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ISIS Documentation

thmvisflat

This program applies a flat field correction to Themis VIS Images

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

Categories

History

Steven Lambright2008-06-13 Original version

Parameters

Files

This is the non-flat-field corrected, unprojected themis cube
Type cube
File Mode input
Filter *.cub

This is the flat-field corrected themis cube
Type cube
File Mode output
Pixel Type real
Filter *.cub

Example 1

Running this program on a themis vis image

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

Command Line

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

Input Image

Raw Data

Input Cube Data

Raw 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

The corrected image

Corrected Output

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.