Sharpness, sometimes called "clarity", is an indicator that reflects the sharpness of the image plane and the sharpness of the image edges. If you turn the sharpness up, details on the image plane will have higher contrast and look clearer.
Images are the basis of human vision, an objective reflection of natural scenery, and an important source for humans to understand the world and humans themselves. "Picture" is the distribution of light reflected or transmitted by an object. "Image" is the impression or understanding of the picture in the human brain that is accepted by the human visual system. Photos, paintings, cliparts, maps, calligraphy works, handwriting sinology , faxes, satellite cloud images, film and television images, X-rays, electroencephalograms, electrocardiograms, etc. are all images.