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Monochrome 1-bit export?

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Monochrome 1-bit export? John Coppens 22 Jun 14:24
  Monochrome 1-bit export? oliver@des-or-mad.net 22 Jun 15:26
   Monochrome 1-bit export? John Coppens 22 Jun 16:08
John Coppens
2013-06-22 14:24:10 UTC (over 11 years ago)

Monochrome 1-bit export?

Hi guys.

I used to save images in 1-bit PCX format, as required by several label (thermal transfer) printers. I can't find any way to do that anymore.

Export to PCX does not give any options, and exports 24bit color.

Even after changing the image format to indexed, and selecting 1-bit B/W, export to PCX is still

8-bit colour, 300 x 300 dpi, RLE compressed

Any way to accomplish

1-bit colour, 72 x 72 dpi, RLE compressed

John Note that another accepted format is monochrome BMP, but this does not seem to work either in GIMP. The only options offered are RGB.

oliver@des-or-mad.net
2013-06-22 15:26:33 UTC (over 11 years ago)

Monochrome 1-bit export?

Hi John,

I achieve good results using ImageMagick convert with the monochrome option:

convert -monochrome input.png output.pcx

Oliver

----- Original Message ----- From: john@jcoppens.com
To: gimp-user-list@gnome.org
Date: 22.06.2013 16:24:10
Subject: [Gimp-user] Monochrome 1-bit export?

Hi guys.

I used to save images in 1-bit PCX format, as required by several label (thermal transfer) printers. I can't find any way to do that anymore.

Export to PCX does not give any options, and exports 24bit color.

Even after changing the image format to indexed, and selecting 1-bit B/W, export to PCX is still

8-bit colour, 300 x 300 dpi, RLE compressed

Any way to accomplish

1-bit colour, 72 x 72 dpi, RLE compressed

John Note that another accepted format is monochrome BMP, but this does not seem to work either in GIMP. The only options offered are RGB.

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John Coppens
2013-06-22 16:08:34 UTC (over 11 years ago)

Monochrome 1-bit export?

On Sat, 22 Jun 2013 17:26:33 +0200 (CEST) oliver@des-or-mad.net wrote:

I achieve good results using ImageMagick convert with the monochrome option:

convert -monochrome input.png output.pcx

Hi Oliver.

-monochrome alone didn't do it. Adding -depth 1 neither, -color 2 neither.

After quite a bit of experimenting I did find a combination which produced the correct colors and resolution:

convert fk4.pcx -colors 2 -type bilevel -density 72x72 fk4a.pcx

(-monochrome did produce something: it separated the original into three color planes, each 8-bit)

A pity Gimp doesn't offer a dialog at the export, which offers 1-bit PCX output, instead of insisting on 8-bit, even if the image is marked as indexed B/W)

John