Tile/concatenate high resolution PDF files with imagemagick -


i've 9 high quality pdf files. want merge them 1 large pdf of 3x3. want turn png file. want keep resolution/sharpness during process on resulting png can zoom right in , still see fine detail. thought might imagemagick i'm struggling. ideas please?

i've tried merge them start with. works, quality doesn't remain.

montage input_*.pdf -background none -tile 3x3 -geometry +0+0 output.pdf

please note file size , size of resulting image isn't issue. i've no need print or that. it's viewing on computer only.

here sample of 3 of pdf files:

1) https://www.dropbox.com/s/qc094jg1nkfk0jw/input_1.pdf?dl=0

2) https://www.dropbox.com/s/gb4u8r7bxg8lw2r/input_2.pdf?dl=0

3) https://www.dropbox.com/s/97dhi42wrvfxfd2/input_3.pdf?dl=0

each pdf 1071 x 1800 pts (using pdfinfo).

thanks

james

rather stick pdf , merge , convert png, may better extract images png in first place , concatenate png files this:

pdfimages -png input_1.pdf pdfimages -png input_2.pdf pdfimages -png input_3.pdf  # combine them side side montage a-*png -background none -tile 3x3 -geometry +0+0 output.png  # or combine "convert" convert a-*.png +append result.png

the second document seems have mask...

pdfimages -list input_1.pdf page   num  type   width height color comp bpc  enc interp  object id x-ppi y-ppi size ratio --------------------------------------------------------------------------------------------    1     0 image   12000 20167  icc     3   8  image  no         9  0   807   807 1260k 0.2%  pdfimages -list input_2.pdf page   num  type   width height color comp bpc  enc interp  object id x-ppi y-ppi size ratio --------------------------------------------------------------------------------------------    1     0 image   12000 20167  icc     3   8  image  no         9  0   807   807 5781k 0.8%    1     1 smask   12000 20167  gray    1   8  image  no         9  0   807   807  230k 0.1%  pdfimages -list input_3.pdf page   num  type   width height color comp bpc  enc interp  object id x-ppi y-ppi size ratio --------------------------------------------------------------------------------------------    1     0 image   12001 20167  icc     3   8  image  no         9  0   807   807 2619k 0.4%

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