| One line summary | Duplicate images at different levels of rotation contained within collection |
| Detailed description | Scanned images provided by third party over several accessions. Later accessions contain duplicate images at different levels of rotation (1-2% to left). Comparison of selected images suggest that the images are visually identical, suggesting that they originated from the same source and that a processor rotated the images at a later date. It would be helpful to identify such images across a large collection. |
| Issue champion | Gareth Knight |
| Possible approaches | Text OCR, Map objects to vector using ImageJ |
| Context | Image Collection Context |
| AQuA Solutions | Identifying rotated duplicate images using pHash |
| Collections | East London Theatre Archive |