An upside down view of the Down countryside - geograph

A flipped image is a static or moving image that is generated by a mirror-reversal of an original across a horizontal axis, making the image upside-down. In contrast, a '' flopped'' image is mirrored across the vertical axis, as in a conventional

mirror image A mirror image (in a plane mirror) is a reflection (physics), reflected duplication of an object that appears almost identical, but is reversed in the direction perpendicular to the mirror surface. As an optical phenomenon, optical effect, it r ...

.Ron Brinkmann
"The Art and Science of Digital Compositing: Techniques for Visual Effects"
Morgan Kaufmann Publishers (2008), pp. 132–3. ...shows examples.

Photography

Many large format cameras present the image of the scene being photographed as a flipped image through their viewfinders. Some photographers regard this as a beneficial feature, as the unfamiliarity of the format allows them to compose the elements of the picture properly without being distracted by the actual contents of the scene. The technique is meant to bypass or override the brain's visual processing which normally sees what is expected rather than what is there. Flipping is occasionally used as a ''

trompe-l'œil ; ; ) is an artistic term for the highly realistic optical illusion of three-dimensional space and objects on a Two-dimensional space, two-dimensional surface. , which is most often associated with painting, tricks the viewer into perceiving p ...

'' effect in scenes which incorporate reflections in a body of water. The image is deliberately inverted so that people slowly discern that something is 'not quite right' with the picture, and come to notice that it is upside down.

References

{{reflist Artistic techniques Graphics Printmaking Photographic techniques