Image Enhancement
Further information: Viewing instrumentThe first optical instruments were telescopes used for magnification of distant images, and microscopes used for magnifying very tiny images. Since the days of Galileo and Van Leeuwenhoek, these instruments have been greatly improved and extended into other portions of the electromagnetic spectrum. The binocular device is a generally compact instrument for both eyes designed for mobile use. A camera could be considered a type of optical instrument, with the pinhole camera and camera obscura being very simple examples of such devices.
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“Lear. Thou hast seen a farmer’s dog bark at a beggar?
Gloucester. Ay, sir.
Lear. And the creature run from the cur? There thou mightst behold the great image of authority: a dog’s obeyed in office.”
—William Shakespeare (1564–1616)