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stb-image-djvul demo.

DjVu Layered - image bundle on the mask + foreground + background using "Multi-scale binarization".

Degradation of images on layers mask, foreground and background by cluster analysis with a gradual decrease in block size.

demo

origin

mona

DjVuL

Separate image to Mask+Bg+Fg:

stbdjvul mona.jpg mona.mask.png mona.bg.png mona.fg.png Load: mona.jpg image: 3036x4096:3 BG: 1012x1366:3 FG: 506x683:3 DjVuL... 11 level Save png: mona.mask.png, mona.bg.png, mona.fg.png.

Mask:
Mask
Bg:
Bg
Fg:
Fg

Netpbm

Convert separate image to PNM:

pngtopnm mona.bg.png > mona.bg.ppm pngtopnm mona.fg.png > mona.fg.ppm pngtopnm mona.mask.png | ppmtopgm | pgmtopbm > mona.mask.pbm

DjVuLibre

Coding to DjVu:

cjb2 mona.mask.pbm mona.mask.djvu c44 mona.bg.ppm mona.bg.djvu c44 -slice 100 mona.fg.ppm mona.fg.djvu

Extract and combine chunks:

djvuextract mona.mask.djvu Sjbz=mona.Sjbz.cnk Sjbz=mona.Sjbz.cnk --> "mona.Sjbz.cnk" (741921 bytes) djvuextract mona.fg.djvu BG44=mona.FG44.cnk BG44=mona.FG44.cnk --> "mona.FG44.cnk" (18065 bytes) djvuextract mona.bg.djvu BG44=mona.BG44.cnk BG44=mona.BG44.cnk --> "mona.BG44.cnk" (101299 bytes) djvumake mona.djvul.djvu INFO=,,300 Sjbz=mona.Sjbz.cnk FG44=mona.FG44.cnk BG44=mona.BG44.cnk

DjVuL

DjVuL using Bg and Fg mask

Separate image to Mask+Bg+Fg:

stbdjvul mona.jpg mona.mask.png mona.bg.png mona.fg.png mona.bgmask.png mona.fgmask.png Load: mona.jpg image: 3036x4096:3 BG: 1012x1366:3 FG: 506x683:3 DjVuL... 11 level Save png: mona.mask.png, mona.bg.png, mona.fg.png, mona.bgmask.png, mona.fgmask.png, mona.fgmask.png.

Mask:
Mask
Bg:
Bg
Bgmask:
Bg
Fg:
Fg
Fgmask:
Fg

Netpbm

Convert separate image to PNM:

pngtopnm mona.bg.png > mona.bg.ppm pngtopnm mona.fg.png > mona.fg.ppm pngtopnm mona.mask.png | ppmtopgm | pgmtopbm > mona.mask.pbm pngtopnm mona.bgmask.png | ppmtopgm | pgmtopbm > mona.bgmask.pbm pngtopnm mona.fgmask.png | ppmtopgm | pgmtopbm > mona.fgmask.pbm

DjVuLibre

Coding to DjVu:

cjb2 mona.mask.pbm mona.mask.djvu c44 -mask mona.bgmask.pbm mona.bg.ppm mona.bgm.djvu c44 -slice 100 -mask mona.fgmask.pbm mona.fg.ppm mona.fgm.djvu

Extract and combine chunks:

djvuextract mona.mask.djvu Sjbz=mona.Sjbz.cnk Sjbz=mona.Sjbz.cnk --> "mona.Sjbz.cnk" (741921 bytes) djvuextract mona.fgm.djvu BG44=mona.FG44.m.cnk BG44=mona.FG44.m.cnk --> "mona.FG44.m.cnk" (17732 bytes) djvuextract mona.bgm.djvu BG44=mona.BG44.m.cnk BG44=mona.BG44.m.cnk --> "mona.BG44.m.cnk" (95094 bytes) djvumake mona.djvul.m.djvu INFO=,,300 Sjbz=mona.Sjbz.cnk FG44=mona.FG44.m.cnk BG44=mona.BG44.m.cnk

DjVuL

DjVuL and lossy mask.

DjVuLibre

Coding to DjVu:

cjb2 -losslevel 100 mona.mask.pbm mona.mask.l100.djvu c44 -mask mona.bgmask.pbm mona.bg.ppm mona.bgm.djvu c44 -slice 100 -mask mona.fgmask.pbm mona.fg.ppm mona.fgm.djvu

Extract and combine chunks:

djvuextract mona.mask.l100.djvu Sjbz=mona.Sjbz.l100.cnk Sjbz=mona.Sjbz.l100.cnk --> "mona.Sjbz.l100.cnk" (723372 bytes) djvuextract mona.fgm.djvu BG44=mona.FG44.m.cnk BG44=mona.FG44.m.cnk --> "mona.FG44.m.cnk" (17732 bytes) djvuextract mona.bgm.djvu BG44=mona.BG44.m.cnk BG44=mona.BG44.m.cnk --> "mona.BG44.m.cnk" (95094 bytes) djvumake mona.djvul.l100.m.djvu INFO=,,300 Sjbz=mona.Sjbz.l100.cnk FG44=mona.FG44.m.cnk BG44=mona.BG44.m.cnk

DjVuL

DjVuL using anisotropic

Separate image to Mask+Bg+Fg:

stbdjvul -a -0.5 mona.jpg mona.mask.an.png mona.bg.an.png mona.fg.an.png mona.bgmask.an.png mona.fgmask.an.png Load: mona.jpg image: 3036x4096:3 BG: 1012x1366:3 FG: 506x683:3 DjVuL... 11 level Save png: mona.mask.an.png, mona.bg.an.png, mona.fg.an.png, mona.bgmask.an.png, mona.fgmask.an.png, mona.fgmask.an.png.

Mask:
Mask
Bg:
Bg
Bgmask:
Bg
Fg:
Fg
Fgmask:
Fg

Netpbm

Convert separate image to PNM:

pngtopnm mona.bg.an.png > mona.bg.an.ppm pngtopnm mona.fg.an.png > mona.fg.an.ppm pngtopnm mona.mask.an.png | ppmtopgm | pgmtopbm > mona.mask.an.pbm pngtopnm mona.bgmask.an.png | ppmtopgm | pgmtopbm > mona.bgmask.an.pbm pngtopnm mona.fgmask.an.png | ppmtopgm | pgmtopbm > mona.fgmask.an.pbm

DjVuLibre

Coding to DjVu:

cjb2 -losslevel 100 mona.mask.an.pbm mona.mask.an.djvu c44 -mask mona.bgmask.an.pbm mona.bg.an.ppm mona.bgm.an.djvu c44 -slice 100 -mask mona.fgmask.an.pbm mona.fg.an.ppm mona.fgm.an.djvu

Extract and combine chunks:

djvuextract mona.mask.an.djvu Sjbz=mona.Sjbz.an.cnk Sjbz=mona.Sjbz.an.cnk --> "mona.Sjbz.an.cnk" (518435 bytes) djvuextract mona.fgm.an.djvu BG44=mona.FG44.an.cnk BG44=mona.FG44.an.cnk --> "mona.FG44.an.cnk" (17626 bytes) djvuextract mona.bgm.an.djvu BG44=mona.BG44.an.cnk BG44=mona.BG44.an.cnk --> "mona.BG44.an.cnk" (75368 bytes) djvumake mona.djvul.an.djvu INFO=,,300 Sjbz=mona.Sjbz.an.cnk FG44=mona.FG44.an.cnk BG44=mona.BG44.an.cnk

DjVuL

Compare

Djvumake:

Man djvumake:

 cjb2 mymask.pbm mymask.djvu djvumake my.djvu Sjbz=mymask.djvu PPM=myimage.ppm

Use mona.mask.djvu:

jpegtopnm mona.jpg > mona.ppm djvumake mona.djvumake.djvu Sjbz=mona.mask.djvu PPM=mona.ppm

DjvuMake

No Mask, only Bg:

c44 -dpi 300 mona.ppm mona.c44.djvu

C44

Result

ls -l *.djvu 101321 mona.bg.djvu 75390 mona.bgm.an.djvu 95116 mona.bgm.djvu 1339946 mona.c44.djvu 861305 mona.djvul.djvu 611448 mona.djvul.an.djvu 836216 mona.djvul.l100.m.djvu 854766 mona.djvul.m.djvu 803208 mona.djvumake.djvu 18087 mona.fg.djvu 17648 mona.fgm.an.djvu 17754 mona.fgm.djvu 741963 mona.mask.djvu 518477 mona.mask.an.djvu 723414 mona.mask.l100.djvu

About

Demo of stb-image-djvul

github.com/ImageProcessing-ElectronicPublications/stb-image-djvul

Topics

images samples djvu djvulibre djvul

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