Smoothing

Brief Description

Apply a smoothing filter to an image

Tags

Image Filtering

Long Description

This application applies a smoothing filter to an image. Three methodes can be used : a gaussian filter , a mean filter , or an anisotropic diffusion using the Perona-Malik algorithm.

Parameters

• Input Image (in): Input image to smooth.

• Output Image (out): Output smoothed image.

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

• Smoothing Type (type): Smoothing kernel to apply

  • Mean (mean):

    • Radius (type.mean.radius): Kernel's radius (in pixels)

  • Gaussian (gaussian):

    • Radius (type.gaussian.radius): Standard deviation of the gaussian kernel used to filter the image

  • Anisotropic Diffusion (anidif):

    • Time Step (type.anidif.timestep): Time step that will be used to discretize the diffusion equation

    • Nb Iterations (type.anidif.nbiter): Number of iterations needed to get the result

    • Conductance (type.anidif.conductance): Controls the sensitivity of the conductance term in the diffusion equation. The lower it is the stronger the features will be preserved




• 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

Example of use

• Values for GUIs:
• Image smoothing using a mean filter.

  • in: Romania_Extract.tif

  • out: smoothedImage_mean.png uchar

  • type: mean

• Image smoothing using an anisotropic diffusion filter.

  • in: Romania_Extract.tif

  • out: smoothedImage_ani.png float

  • type: anidif

  • type.anidif.timestep: 0.1

  • type.anidif.nbiter: 5

  • type.anidif.conductance: 1.5

• Command line to execute:

Image smoothing using a mean filter.
otbcli_Smoothing -in Romania_Extract.tif -out smoothedImage_mean.png uchar -type mean
Image smoothing using an anisotropic diffusion filter.
otbcli_Smoothing -in Romania_Extract.tif -out smoothedImage_ani.png float -type anidif -type.anidif.timestep 0.1 -type.anidif.nbiter 5 -type.anidif.conductance 1.5