image pre-processing

This section describes a few of the different tools available for pre-processing scanned images.

Note

For working with KH-9 images, the reseau field re-sampling and image joining steps are required.

• KH-9 pre-processing steps
  • image joining
  • reseau field
  • cross removal
  • contrast enhancement
• air photo pre-processing
  • fiducial marks
  • example camera models
  • historic air photo preprocessing