Detail enhancement can refer to an embedded electronic circuitry or a software process that adds contrast and produces clearer outlines to images.
In analog television technology, a detail enhancement circuit splits the incoming video signal and sends it along two
paths: one path ignores the split signal, while the other modifies the black-to-white transitions in such a way that many objects appear sharper. The two paths are then joined, resulting in a better image. Similar technology was used in VCR technology to produce sharper images.