---
name: "pfsoctavelum"
section: "1"
platform: "linux"
package: "pfstools"
version: "2.2.0-9"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pfsoctavelum"
---

# pfsoctavelum(1)

Process luminance in pfs stream using Octave

## NAME

pfsoctavelum - Process luminance in pfs stream using Octave

## SYNOPSIS

**pfsoctavelum \<octave\_program\>**

## DESCRIPTION

Use this command to execute a GNU Octave program on luminance channel of each frame in the pfs stream. *octave\_program* must be given in quotation marks ("") and must not produce any output (it can output to stderr, not to stdout). Color channels are scaled proportionaly to the luminance channel. Luminance channel is represented by matrix *Y*.

Note: This command requires GNU Octave.

## EXAMPLES

- pfsinrgbe frames\_%04d.hdr \| pfsoctavelum "Y = conv2( Y, gaussian( 10, 1/5 )\*gaussian( 10, 1/5 )', 'same' );" \| pfsview

  Blur the sequence of frames with gaussian blur and show the result with pfsview.

## BUGS

Please report bugs and comments to Rafal Mantiuk \<mantiuk@mpi-sb.mpg.de\>.