---
name: "sgi2fax"
section: "1"
platform: "linux"
package: "hylafax-client"
version: "1:4.2.1-5sarge3"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/sgi2fax"
---

# sgi2fax(1)

convert a Silicon Graphics image file for facsimile transmission

## NAME

sgi2fax - convert a Silicon Graphics image file for facsimile transmission

## SYNOPSIS

**/usr/sbin/sgi2fax** \[ *options* \] *files*...

## DESCRIPTION

*sgi2fax* converts Silicon Graphics format images to bilevel TIFF Class F images in preparation for transmission as facsimile. *sgi2fax* is not normally invoked directly; it is usually run by [*sendfax*(1)](/sendfax/1.md) when an SGI image file is submitted for transmission.

Images are converted by scaling them to fill the guaranteed reproducible area on a default page. Each  RGB pixel *p* is converted to greyscale according to:

```

pr * %r + pg * %g + pb * %b

```

where %r, %g, and %b default to 30, 59, and 11, respectively. Greyscale images are then process with a high pass filter and dithered to a bilevel image. The resultant image are written as a  TIFF Class F document.

By default, the output image is created with 204 dots/inch horizontal resolution and 98 lines/inch vertical resolution. The image is written as Group 3 1D-encoded data.

## OPTIONS

- **-1**

  (**-2**) Write the image as Group 3 1D- (2D-) encoded data.

- **-b** *%b*

  Set the *%b* parameter used to convert color pixel values to greyscale pixel values.

- **-g** *%g*

  Set the *%g* parameter used to convert color pixel values to greyscale pixel values.

- **-l**

  Generate an image at 98 lines/inch vertical resolution. know as *low resolution*.

- **-m**

  Generate an image at 196 lines/inch vertical resolution.

- **-o** *file*

  Write output to *file* instead of the default file named **sgi.fax**.

- **-r** *%r*

  Set the *%r* parameter used to convert color pixel values to greyscale pixel values.

- **-s** *size*

  Set the output size according to the named page size. Images are normally created with a system-default page size (usually letter-size pages, 8.5" by 11", for sites in North America). Alternate page sizes are specified symbolically using either the name or abbreviation of an entry in the [*pagesizes*(5)](/pagesizes/5.md) database; e.g. *a3* (ISO A3), *a4* (ISO A4), *a5* (ISO A5), *a6* (ISO A6), *b4* (ISO B4), *na-let* (North American Letter), *us-leg* (American Legal), *us-led* (American Ledger), *us-exe* (American Executive), *jp-let* (Japanese Letter), and *jp-leg* (Japanese Legal). Comparisons are case-insensitive and any match of a substring of the full page-size name is sufficient; e.g. \`\`legal'' would match \`\`American Legal''.

## FILES

/etc/hylafax/pagesizes	page size database

## SEE ALSO

[*hylafax-client*(1)](/hylafax-client/1.md), [*sendfax*(1)](/sendfax/1.md), *[hylafax-server(5)](/hylafax-server/5.md)*