Rescale Image

Rescale the image between two given values.

Detailed description

This application scales the given image pixel intensity between two given values. By default min (resp. max) value is set to 0 (resp. 255). Input minimum and maximum values is automatically computed for all image bands.

Parameters

This section describes in details the parameters available for this application. Table [1] presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is Rescale .

[1]Table: Parameters table for Rescale Image.
Parameter Key Parameter Type Parameter Description
in Input image Input image
out Output image Output image
ram Int Int
outmin Float Float
outmax Float Float
inxml XML input parameters file XML input parameters file
outxml XML output parameters file XML output parameters file
  • Input Image: The image to scale.
  • Output Image: The rescaled image filename.
  • Available RAM (Mb): Available memory for processing (in MB).
  • Output min value: Minimum value of the output image.
  • Output max value: Maximum value of the output image.
  • Load otb application from xml file: Load otb application from xml file.
  • Save otb application to xml file: Save otb application to xml file.

Example

To run this example in command-line, use the following:

otbcli_Rescale -in QB_Toulouse_Ortho_PAN.tif -out rescaledImage.png uchar -outmin 0 -outmax 255

To run this example from Python, use the following code snippet:

#!/usr/bin/python

# Import the otb applications package
import otbApplication

# The following line creates an instance of the Rescale application
Rescale = otbApplication.Registry.CreateApplication("Rescale")

# The following lines set all the application parameters:
Rescale.SetParameterString("in", "QB_Toulouse_Ortho_PAN.tif")

Rescale.SetParameterString("out", "rescaledImage.png")
Rescale.SetParameterOutputImagePixelType("out", 1)

Rescale.SetParameterFloat("outmin", 0)

Rescale.SetParameterFloat("outmax", 255)

# The following line execute the application
Rescale.ExecuteAndWriteOutput()

Limitations

None

Authors

This application has been written by OTB-Team.