[adrianratnapala]

> High resolution refers many pixels.

That's correct, but only within our narrow jargon.

In optics, when I say "resolution", I mean the smallest distance (either angular or linear) beween two points that can be distinguished by the apperatus. E.g. "The CCD resolution is 10 microns per pixel". Not how many distinct points there are ("The CCD has 1024x786 pixels").

Sometime in the computer age, "resolution" became used for the latter meaning and so DPI had to be used where "resolution" was previously meant.

But don't blame people if they still use the original meaning.