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Digital photograph restoration is the practice of restoring the appearance of a digital copy of a physical photograph that has been damaged by natural, man-made, or environmental causes, or affected by age or neglect.
Digital photograph restoration uses
image editing
Image editing encompasses the processes of altering images, whether they are Digital photography, digital photographs, traditional Photographic processing, photo-chemical photographs, or illustrations. Traditional analog image editing is known ...
techniques to remove undesired visible features, such as dirt, scratches, or signs of aging. People use raster graphics editor
A raster graphics editor (also called bitmap graphics editor) is a computer program that allows users to create and edit images interactively on the computer screen and save them in one of many raster graphics file formats (also known as bitmap ...
s to repair digital images, or to add or replace torn or missing pieces of the physical photograph. Unwanted color casts are removed and the image's contrast or sharpening may be altered to restore the contrast range or detail believed to have been in the original physical image. Digital image processing
Digital image processing is the use of a digital computer to process digital images through an algorithm. As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing. It allo ...
techniques included in image enhancement
Image editing encompasses the processes of altering images, whether they are digital photographs, traditional photo-chemical photographs, or illustrations. Traditional analog image editing is known as photo retouching, using tools such as an ...
and image restoration software are also applied to digital photograph restoration.
Background
Agents of deterioration
Photographic material is susceptible to physical, chemical and biological damage caused by physical forces, thieves and vandals, fire, water, pests, pollutants, light, incorrect temperature, incorrect relative humidity, and dissociation (custodial neglect). Traditionally, preservation efforts focused on physical photographs, but preservation of a photograph's digital surrogates has become of equal importance.Handling practices
Fragile or valuable originals are protected when digital surrogates replace them, and severely damaged photographs that cannot be repaired physically are revitalized when a digital copy is made. Creation of digital surrogates allows originals to be preserved. However, the digitization process itself contributes to the object's wear and tear. It is considered important to ensure the original photograph is minimally damaged by environmental changes or careless handling.Permissible uses
Digitally scanned or captured images, both unaltered and restored image files are protected undercopyright
A copyright is a type of intellectual property that gives its owner the exclusive legal right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, ...
law. Courts agree that by its basic nature digitization involves reproduction—an act exclusively reserved for copyright owners. The ownership of an artwork does not inherently carry with it the rights of reproduction.
Images that are digitally reproduced and restored often reflect the intentions of the photographer of the original photograph. It is not recommended that conservators In certain areas of England, conservators are statutory bodies which manage areas of countryside for the use of the public.
Establishment, role and powers
Conservators are bodies corporate generally established, and granted their powers, by a ...
change or add additional information based on personal or institutional bias or opinion. Even without copyright permission, museums can digitally copy and restore images for conservation or informational purposes.
Gallery
See also
*Infrared cleaning
Infrared cleaning is a technique used by some film scanners and flatbed scanners to reduce or remove the effect of dust and scratches upon the finished scan. It works by collecting an additional infrared channel from the scan at the same posit ...
*Media preservation
Preservation of documents, pictures, recordings, digital content, etc., is a major aspect of archival science. It is also an important consideration for people who are creating time capsules, family history, historical documents, scrapbooks a ...
*Photo manipulation
Photograph manipulation involves the transformation or alteration of a photograph. Some photograph manipulations are considered to be skillful artwork, while others are considered to be unethical practices, especially when used to deceive. Mot ...
* Photograph preservation
References
External links
* Conservation and restoration of cultural heritage Science of photography Photographic techniques {{photography-stub