Visual Acuity and Perception PDF

Excerpt from: Ar. Franz Allan Rodriguez Modified by: Ar. Robert Z. Salonga  VISUAL ACUITY AND PERCEPTION READ: fi yuo cna raed tihs, yuo hvae a sgtrane mnid, too. Cna yuo raed tihs? Olny 55 plepoe tuo fo 100 anc. i cdnuolt b...

Excerpt from: Ar. Franz Allan Rodriguez Modified by: Ar. Robert Z. Salonga  VISUAL ACUITY AND PERCEPTION READ: fi yuo cna raed tihs, yuo hvae a sgtrane mnid, too. Cna yuo raed tihs? Olny 55 plepoe tuo fo 100 anc. i cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The phaonmneal pweor of the hmuan mnid, aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it dseno't mtaetr in waht oerdr the ltteres in a wrod are, the olny iproamtnt tihng is taht the frsit and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can sitll raed it whotuit a pboerlm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. Azanmig huh? yaeh and I awlyas tghuhot slpeling was ipmorantt! If you can read this, your brain is 50% faster than those who can't VISUAL ACUITY AND PERCEPTION  VISUAL ACUITY AND PERCEPTION HOW MANY F’s DO YOU SEE? There are six F's in the sentence. A person of average intelligence finds three of them. If you spotted four, you're above average. If you got five, you can turn your nose at most anybody. If you caught six, you are a genius.  VISUAL ACUITY AND PERCEPTION HOW MANY CUBES ARE THERE? VISUAL ACUITY AND PERCEPTION  VISUAL ACUITY AND PERCEPTION HOW MANY COLORS WERE USED? VISUAL ACUITY AND PERCEPTION VISUAL ACUITY AND PERCEPTION  VISUAL ACUITY AND PERCEPTION PERCEPTION  It is the process by which we organize & interpret the patterns of stimuli in our environment, the immediate intuitive recognition, as an act of aesthetic quality. Acuity – it increases with the increase in the intensity of illumination.  VISUAL ACUITY AND PERCEPTION PERCEPTION  VISUAL ACUITY AND PERCEPTION PERCEPTION  VISUAL ACUITY AND PERCEPTION PERCEPTION Spatial Perception  Man uses two eyes for the perception of objects in nature & continually shifts his focus on attention. In so doing, two different types of vision are used:  B.1.1. Stereoscopic - is the ability to overlap views, which are slightly different, into one image. The visual process created an illusion of a 3- dimensional depth making it possible to judge distances.  B.1.2. Kinesthetic – man experiences space in movements of the eye from one part of a whole work of art or another. Space is experienced while viewing a two-dimensional surface because we unconsciously attempt to organize its separate parts so that they can be seen as a whole.  VISUAL ACUITY AND PERCEPTION PERCEPTION Figureground  A phenomenon wherein drawings consisting black lines, any line which surrounds an area, and which is recognized as representing an object is quickly picked by the observer.  We always perceive the ground side as being shapeless and extended behind the figure, never seeing both shapes simultaneously.  VISUAL ACUITY AND PERCEPTION PERCEPTION Figureground  VISUAL ACUITY AND PERCEPTION PERCEPTION Figureground  This ambiguous image shows either a lady peering at herself in her mirror, or a grinning skull. To see the skull, back up a distance from the picture.  Entitled "All Is Vanity", this certainly is one of the most famous optical illusions of all time.  Drawn by Charles Allen Gilbert in 1892, the illustration was not seen by the mass public until 1902 when it appeared in a magazine.  VISUAL ACUITY AND PERCEPTION PERCEPTION Figureground  VISUAL ACUITY AND PERCEPTION PERCEPTION Impossible Figures  A type of optical illusion consisting of a two- dimensional figure which is instantly and subconsciously interpreted by the visual system as representing a projection of a three- dimensional object although it is not actually possible for such an object to exist (at least not in the form interpreted by the visual system).  VISUAL ACUITY AND PERCEPTION PERCEPTION Impossible Figures  VISUAL ACUITY AND PERCEPTION PERCEPTION Impossible Figures Escherian Stairwell  VISUAL ACUITY AND PERCEPTION PERCEPTION Impossible Figures Relativity (M. C. Escher) Waterfall (M. C. Escher)  VISUAL ACUITY AND PERCEPTION PERCEPTION Impossible Figures The Penrose triangle, also known as the Penrose tribar, is an impossible object. It was first created by the Swedish artist Oscar Reutersvärd in 1934.  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  Characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source.  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, color, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences.  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  Trompe-l'oeil - is an art technique involving extremely realistic imagery in order to create the optical illusion that the depicted objects exist in three dimensions. Forced perspective is a comparable illusion in architecture.  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  VISUAL ACUITY AND PERCEPTION VISUAL / OPTICAL ILLUSIONS  VISUAL ACUITY AND PERCEPTION PERCEPTION OF SPACE, DEPTH & DISTANCE  An important feature of our perception of depth and solidity of objects is constituted by the shadows which are casts upon parts of them by the general illumination. Normally SHADOWS appear on the receding parts of object & indicates recession & hence solidity. 4 Types of Monocular Cues in depth perception: 1. Superposition – If the object appears to be cut off the view of another, we usually perceive the first objects as nearer.  VISUAL ACUITY AND PERCEPTION PERCEPTION OF SPACE, DEPTH & DISTANCE 2. Apparent Magnitude & Relative Size – If there is an array of like objects of different sizes, the smaller ones are perceived as being farther away.  VISUAL ACUITY AND PERCEPTION PERCEPTION OF SPACE, DEPTH & DISTANCE 3. Height in Place – As we look along a flat plane, objects farther away appear to be higher, so that we can create an impression of depth for objects of the same size by placing them on different heights.  VISUAL ACUITY AND PERCEPTION PERCEPTION OF SPACE, DEPTH & DISTANCE 4. Texture – For irregular surfaces such as rocks or waving surfaces of the ocean, there is gradient of texture with distance so that the ‘grain’ becomes finer as distances becomes greater. END OF PRESENATION