Processing History
Definition
Record connecting a derivative to its inputs, operations and relevant parameters. A derivative should remain connected to its source files and documented operations. Cropping, correction, enhancement and compositing can affect what the image appears to show.
- Context
- Image evidence
For example, recording input files and correction settings lets a reviewer distinguish an original image from a processed presentation derivative.
Processing cannot create unrecorded detail reliably. Retain originals and distinguish analytical transformations from presentation changes.
Related terms
- Authentication
- The process of establishing that a document is what it purports to be. Under the US FRE Rule 901, the proponent must...
- Cryptographic Hash
- A fixed-length digest produced from a file's bytes by an algorithm such as MD5 (128-bit), SHA-1 (160-bit), or SHA-256 (256-bit). Identical files...
- Master Copy
- Preserved authoritative copy within the documented evidence workflow. Preserve the authoritative recording and document acquisition, versions and analysis. Authentication assesses particular claimed...