Atmospheric remote sensing toolkit

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BRG The University of Queensland
Fundamentals

- Main page
- Pre-processing
  - Image acquisition
  - When to correct
  - Correction types
    - Radiometric
    - Atmospheric
    - Geometric
  - Masking
- Field data collection
- Mapping approaches
- Change and trends
- Delivery

# Relative atmospheric correction

## Dark pixel subtraction

Uncorrected image
Atmospheric corrected image

For relative atmospheric correction it is assumed that the haze component present in an image is additive (evident in x-axis offset in histogram):

1. Locate area in image with 0 reflectance
2. Record DNdark for 0 reflectance feature in each spectral band
3. Subtract DNdark-band_n from all pixels in band n

## References:

Jensen, JR (2005). Introductory digital image processing: a remote sensing perspective. Third edition, Prentice Hall: 316p.