PNMQUANTALL(1)

💖 PNMQUANTALL 💖

okay bestie, so you know that one Netpbm page, Pnmquantall User Manual? That's the one we're doing today. It lives in the General Commands Manual section and honestly? it's giving "tiny helper that does one thing and slays at it." 🎀

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✨ NAME ✨

pnmquantall — run Pnmquant on a whole lil squad of files all at once, so they all share one common colormap 🫶

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🌸 SYNOPSIS 🌸

pnmquantall

[-ext extension] ncolors netpbm_file...

not me having to warn you: the usual syntax rules for Netpbm programs do NOT apply to this one, fr fr. Like… you can't abbreviate -ext, and you can't just drop it anywhere on the line that you feel like. It goes where it goes. Periodt. 💅

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💜 DESCRIPTION 💜

This program is part of Netpbm(1). 🦋

So here's the tea: pnmquantall takes a whole bunch of Netpbm image files as input, picks out ncolors colors that best represent all of the images together, maps the existing colors over to those new ones, and then — and this is the part you gotta pay attention to — overwrites the input files with the new quantized versions. 😭

If you are not about that overwrite life, use the -ext option. Then the output files get named the same as the input files, plus a period and the extension text you specified. Easy. ✨

Now why would anyone want this? Let's say you've got a dozen PPMs that you wanna display on the screen all at the same time. Cute! But your screen can only display 256 different colors, and those PPMs have a total of a thousand-ish different colors between them. Inconvenient. 🙈 For a single image you'd fix this with pnmquant; pnmquantall is the one that solves it for multiple images.

Also, real talk, another approach to this whole problem is to pre-select a set of colors and then use pnmremap to separately quantize each PPM to that set. Just saying. 👑

Lowkey important: this is a rather simple program that just runs pnmcolormap and pnmremap under the hood. So if you're thinking about using it inside a program of any sophistication, you should probably just run those programs directly. Even if you're just typing it by hand, you may want to do the steps manually, because that gives you access to the various options of pnmcolormap and pnmremap for doing the quantization differently. main character energy, honestly. 💫

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⭐ OPTIONS ⭐

pnmquantall recognizes the following command line option:

• -ext extension — specify an extension for the output files. By default the input files are overwritten. 🎀

heads up bestie: pnmquantall does NOT recognize the options common to all programs based on libnetpbm (See Common Options). However — plot twist — the -version option does work. 💀

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🌈 SEE ALSO 🌈

• pnmquant(1)
• pnmremap(1)
• pnmcolormap(1)
• pnm(1)

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📜 DOCUMENT SOURCE 📜

This manual page was generated by the Netpbm tool makeman from HTML source. The master documentation is at

http://netpbm.sourceforge.net/doc/pnmquantall.html

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okay that's the whole page, bestie, you ate that 💅 netpbm documentation, dated 05 March 2012, Pnmquantall User Manual(1) — mwah, iconic, no cap. 🍓✨💖