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Plane Mirrors
Published in Abdul Al-Azzawi, Light and Optics, 2018
Plane mirrors are made from a piece of glass polished on one side. If one stands before a plane mirror, one sees an upright image of oneself as far “behind” the mirror as one’s position in front of it. All plane mirrors form an upright image equal to the height of the object placed in front them. If one raises one’s right hand, the mirror image raises its left hand. Lettering read in a plane mirror is reversed right to left as well. This is the reason why writing on emergency vehicles, such as ambulances and police cars, is reversed right to left. Thus, when a driver looks into the mirror of his car, the writing can easily be read, and he can give room to emergency vehicles passing through.
Plane Mirrors
Published in Abdul Al-Azzawi, Photonics, 2017
Plane mirrors are made from a piece of glass polished on one side. If one stands before a plane mirror, one sees an upright image of oneself as far “behind” the mirror as one’s position in front of it. All plane mirrors form an upright image equal to the height of the object placed in front them. If one raises one’s right hand, the mirror image raises its left hand. Lettering read in a plane mirror is reversed right to left as well. This is the reason why writing on emergency vehicles, such as ambulances and police cars, is reversed right to left. Thus, when a driver looks into the mirror of his car, the writing can easily be read, and he can give room to emergency vehicles passing through.
Fast binary shape categorization
Published in The Imaging Science Journal, 2019
A mirror image is an image that has been reflected through a symmetry line. To match mirror images, we perform, for the same query image, a normal and an inverse matching. In normal matching, the keypoints of the query are matched to the keypoints of the model following a clockwise direction. In inverse matching, only the keypoints of the model follow a clockwise path. The keypoints of the query are matched in a counter-clockwise direction. This is undertaken instead of computing a new descriptor for the mirror image because our descriptor produces the keypoints at the same relative position for both an image and its mirror version. Matching that yields the minimum distance between normal and inverse is chosen as the optimal match.