Typical scenarios within this site’s subject: questions to ask, materials to prepare and points that can be examined.
Typical scenarios
If a panel looks yellowish in one photograph and grey in another, this may be attributed to coating change. Yet lighting and camera settings differ. Assess whether colour comparison is possible before transferring an image difference to the object's condition.
Typical scenarios
If a photographic report treats square patches around an object as insertion traces, compression and repeated saving need checking as alternatives. Several explanations may be possible, so the specific materials are examined in full, preserving information about their provenance and preparation conditions. The proposition to be tested is defined before comparative assessment of the features.
Typical scenarios
If similar patches recur in a wall photograph, they may be taken as copying traces, although the surface itself may have a regular pattern. Several explanations may be possible, so the specific materials are examined in full, preserving information about their provenance and preparation conditions. The proposition to be tested is defined before comparative assessment of the features.
Typical scenarios
If a photograph is used to estimate a panel defect, a nearby ruler may lie behind the surface being examined. In a typical situation, the photograph is oblique and the parties calculate length from pixel ratios without checking camera distance or the position of the reference object.
Typical scenarios
If a damage claim relies on a bright line in a photograph, the image's evidential capabilities need assessing first. Suppose photographs show the same area under different lighting, but the item itself is unavailable.
Typical scenarios
If two parties provide similar event photographs with different file dates, those dates alone do not prove separate photo sessions. A field may describe capture, saving, export or copying. Original files and an account of how each reached the supplied set are important.
