Images comparison

Brief Description

Estimator between 2 images.

Tags

Miscellaneous, Statistics, Image Manipulation

Long Description

This application computes MSE (Mean Squared Error), MAE (Mean Absolute Error) and PSNR (Peak Signal to Noise Ratio) between the channel of two images (reference and measurement). The user has to set the used channel and can specify a ROI.

Parameters

• Reference image properties (ref):

  • Reference image (ref.in): Image used as reference in the comparison

  • Reference image channel (ref.channel): Used channel for the reference image




• Measured image properties (meas):

  • Measured image (meas.in): Image used as measured in the comparison

  • Measured image channel (meas.channel): Used channel for the measured image




• Region Of Interest (relative to reference image) (roi):

  • Start X (roi.startx): ROI start x position.

  • Start Y (roi.starty): ROI start y position.

  • Size X (roi.sizex): Size along x in pixels.

  • Size Y (roi.sizey): Size along y in pixels.




• MSE (mse): Mean Squared Error value

• MAE (mae): Mean Absolute Error value

• PSNR (psnr): Peak Signal to Noise Ratio value

• count (count): Nb of pixels which are different

• Available RAM (Mb) (ram): Available memory for processing (in MB)

• Load otb application from xml file (inxml): Load otb application from xml file

• Save otb application to xml file (outxml): Save otb application to xml file

Limitations

None

Authors

OTB-Team

See also

BandMath application, ImageStatistics

Example of use

• Values for GUIs:

• ref.in: GomaApres.png

• ref.channel: 1

• meas.in: GomaAvant.png

• meas.channel: 2

• roi.startx: 20

• roi.starty: 30

• roi.sizex: 150

• roi.sizey: 200

• Command line to execute:

otbcli_CompareImages -ref.in GomaApres.png -ref.channel 1 -meas.in GomaAvant.png -meas.channel 2 -roi.startx 20 -roi.starty 30 -roi.sizex 150 -roi.sizey 200