---
name: "otbcli_HomologousPointsExtraction"
section: "1"
platform: "linux"
package: "otb-bin"
version: "6.6.1+dfsg-1+b1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/otbcli_HomologousPointsExtraction"
---

# otbcli\_HomologousPointsExtraction(1)

OTB HomologousPointsExtraction application

## NAME

otbcli\_HomologousPointsExtraction - OTB HomologousPointsExtraction application

## DESCRIPTION

This is the HomologousPointsExtraction application, version 5.2.0 allows one to compute homologous points between images using keypoints

Complete documentation: http://www.orfeo-toolbox.org/Applications/HomologousPointsExtraction.html

### Parameters:

- **-progress**

  \<boolean\>        Report progress

 **-in1**                   \<string\>         Input Image 1  (mandatory)

- **-band1**

  \<int32\>          Input band 1  (mandatory, default value is 1)

 **-in2**                   \<string\>         Input Image 2  (mandatory)

- **-band2**

  \<int32\>          Input band 2  (mandatory, default value is 1)

- **-algorithm**

  \<string\>         Keypoints detection algorithm \[surf/sift\] (mandatory, default value is surf)

- **-threshold**

  \<float\>          Distance threshold for matching  (mandatory, default value is 0.6)

- **-backmatching**

  \<boolean\>        Use back-matching to filter matches.  (optional, off by default)

- **-mode**

  \<string\>         Keypoints search mode \[full/geobins\] (mandatory, default value is full)

- **-mode**.geobins.binsize

  \<int32\>          Size of bin  (mandatory, default value is 256)

- **-mode**.geobins.binsizey \<int32\>

  Size of bin (y direction)  (optional, off by default)

- **-mode**.geobins.binstep

  \<int32\>          Steps between bins  (mandatory, default value is 256)

- **-mode**.geobins.binstepy \<int32\>

  Steps between bins (y direction)  (optional, off by default)

- **-mode**.geobins.margin

  \<int32\>          Margin from image border to start/end bins (in pixels)  (mandatory, default value is 10)

- **-precision**

  \<float\>          Estimated precision of the colocalisation function (in pixels).  (mandatory, default value is 0)

- **-mfilter**

  \<boolean\>        Filter points according to geographical or sensor based colocalisation  (optional, off by default)

- **-2wgs84**

  \<boolean\>        If enabled, points from second image will be exported in WGS84  (optional, off by default)

- **-elev**.dem

  \<string\>         DEM directory  (optional, off by default)

- **-elev**.geoid

  \<string\>         Geoid File  (optional, off by default)

- **-elev**.default

  \<float\>          Default elevation  (mandatory, default value is 0)

 **-out**                   \<string\>         Output file with tie points  (mandatory)

- **-outvector**

  \<string\>         Output vector file with tie points  (optional, off by default)

- **-inxml**

  \<string\>         Load otb application from xml file  (optional, off by default)

## EXAMPLES

otbcli\_HomologousPointsExtraction -in1 sensor\_stereo\_left.tif -in2 sensor\_stereo\_right.tif -mode full -out homologous.txt

## SEE ALSO

The full documentation for **otbcli\_HomologousPointsExtraction** is maintained as a Texinfo manual.  If the **info** and **otbcli\_HomologousPointsExtraction** programs are properly installed at your site, the command

-

  **info otbcli\_HomologousPointsExtraction**

should give you access to the complete manual.