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TLDR: pnmindex (tldr-pages)

Build a visual index of multiple PNM images.

  • Produce an image containing thumbnails of the specified images in a grid
    pnmindex {{path/to/input1.pnm path/to/input2.pnm ...}} > {{path/to/output.pnm}}
  • Specify the size of the (quadratic) thumbnails
    pnmindex {{-s|-size}} {{50}} {{path/to/input1.pnm path/to/input2.pnm ...}} > {{path/to/output.pnm}}
  • Specify the number of thumbnails per row
    pnmindex {{-a|-across}} {{10}} {{path/to/input1.pnm path/to/input2.pnm ...}} > {{path/to/output.pnm}}
  • Specify the maximum number of colors in the output
    pnmindex {{-c|-colors}} {{512}} {{path/to/input1.pnm path/to/input2.pnm ...}} > {{path/to/output.pnm}}
pnmindex(1)                            General Commands Manual                           pnmindex(1)



NAME
       pnmindex - build a visual index of a bunch of anymaps

SYNOPSIS
       pnmindex [-size N] [-across N] [-colors N] [-black] [-title T] [-quant|-noquant] pnmfile ...


DESCRIPTION
       pnmindex creates an index image containing thumbnail (small) versions of a bunch of PNM files
       you supply.

       pnmindex labels each thumbnail and, optionally, contains a title.



OPTIONS
       -size N
              The size of each thumbnail.  The image is scaled to fit maximally inside a N x N pixel
              box without changing its aspect ratio.  Default is 100.

       -across N
              The number of thumbnails in each row.  Default is 6.

       -colors N
              The maximum number of colors allowed in the overall image.  If it would otherwise have
              more colors than these, pnmindex quantizes the result.  The default is 256.

              However, this value is meaningless if you specify the -noquant option.

       -black This controls the color of the padding between the images; normally it's white and the
              labels are black lettering on white background, but the -black flag reverses this.

       -title title
              Specifies a title top place at the top of the image.  Default is no title.

       -quant Enables  quanization (to the number of colors specified by -colors ).  Quantization is
              on by default but you can disable it with -noquant.

       -noquant
              See -quant.


SEE ALSO
       pnmscale(1), pnmcat(1), pbmtext(1), ppmquant(1), pnm(5)


AUTHOR
       Copyright (C) 1991 by Jef Poskanzer.  -title and -noquant added 2000 by John Heidemann.



                                           9 January 1991                                pnmindex(1)

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