How to transform a Plot or a ParametricPlot into a Region

Question

I can get a Region from a Graphics like this:

But how can I transform the graphics in a Plot or a ParametricPlot into a Region?

ParametricPlot[{Sin[u], Sin[2 u]}, {u, 0, 2 Pi}]

Plot[Sin[x], {x, 0, 6 Pi}]

Answer 1

Use ParametricRegion instead of Plot/ParametricPlot to obtain an exact region. Alternatively use DiscretizeGraphics on the output of Plot/ParametricPlot to approximate it as a region.