superimposition
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/ˌsuːpərˌɪmpəˈzɪʃn/
🇬🇧
/ˌsuːpərˌɪmpəˈzɪʃn/
Placing one image over another so they are seen together
The artist used superimposition to blend the two photos.
Combining qualities of two systems or patterns
The new software allows for superimposition of different data sets.