke
+grestore
+% PIb
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 82.25 420 moveto
+82.25 420 11.75 420 11.75 420 curveto
+5.75 420 -.25 414 -.25 408 curveto
+-.25 408 -.25 396 -.25 396 curveto
+-.25 390 5.75 384 11.75 384 curveto
+11.75 384 82.25 384 82.25 384 curveto
+88.25 384 94.25 390 94.25 396 curveto
+94.25 396 94.25 408 94.25 408 curveto
+94.25 414 88.25 420 82.25 420 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+7.5 398.3 moveto 79 (Param b, T, H) alignedtext
+grestore
+% STC
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 100.5 184 moveto
+100.5 184 23.5 184 23.5 184 curveto
+17.5 184 11.5 178 11.5 172 curveto
+11.5 172 11.5 160 11.5 160 curveto
+11.5 154 17.5 148 23.5 148 curveto
+23.5 148 100.5 148 100.5 148 curveto
+106.5 148 112.5 154 112.5 160 curveto
+112.5 160 112.5 172 112.5 172 curveto
+112.5 178 106.5 184 100.5 184 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+19 162.3 moveto 86 (m = STCr\(y,H\)) alignedtext
+grestore
+% PIb->STC
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 46.22 383.6 moveto
+45.09 353.46 43.67 289.59 49 236 curveto
+50.39 222.07 53.14 206.75 55.77 194.09 curveto
+stroke
+0 0 0 edgecolor
+newpath 59.22 194.69 moveto
+57.9 184.18 lineto
+52.37 193.22 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 59.22 194.69 moveto
+57.9 184.18 lineto
+52.37 193.22 lineto
+closepath stroke
+grestore
+% PIb->ED
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 68.33 383.94 moveto
+80.01 374.59 94.67 362.86 107.44 352.65 curveto
+stroke
+0 0 0 edgecolor
+newpath 109.89 355.17 moveto
+115.51 346.19 lineto
+105.52 349.7 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 109.89 355.17 moveto
+115.51 346.19 lineto
+105.52 349.7 lineto
+closepath stroke
+grestore
+% key
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 266 272 moveto
+266 272 236 272 236 272 curveto
+230 272 224 266 224 260 curveto
+224 260 224 248 224 248 curveto
+224 242 230 236 236 236 curveto
+236 236 266 236 266 236 curveto
+272 236 278 242 278 248 curveto
+278 248 278 260 278 260 curveto
+278 266 272 272 266 272 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+234 250.3 moveto 34 (Key k) alignedtext
+grestore
+% decrypt
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 239.25 110 moveto
+239.25 110 114.75 110 114.75 110 curveto
+108.75 110 102.75 104 102.75 98 curveto
+102.75 98 102.75 86 102.75 86 curveto
+102.75 80 108.75 74 114.75 74 curveto
+114.75 74 239.25 74 239.25 74 curveto
+245.25 74 251.25 80 251.25 86 curveto
+251.25 86 251.25 98 251.25 98 curveto
+251.25 104 245.25 110 239.25 110 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+110.5 88.3 moveto 133 (message=decryption\(m\)) alignedtext
+grestore
+% key->decrypt
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 250.73 235.64 moveto
+249.74 213.96 245.8 176.28 231 148 curveto
+224.99 136.51 215.79 125.85 206.69 117.02 curveto
+stroke
+0 0 0 edgecolor
+newpath 208.86 114.26 moveto
+199.13 110.06 lineto
+204.11 119.41 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 208.86 114.26 moveto
+199.13 110.06 lineto
+204.11 119.41 lineto
+closepath stroke
+grestore
+% sample
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 210.25 184 moveto
+210.25 184 143.75 184 143.75 184 curveto
+137.75 184 131.75 178 131.75 172 curveto
+131.75 172 131.75 160 131.75 160 curveto
+131.75 154 137.75 148 143.75 148 curveto
+143.75 148 210.25 148 210.25 148 curveto
+216.25 148 222.25 154 222.25 160 curveto
+222.25 160 222.25 172 222.25 172 curveto
+222.25 178 216.25 184 210.25 184 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+139.5 162.3 moveto 75 (m=sample\(y\)) alignedtext
+grestore
+% key->sample
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 236.02 235.6 moveto
+225.22 223.04 210.48 205.91 198.43 191.91 curveto
+stroke
+0 0 0 edgecolor
+newpath 200.88 189.38 moveto
+191.7 184.08 lineto
+195.57 193.95 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 200.88 189.38 moveto
+191.7 184.08 lineto
+195.57 193.95 lineto
+closepath stroke
+grestore
+% start
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 177 494 moveto
+177 494 147 494 147 494 curveto
+141 494 135 488 135 482 curveto
+135 482 135 470 135 470 curveto
+135 464 141 458 147 458 curveto
+147 458 177 458 177 458 curveto
+183 458 189 464 189 470 curveto
+189 470 189 482 189 482 curveto
+189 488 183 494 177 494 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+149 472.3 moveto 26 (Start) alignedtext
+grestore
+% start->SI
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 162 457.94 moveto
+162 449.81 162 439.88 162 430.7 curveto
+stroke
+0 0 0 edgecolor
+newpath 165.5 430.44 moveto
+162 420.44 lineto
+158.5 430.44 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 165.5 430.44 moveto
+162 420.44 lineto
+158.5 430.44 lineto
+closepath stroke
+grestore
+% start->PIb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 134.75 457.94 moveto
+119.39 448.32 100.01 436.19 83.37 425.77 curveto
+stroke
+0 0 0 edgecolor
+newpath 84.79 422.53 moveto
+74.46 420.19 lineto
+81.07 428.46 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 84.79 422.53 moveto
+74.46 420.19 lineto
+81.07 428.46 lineto
+closepath stroke
+grestore
+% start->key
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 186.38 457.79 moveto
+198.35 448.05 211.9 434.87 220 420 curveto
+244.03 375.89 249.76 316.39 250.93 282.21 curveto
+stroke
+0 0 0 edgecolor
+newpath 254.43 282.13 moveto
+251.17 272.06 lineto
+247.44 281.97 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 254.43 282.13 moveto
+251.17 272.06 lineto
+247.44 281.97 lineto
+closepath stroke
+grestore
+% end
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 192 36 moveto
+192 36 162 36 162 36 curveto
+156 36 150 30 150 24 curveto
+150 24 150 12 150 12 curveto
+150 6 156 0 162 0 curveto
+162 0 192 0 192 0 curveto
+198 0 204 6 204 12 curveto
+204 12 204 24 204 24 curveto
+204 30 198 36 192 36 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+166 14.3 moveto 22 (End) alignedtext
+grestore
+% STC->decrypt
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 89.25 147.94 moveto
+104.61 138.32 123.99 126.19 140.63 115.77 curveto
+stroke
+0 0 0 edgecolor
+newpath 142.93 118.46 moveto
+149.54 110.19 lineto
+139.21 112.53 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 142.93 118.46 moveto
+149.54 110.19 lineto
+139.21 112.53 lineto
+closepath stroke
+grestore
+% condEmb
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 132 272 moveto
+57.82 254 lineto
+132 236 lineto
+206.18 254 lineto
+closepath stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+99.5 250.3 moveto 65 (Use of STC) alignedtext
+grestore
+% ED->condEmb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 135.82 309.94 moveto
+135.24 301.6 134.53 291.36 133.87 282 curveto
+stroke
+0 0 0 edgecolor
+newpath 137.36 281.67 moveto
+133.18 271.94 lineto
+130.38 282.16 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 137.36 281.67 moveto
+133.18 271.94 lineto
+130.38 282.16 lineto
+closepath stroke
+grestore
+% decrypt->end
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 177 73.94 moveto
+177 65.81 177 55.88 177 46.7 curveto
+stroke
+0 0 0 edgecolor
+newpath 180.5 46.44 moveto
+177 36.44 lineto
+173.5 46.44 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 180.5 46.44 moveto
+177 36.44 lineto
+173.5 46.44 lineto
+closepath stroke
+grestore
+% condEmb->STC
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 120.44 238.8 moveto
+110.15 226.16 94.86 207.38 82.5 192.19 curveto
+stroke
+0 0 0 edgecolor
+newpath 85.02 189.73 moveto
+75.99 184.19 lineto
+79.59 194.15 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 85.02 189.73 moveto
+75.99 184.19 lineto
+79.59 194.15 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+104 206.3 moveto 22 (Yes) alignedtext
+grestore
+% condEmb->sample
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 140.05 237.62 moveto
+146.52 225.26 155.75 207.61 163.37 193.05 curveto
+stroke
+0 0 0 edgecolor
+newpath 166.56 194.49 moveto
+168.1 184.01 lineto
+160.36 191.25 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 166.56 194.49 moveto
+168.1 184.01 lineto
+160.36 191.25 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+159 206.3 moveto 17 (No) alignedtext
+grestore
+% sample->decrypt
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 177 147.94 moveto
+177 139.81 177 129.88 177 120.7 curveto
+stroke
+0 0 0 edgecolor
+newpath 180.5 120.44 moveto
+177 110.44 lineto
+173.5 120.44 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 180.5 120.44 moveto
+177 110.44 lineto
+173.5 120.44 lineto
+closepath stroke
+grestore
+endpage
+showpage
+grestore
+%%PageTrailer
+%%EndPage: 1
+%%Trailer
+%%Pages: 1
+%%BoundingBox: 36 36 322 538
+end
+restore
+%%EOF
--- /dev/null
+%!PS-Adobe-3.0
+%%Creator: graphviz version 2.36.0 (20140111.2315)
+%%Title: start_up
+%%Pages: (atend)
+%%BoundingBox: (atend)
+%%EndComments
+save
+%%BeginProlog
+/DotDict 200 dict def
+DotDict begin
+
+/setupLatin1 {
+mark
+/EncodingVector 256 array def
+ EncodingVector 0
+
+ISOLatin1Encoding 0 255 getinterval putinterval
+EncodingVector 45 /hyphen put
+
+% Set up ISO Latin 1 character encoding
+/starnetISO {
+ dup dup findfont dup length dict begin
+ { 1 index /FID ne { def }{ pop pop } ifelse
+ } forall
+ /Encoding EncodingVector def
+ currentdict end definefont
+} def
+/Times-Roman starnetISO def
+/Times-Italic starnetISO def
+/Times-Bold starnetISO def
+/Times-BoldItalic starnetISO def
+/Helvetica starnetISO def
+/Helvetica-Oblique starnetISO def
+/Helvetica-Bold starnetISO def
+/Helvetica-BoldOblique starnetISO def
+/Courier starnetISO def
+/Courier-Oblique starnetISO def
+/Courier-Bold starnetISO def
+/Courier-BoldOblique starnetISO def
+cleartomark
+} bind def
+
+%%BeginResource: procset graphviz 0 0
+/coord-font-family /Times-Roman def
+/default-font-family /Times-Roman def
+/coordfont coord-font-family findfont 8 scalefont def
+
+/InvScaleFactor 1.0 def
+/set_scale {
+ dup 1 exch div /InvScaleFactor exch def
+ scale
+} bind def
+
+% styles
+/solid { [] 0 setdash } bind def
+/dashed { [9 InvScaleFactor mul dup ] 0 setdash } bind def
+/dotted { [1 InvScaleFactor mul 6 InvScaleFactor mul] 0 setdash } bind def
+/invis {/fill {newpath} def /stroke {newpath} def /show {pop newpath} def} bind def
+/bold { 2 setlinewidth } bind def
+/filled { } bind def
+/unfilled { } bind def
+/rounded { } bind def
+/diagonals { } bind def
+/tapered { } bind def
+
+% hooks for setting color
+/nodecolor { sethsbcolor } bind def
+/edgecolor { sethsbcolor } bind def
+/graphcolor { sethsbcolor } bind def
+/nopcolor {pop pop pop} bind def
+
+/beginpage { % i j npages
+ /npages exch def
+ /j exch def
+ /i exch def
+ /str 10 string def
+ npages 1 gt {
+ gsave
+ coordfont setfont
+ 0 0 moveto
+ (\() show i str cvs show (,) show j str cvs show (\)) show
+ grestore
+ } if
+} bind def
+
+/set_font {
+ findfont exch
+ scalefont setfont
+} def
+
+% draw text fitted to its expected width
+/alignedtext { % width text
+ /text exch def
+ /width exch def
+ gsave
+ width 0 gt {
+ [] 0 setdash
+ text stringwidth pop width exch sub text length div 0 text ashow
+ } if
+ grestore
+} def
+
+/boxprim { % xcorner ycorner xsize ysize
+ 4 2 roll
+ moveto
+ 2 copy
+ exch 0 rlineto
+ 0 exch rlineto
+ pop neg 0 rlineto
+ closepath
+} bind def
+
+/ellipse_path {
+ /ry exch def
+ /rx exch def
+ /y exch def
+ /x exch def
+ matrix currentmatrix
+ newpath
+ x y translate
+ rx ry scale
+ 0 0 1 0 360 arc
+ setmatrix
+} bind def
+
+/endpage { showpage } bind def
+/showpage { } def
+
+/layercolorseq
+ [ % layer color sequence - darkest to lightest
+ [0 0 0]
+ [.2 .8 .8]
+ [.4 .8 .8]
+ [.6 .8 .8]
+ [.8 .8 .8]
+ ]
+def
+
+/layerlen layercolorseq length def
+
+/setlayer {/maxlayer exch def /curlayer exch def
+ layercolorseq curlayer 1 sub layerlen mod get
+ aload pop sethsbcolor
+ /nodecolor {nopcolor} def
+ /edgecolor {nopcolor} def
+ /graphcolor {nopcolor} def
+} bind def
+
+/onlayer { curlayer ne {invis} if } def
+
+/onlayers {
+ /myupper exch def
+ /mylower exch def
+ curlayer mylower lt
+ curlayer myupper gt
+ or
+ {invis} if
+} def
+
+/curlayer 0 def
+
+%%EndResource
+%%EndProlog
+%%BeginSetup
+14 default-font-family set_font
+1 setmiterlimit
+% /arrowlength 10 def
+% /arrowwidth 5 def
+
+% make sure pdfmark is harmless for PS-interpreters other than Distiller
+/pdfmark where {pop} {userdict /pdfmark /cleartomark load put} ifelse
+% make '<<' and '>>' safe on PS Level 1 devices
+/languagelevel where {pop languagelevel}{1} ifelse
+2 lt {
+ userdict (<<) cvn ([) cvn load put
+ userdict (>>) cvn ([) cvn load put
+} if
+
+%%EndSetup
+setupLatin1
+%%Page: 1 1
+%%PageBoundingBox: 36 36 577 680
+%%PageOrientation: Portrait
+0 0 1 beginpage
+gsave
+36 36 541 644 boxprim clip newpath
+1 1 set_scale 0 rotate 40 40 translate
+% PI
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 92 562 moveto
+92 562 12 562 12 562 curveto
+6 562 0 556 0 550 curveto
+0 550 0 538 0 538 curveto
+0 532 6 526 12 526 curveto
+12 526 92 526 92 526 curveto
+98 526 104 532 104 538 curveto
+104 538 104 550 104 550 curveto
+104 556 98 562 92 562 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+8 540.3 moveto 88 (Choose cover X) alignedtext
+grestore
+% ED
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 199.25 488 moveto
+199.25 488 66.75 488 66.75 488 curveto
+60.75 488 54.75 482 54.75 476 curveto
+54.75 476 54.75 464 54.75 464 curveto
+54.75 458 60.75 452 66.75 452 curveto
+66.75 452 199.25 452 199.25 452 curveto
+205.25 452 211.25 458 211.25 464 curveto
+211.25 464 211.25 476 211.25 476 curveto
+211.25 482 205.25 488 199.25 488 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+62.5 466.3 moveto 141 (x=Edge Detection\(b,T,X\)) alignedtext
+grestore
+% PI->ED
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 71.2 525.94 moveto
+81.61 516.68 94.65 505.09 106.07 494.94 curveto
+stroke
+0 0 0 edgecolor
+newpath 108.51 497.45 moveto
+113.66 488.19 lineto
+103.86 492.22 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 108.51 497.45 moveto
+113.66 488.19 lineto
+103.86 492.22 lineto
+closepath stroke
+grestore
+% PIb
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 174 562 moveto
+174 562 134 562 134 562 curveto
+128 562 122 556 122 550 curveto
+122 550 122 538 122 538 curveto
+122 532 128 526 134 526 curveto
+134 526 174 526 174 526 curveto
+180 526 186 532 186 538 curveto
+186 538 186 550 186 550 curveto
+186 556 180 562 174 562 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+130 540.3 moveto 48 (Set b, T ) alignedtext
+grestore
+% PIb->ED
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 149.02 525.94 moveto
+146.6 517.63 143.63 507.44 140.91 498.11 curveto
+stroke
+0 0 0 edgecolor
+newpath 144.25 497.06 moveto
+138.09 488.44 lineto
+137.53 499.02 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 144.25 497.06 moveto
+138.09 488.44 lineto
+137.53 499.02 lineto
+closepath stroke
+grestore
+% message
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 288 562 moveto
+288 562 216 562 216 562 curveto
+210 562 204 556 204 550 curveto
+204 550 204 538 204 538 curveto
+204 532 210 526 216 526 curveto
+216 526 288 526 288 526 curveto
+294 526 300 532 300 538 curveto
+300 538 300 550 300 550 curveto
+300 556 294 562 288 562 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+212 540.3 moveto 80 (Message mess) alignedtext
+grestore
+% encrypt
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 358.25 488 moveto
+358.25 488 241.75 488 241.75 488 curveto
+235.75 488 229.75 482 229.75 476 curveto
+229.75 476 229.75 464 229.75 464 curveto
+229.75 458 235.75 452 241.75 452 curveto
+241.75 452 358.25 452 358.25 452 curveto
+364.25 452 370.25 458 370.25 464 curveto
+370.25 464 370.25 476 370.25 476 curveto
+370.25 482 364.25 488 358.25 488 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+237.5 466.3 moveto 125 (m=encryption\(mess,k\)) alignedtext
+grestore
+% message->encrypt
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 263.38 525.94 moveto
+269.15 517.28 276.28 506.57 282.72 496.92 curveto
+stroke
+0 0 0 edgecolor
+newpath 285.74 498.7 moveto
+288.37 488.44 lineto
+279.91 494.82 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 285.74 498.7 moveto
+288.37 488.44 lineto
+279.91 494.82 lineto
+closepath stroke
+grestore
+% key
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 360 562 moveto
+360 562 330 562 330 562 curveto
+324 562 318 556 318 550 curveto
+318 550 318 538 318 538 curveto
+318 532 324 526 330 526 curveto
+330 526 360 526 360 526 curveto
+366 526 372 532 372 538 curveto
+372 538 372 550 372 550 curveto
+372 556 366 562 360 562 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+328 540.3 moveto 34 (Key k) alignedtext
+grestore
+% key->encrypt
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 334.34 525.94 moveto
+328.92 517.28 322.23 506.57 316.2 496.92 curveto
+stroke
+0 0 0 edgecolor
+newpath 319.17 495.07 moveto
+310.9 488.44 lineto
+313.23 498.78 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 319.17 495.07 moveto
+310.9 488.44 lineto
+313.23 498.78 lineto
+closepath stroke
+grestore
+% sample
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 521.25 184 moveto
+521.25 184 440.75 184 440.75 184 curveto
+434.75 184 428.75 178 428.75 172 curveto
+428.75 172 428.75 160 428.75 160 curveto
+428.75 154 434.75 148 440.75 148 curveto
+440.75 148 521.25 148 521.25 148 curveto
+527.25 148 533.25 154 533.25 160 curveto
+533.25 160 533.25 172 533.25 172 curveto
+533.25 178 527.25 184 521.25 184 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+436.5 162.3 moveto 89 (y= sample\(x,m\)) alignedtext
+grestore
+% key->sample
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 372.19 540.66 moveto
+411.88 535.59 481 519.76 481 471 curveto
+481 471 481 471 481 253 curveto
+481 233.4 481 211.3 481 194.4 curveto
+stroke
+0 0 0 edgecolor
+newpath 484.5 194.13 moveto
+481 184.13 lineto
+477.5 194.13 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 484.5 194.13 moveto
+481 184.13 lineto
+477.5 194.13 lineto
+closepath stroke
+grestore
+% ee
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 125.5 184 moveto
+125.5 184 66.5 184 66.5 184 curveto
+60.5 184 54.5 178 54.5 172 curveto
+54.5 172 54.5 160 54.5 160 curveto
+54.5 154 60.5 148 66.5 148 curveto
+66.5 148 125.5 148 125.5 148 curveto
+131.5 148 137.5 154 137.5 160 curveto
+137.5 160 137.5 172 137.5 172 curveto
+137.5 178 131.5 184 125.5 184 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+62 162.3 moveto 68 (Modify b, T) alignedtext
+grestore
+% ee->ED
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 91.84 184.17 moveto
+88.71 198.06 84.67 218.16 83 236 curveto
+75.9 312.08 105.07 399.66 121.87 442.55 curveto
+stroke
+0 0 0 edgecolor
+newpath 118.68 443.99 moveto
+125.65 451.97 lineto
+125.18 441.39 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 118.68 443.99 moveto
+125.65 451.97 lineto
+125.18 441.39 lineto
+closepath stroke
+grestore
+% cond
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 247 400 moveto
+152 362 lineto
+247 324 lineto
+342 362 lineto
+closepath stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+222.5 365.8 moveto 49 (Size of x) alignedtext
+0 0 0 nodecolor
+14 /Times-Roman set_font
+207.5 350.8 moveto 79 ( enough for m) alignedtext
+grestore
+% encrypt->cond
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 291.48 451.97 moveto
+284.92 438.83 275.56 420.12 267.12 403.24 curveto
+stroke
+0 0 0 edgecolor
+newpath 270.15 401.48 moveto
+262.55 394.1 lineto
+263.89 404.61 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 270.15 401.48 moveto
+262.55 394.1 lineto
+263.89 404.61 lineto
+closepath stroke
+grestore
+% STC
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 398 184 moveto
+398 184 318 184 318 184 curveto
+312 184 306 178 306 172 curveto
+306 172 306 160 306 160 curveto
+306 154 312 148 318 148 curveto
+318 148 398 148 398 148 curveto
+404 148 410 154 410 160 curveto
+410 160 410 172 410 172 curveto
+410 178 404 184 398 184 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+314 162.3 moveto 88 (y= STC\(x,m,H\)) alignedtext
+grestore
+% emb
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 490.25 110 moveto
+490.25 110 371.75 110 371.75 110 curveto
+365.75 110 359.75 104 359.75 98 curveto
+359.75 98 359.75 86 359.75 86 curveto
+359.75 80 365.75 74 371.75 74 curveto
+371.75 74 490.25 74 490.25 74 curveto
+496.25 74 502.25 80 502.25 86 curveto
+502.25 86 502.25 98 502.25 98 curveto
+502.25 104 496.25 110 490.25 110 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+367.5 88.3 moveto 127 (stego=embedding\(y,X\)) alignedtext
+grestore
+% STC->emb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 375.3 147.94 moveto
+384.6 138.77 396.22 127.31 406.43 117.23 curveto
+stroke
+0 0 0 edgecolor
+newpath 408.91 119.7 moveto
+413.57 110.19 lineto
+403.99 114.72 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 408.91 119.7 moveto
+413.57 110.19 lineto
+403.99 114.72 lineto
+closepath stroke
+grestore
+% sample->emb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 469.15 147.94 moveto
+463.14 139.28 455.7 128.57 449 118.92 curveto
+stroke
+0 0 0 edgecolor
+newpath 451.69 116.66 moveto
+443.11 110.44 lineto
+445.94 120.65 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 451.69 116.66 moveto
+443.11 110.44 lineto
+445.94 120.65 lineto
+closepath stroke
+grestore
+% end
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 446 36 moveto
+446 36 416 36 416 36 curveto
+410 36 404 30 404 24 curveto
+404 24 404 12 404 12 curveto
+404 6 410 0 416 0 curveto
+416 0 446 0 446 0 curveto
+452 0 458 6 458 12 curveto
+458 12 458 24 458 24 curveto
+458 30 452 36 446 36 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+420 14.3 moveto 22 (End) alignedtext
+grestore
+% emb->end
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 431 73.94 moveto
+431 65.81 431 55.88 431 46.7 curveto
+stroke
+0 0 0 edgecolor
+newpath 434.5 46.44 moveto
+431 36.44 lineto
+427.5 46.44 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 434.5 46.44 moveto
+431 36.44 lineto
+427.5 46.44 lineto
+closepath stroke
+grestore
+% start
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 217 636 moveto
+217 636 187 636 187 636 curveto
+181 636 175 630 175 624 curveto
+175 624 175 612 175 612 curveto
+175 606 181 600 187 600 curveto
+187 600 217 600 217 600 curveto
+223 600 229 606 229 612 curveto
+229 612 229 624 229 624 curveto
+229 630 223 636 217 636 curveto
+stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+189 614.3 moveto 26 (Start) alignedtext
+grestore
+% start->PI
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 174.84 603.96 moveto
+153.03 593.49 121.97 578.58 96.53 566.38 curveto
+stroke
+0 0 0 edgecolor
+newpath 97.98 563.19 moveto
+87.45 562.01 lineto
+94.95 569.5 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 97.98 563.19 moveto
+87.45 562.01 lineto
+94.95 569.5 lineto
+closepath stroke
+grestore
+% start->PIb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 190.62 599.94 moveto
+184.85 591.28 177.72 580.57 171.28 570.92 curveto
+stroke
+0 0 0 edgecolor
+newpath 174.09 568.82 moveto
+165.63 562.44 lineto
+168.26 572.7 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 174.09 568.82 moveto
+165.63 562.44 lineto
+168.26 572.7 lineto
+closepath stroke
+grestore
+% start->message
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 213.85 599.94 moveto
+219.86 591.28 227.3 580.57 234 570.92 curveto
+stroke
+0 0 0 edgecolor
+newpath 237.06 572.65 moveto
+239.89 562.44 lineto
+231.31 568.66 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 237.06 572.65 moveto
+239.89 562.44 lineto
+231.31 568.66 lineto
+closepath stroke
+grestore
+% start->key
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 229.23 603.29 moveto
+251.8 591.93 284.05 575.69 308.79 563.23 curveto
+stroke
+0 0 0 edgecolor
+newpath 310.51 566.28 moveto
+317.87 558.66 lineto
+307.36 560.03 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 310.51 566.28 moveto
+317.87 558.66 lineto
+307.36 560.03 lineto
+closepath stroke
+grestore
+% ED->cond
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 151.32 451.97 moveto
+167.5 436.92 191.56 414.55 211.51 396 curveto
+stroke
+0 0 0 edgecolor
+newpath 213.99 398.48 moveto
+218.93 389.1 lineto
+209.22 393.35 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 213.99 398.48 moveto
+218.93 389.1 lineto
+209.22 393.35 lineto
+closepath stroke
+grestore
+% condStrat
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 189 272 moveto
+91.85 254 lineto
+189 236 lineto
+286.15 254 lineto
+closepath stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+144 250.3 moveto 90 (Strategy is fixed) alignedtext
+grestore
+% cond->condStrat
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 230.38 330.62 moveto
+221.51 314.41 210.74 294.72 202.41 279.5 curveto
+stroke
+0 0 0 edgecolor
+newpath 205.44 277.76 moveto
+197.57 270.67 lineto
+199.3 281.12 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 205.44 277.76 moveto
+197.57 270.67 lineto
+199.3 281.12 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+216 294.3 moveto 17 (No) alignedtext
+grestore
+% condEmb
+gsave
+1 setlinewidth
+0 0 0 nodecolor
+newpath 379 272 moveto
+304.82 254 lineto
+379 236 lineto
+453.18 254 lineto
+closepath stroke
+0 0 0 nodecolor
+14 /Times-Roman set_font
+346.5 250.3 moveto 65 (Use of STC) alignedtext
+grestore
+% cond->condEmb
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 277.95 336.15 moveto
+301.36 317.35 333.06 291.89 354.67 274.54 curveto
+stroke
+0 0 0 edgecolor
+newpath 357.09 277.08 moveto
+362.7 268.09 lineto
+352.71 271.62 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 357.09 277.08 moveto
+362.7 268.09 lineto
+352.71 271.62 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+332 294.3 moveto 63 (Yes with H) alignedtext
+grestore
+% condStrat->PI
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 173.22 269.38 moveto
+141.49 299.52 70.77 373.07 45 452 curveto
+38.23 472.75 40.77 497.51 44.56 515.96 curveto
+stroke
+0 0 0 edgecolor
+newpath 41.16 516.8 moveto
+46.81 525.76 lineto
+47.98 515.23 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 41.16 516.8 moveto
+46.81 525.76 lineto
+47.98 515.23 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+59 422.3 moveto 17 (No) alignedtext
+grestore
+% condStrat->ee
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 173.64 238.8 moveto
+159.72 225.93 138.91 206.68 122.33 191.35 curveto
+stroke
+0 0 0 edgecolor
+newpath 124.3 188.41 moveto
+114.59 184.19 lineto
+119.55 193.55 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 124.3 188.41 moveto
+114.59 184.19 lineto
+119.55 193.55 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+151 206.3 moveto 22 (Yes) alignedtext
+grestore
+% condEmb->STC
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 375.05 236.82 moveto
+372.13 224.88 368.1 208.34 364.68 194.36 curveto
+stroke
+0 0 0 edgecolor
+newpath 367.99 193.17 moveto
+362.22 184.28 lineto
+361.19 194.83 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 367.99 193.17 moveto
+362.22 184.28 lineto
+361.19 194.83 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+370 206.3 moveto 22 (Yes) alignedtext
+grestore
+% condEmb->sample
+gsave
+1 setlinewidth
+0 0 0 edgecolor
+newpath 394.94 239.56 moveto
+410.36 226.56 434.08 206.56 452.71 190.85 curveto
+stroke
+0 0 0 edgecolor
+newpath 455.21 193.32 moveto
+460.6 184.2 lineto
+450.7 187.97 lineto
+closepath fill
+1 setlinewidth
+solid
+0 0 0 edgecolor
+newpath 455.21 193.32 moveto
+460.6 184.2 lineto
+450.7 187.97 lineto
+closepath stroke
+0 0 0 edgecolor
+14 /Times-Roman set_font
+439 206.3 moveto 17 (No) alignedtext
+grestore
+endpage
+showpage
+grestore
+%%PageTrailer
+%%EndPage: 1
+%%Trailer
+%%Pages: 1
+%%BoundingBox: 36 36 577 680
+end
+restore
+%%EOF
However by combining Adaptive and STC strategies
our approach obtains similar results than the ones of these schemes.
-Compared to EAILSBMR, we obtain better results when the strategy is
+Compared to EAILSBMR, we obtain similar
+results when the strategy is
Adaptive.
-However due to its
-huge number of integration features, it is not lightweight.
+However due to its huge number of integration features, it is not lightweight.
All these numerical experiments confirm
the objective presented in the motivations:
long message in the cover signal.
Practically speaking, our approach is efficient enough for
payloads close to 0.06 bit per pixel which allows to embed
-messages of length larger than 16000 bits in an
+messages of length larger than 15728 bits in an
image of size $512\times 512$ pixels.
% Message extraction is achieved by computing the same
Furthermore, we plan to investigate information hiding on other models, such as high frequency for JPEG encoding.
-\bibliographystyle{spbasic}
+%\bibliographystyle{spbasic}
+\bibliographystyle{spmpsci}
\bibliography{abbrev,biblioand}
PIb -> ED
-
+ PIb -> STC
start -> key
$\rho_X(i,x,y)$ is equal to 1 for any $i$, $x$, $y$
(\textit{i.e.}, $\rho_X(i,x,y) = 0$ if $x = y$ and $1$ otherwise).
-Let $H$ be the binary Hamming matrix
+Let $\dot{H}$ be the binary Hamming matrix
$$
-H = \left(
+\dot{H} = \left(
\begin{array}{lllllll}
0 & 0 & 0 & 1 & 1 & 1 & 1 \\
0 & 1 & 1 & 0 & 0 & 1 & 1 \\
\end{array}
\right).
$$
-The objective is to modify $x$ to get $y$ s.t. $m = Hy$.
+The objective is to modify $x$ to get $y$ s.t. $m = \dot{H}y$.
In this algebra, the sum and the product respectively correspond to
the exclusive \emph{or} and to the \emph{and} Boolean operators.
-If $Hx$ is already equal to $m$, nothing has to be changed and $x$ can be sent.
-Otherwise we consider the difference $\delta = d(m,Hx)$, which is expressed
+If $\dot{H}x$ is already equal to $m$, nothing has to be changed and $x$ can be sent.
+Otherwise we consider the difference $\delta = d(m,\dot{H}x)$, which is expressed
as a vector :
$$
\delta = \left( \begin{array}{l}
switching the $j-$th component of $x$,
that is, $\overline{x}^j = (x_1 , \ldots, \overline{x_j},\ldots, x_n )$.
It is not hard to see that if $y$ is $\overline{x}^j$, then
-$m = Hy$.
+$m = \dot{H}y$.
It is then possible to embed 3 bits in 7 LSBs of pixels by modifying
at most 1 bit.
In the general case, communicating a message of $p$ bits in a cover of
