Signal processing and interpretation of images

Underdrawings 

Imperial and National Gallery researchers have used a new algorithm to help visualise hidden drawings beneath Leonardo da Vinci's Virgin of the Rocks. 

Further reading

• New algorithm helps uncover forgotten figures beneath da Vinci painting

Scientific literature

• Revealing Hidden Drawings in Leonardo’s ‘the Virgin of the Rocks’ from Macro X-Ray Fluorescence Scanning Data through Element Line Localisation
• Classification and Detection of Symbols in Ancient Papyri
• Interactive Image Reconstruction from its Incomplete, Irregular and Imprecise Fragments