Image Restoration/Introduction

Image Restoration is the recovery of an original image x[m,n] from a given degraded image y[m,n] with a priori/posteriori knowledge of the degradation process.

Image Restoration is not the same as Image Enhancement.

Ex. of Image EnhancmentEdit

  • Image Sharpening
  • Image editing

Ex. of Image RestorationEdit

  • Correcting a blurred Image caused by a moving camera.

Image restoration is a set of techniques for restoring historic photographs, sketches, and other archival images in digital format.

The primary software used in this module includes Adobe Photoshop CS3 Extended, GIMP, and Paint.NET.

Selecting a suitable imageEdit

  • High resolution
  • Well composed
  • If scanned, then scanned in high resolution on a clean scanner
  • No .jpg artifacting
  • Damage not too extensive

Image typesEdit

  • Pencil sketch
  • Pen and ink
  • Paintings
  • Engravings
  • Lithographs
  • Photography

Obsolete photography methodsEdit

  • Daguerrotype
  • Salt paper
  • Colloidon glass
  • Photochrom
  • Sheet Kodachrome

More rarely-seen artEdit

  • Chalk
  • Coloured pencils
  • Pastels
  • Etc.

Graphics informationEdit

  • Raster v. vector graphics