---
name: "conv"
section: "1"
platform: "linux"
package: "gmtsar-core"
version: "6.5+ds-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/conv"
---

# conv(1)

conv

## NAME

conv - conv

## SYNOPSIS

**conv** *idec jdec filter\_file input output*

## DESCRIPTION

This program is part of GMTSAR.

-

  conv \[GMTSAR\] - 2-D image convolution

- idec

  \- row decimation factor

- jdec

  \- column decimation factor

- filter\_file

  \- eg. filters/gauss17x5

- input

  \- name of file to be filtered (I\*2 or R\*4)

- output

  \- name of filtered output file (R\*4 only)

-

  examples: conv 4 2 filters/gauss9x5 IMG-HH-ALPSRP109430660-H1.0\_\_A.PRM test.grd (makes and filters amplitude file from an SLC-file)

-

  conv 4 2 filters/gauss5x5 infile.grd outfile.grd (filters a float file)

-

  conv \[GMTSAR\] - 2-D image convolution

Usage: conv idec jdec filter\_file input output

- idec

  \- row decimation factor

- jdec

  \- column decimation factor

- filter\_file

  \- eg. filters/gauss17x5

- input

  \- name of file to be filtered (I\*2 or R\*4)

- output

  \- name of filtered output file (R\*4 only)

-

  examples: conv 4 2 filters/gauss9x5 IMG-HH-ALPSRP109430660-H1.0\_\_A.PRM test.grd (makes and filters amplitude file from an SLC-file)

-

  conv 4 2 filters/gauss5x5 infile.grd outfile.grd (filters a float file)