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USGS

ISIS Application Documentation

thmvisflat

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This program applies a flat field correction to Themis VIS Images

Description
Categories
Groups
Examples
History

Description

This program applies a flat-field correction for each framelet based on the band's filter number

Categories

Parameter Groups

Files

Name Description
FROM Input Themis VIS image
TO Output Themis VIS Imagw

Files: FROM

Description

This is the non-flat-field corrected, unprojected themis cube

Type cube
File Mode input
Filter *.cub

Files: TO

Description

This is the flat-field corrected themis cube

Type cube
File Mode output
Pixel Type real
Filter *.cub

Examples

Example 1

Running this program on a themis vis image

Description

This program applies a flat-field correction to the input Themis Vis image

Command Line

thmvisflat from=V04860003EDR.even.cub to=V04860003EDR.even.flat.cub
This applies a flat-field correction to the V04860003EDR.even.cub themis vis cube

Input Image

Raw Data
Raw Data

Input Cube Data

This is the raw input data; notice the bottom of each framelet is darker than the rest (fades to black). This is a consistent problem with the camera.

Output Image

Corrected Output
Corrected Output

The corrected image

This is the output from this program; notice each framelet ends sharply now. Other minor corrections exist, but the most noticable correction is data from the darker area is brightened.

History

Steven Lambright2008-06-13 Original version
U.S. Department of the Interior | U.S. Geological Survey
ISIS | Privacy & Disclaimers | Astrogeology Research Program
To contact us, please post comments and questions on the USGS Astrogeology Discussion Board
To report a bug, or suggest a feature go to: ISIS Github
File Modified: 02/24/2025 16:09:26