Answer:
Sharpening then, is a technique for increasing the apparent sharpness of an image. ... It subtracts a blurred (unsharp) copy from the original image to detect any edges. A mask is made with this edge detail. Contrast is then increased at the edges and the effect is applied to the original image.
He's always harping on about lack of discipline. 2. She is always harping on the family's neglect of her. In fact we go to see her every week.