---
name: "gpiv_hilo"
section: "1"
platform: "linux"
package: "gpivtools"
version: "0.6.0-3.1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/gpiv_hilo"
---

# gpiv\_hilo(1)

High-low filtering for PIV images.

## NAME

gpiv\_hilo - High-low filtering for PIV images.

## SYNOPSIS

**gpiv\_hilo** \[**-h** \| **--help**\]  \[**-p** \| **--print**\]  \[**-w** *N*\]  \[**-v** \| **--version**\]  \[*filename*\]  \< *stdin* \> *stdout*

## DESCRIPTION

**gpiv\_hilo** *applies high-low filtering or contrast extension on an* *image.*

*The parameters read from the configuration resources (containing the* *key* **GPIV\_IMGPROC**) may be overruled by the command line options, as explained below.

## Options

- **-h** \| **--help**

  On-line help

- **-v** \| **--version**

  Print version information on standard output, then exit successfully.

- **-w** *N*

  window size (default: 15)

- *filename*

  Input image filename. Overrides *stdin* and *stdout* with the full *filename* of the image. Output will be written to *filename***.png**. Parameters are stored in *filename***.par** and may be used for future use by including them in *./gpivrc*. If *stdin* and *stdout* are used, the input is expected to be a PNG formatted image.

- gpivtools

  ## SEE ALSO

## AUTHOR

Gerber Van der Graaf