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Topic: Fechner color

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In the News (Fri 20 Apr 18)

  Fechner color - Wikipedia, the free encyclopedia
Fechner color is an illusion of color seen when looking at certain rapidly changing or moving fl-and-white patterns.
It is most commonly demonstrated with a device known as Benham's top.
The effect was noted by Gustav Fechner and Hermann von Helmholtz.
en.wikipedia.org /wiki/Fechner_color   (77 words)

 Gustav Fechner - Wikipedia, the free encyclopedia
Unfortunately, from the tenable theory that the intensity of a sensation increases by definite additions of stimulus, Fechner was led on to postulate a unit of sensation, so that any sensations might be regarded as composed of n units.
Fechner also studied the still-mysterious perceptual illusion of Fechner color, whereby colors are seen in a moving pattern of fl and white..
In his last work Fechner, aged but full of hope, contrasts this joyous "daylight view" of the world with the dead, dreary "night view" of materialism.
en.wikipedia.org /wiki/Gustav_Fechner   (740 words)

 GUSTAV THEODOR FECHNER - LoveToKnow Article on GUSTAV THEODOR FECHNER   (Site not responding. Last check: 2007-10-20)
The most famous outcome of his inquiries is the law known as Webers or Fechners law which may be expressed as follows: In order that the intensity of a sensation may increase in arithmetical progression, the stimulus must increase in geometrical progression.
Unfortunately, from the tenable theory that the intensity of a sensation increases by definite additions of stimulus, Fechner was led on to postulate a unit of sensation, so that any sensation s might be regarded as composed of n units.
Still, the idea of the exact measurement of sensation has been a fruitful one, and mainly through his influence on Wundt, Fechner was the father of that new psychology of laboratories which investigates human faculties with the aid of exact scientific apparatus.
67.1911encyclopedia.org /F/FE/FECHNER_GUSTAV_THEODOR.htm   (782 words)

 Mind, Brain, and the Experimental Psychology of Consciousness
Fechner may have set out to counter materialist metaphysics; but he was a well-trained, systematic experimentalist and a competent mathematician and the impact of his work on scientists such as Helmholtz, Ernst Mach, A.W. Volkmann, Delboeuf, and others was scientific rather than metaphysical.
Since the laws of color mixture suggest that virtually all hues can be obtained by various combinations of three primary colors, it seemed to Helmholtz that the perceived hue, brightness, and saturation of color must be derived from varying activity in three primary kinds of nerve fibers in the eye.
Experimental psychology, born with Fechner, nurtured by Helmholtz and Donders, was to be raised by Wundt.
serendip.brynmawr.edu /Mind/Consciousness.html   (2355 words)

 Weber Fechner Law   (Site not responding. Last check: 2007-10-20)
Fechner is a lunar crater that lies on the far side of the Moon's southern hemisphere, attached to the western rim of the large Planck walled-plain.
This satellite crater 'Fechner C' is surrounded by a blanket of light-hued ''ejecta'' that spills across the southwestern half of Fechner's interior floor.
The crater rim of Fechner is relatively worn and eroded, with the eastern half of the rim reshaped due to the valley and proximity to the Planck crater.
www.wwwtln.com /finance/202/weber-fechner-law.html   (1029 words)

 [No title]
Fechner was not always the champion of Fechner (logarithmic) scaling and he revised his ideas on this topic; this was an active area of controversy in the 1870s and 1880s.
Müller was also responsible for explanation of psychophysical judgment of weight lifting in terms of muscle response, thus emphasizing his deep commitment to physiological explanation of psychophysical results; he had a theory of absolute impression, one of the major attempts to provide a psychological theory for the nature of the sensation which is responded to.
The development of color theory is often portrayed as an unrelenting combat between the theories of Helmholtz and Hering, and the incompatibility of the two theories seems to have been a common idea in the 1920s.
www.chss.montclair.edu /psychology/haupt/shaper2a.html   (6621 words)

 essay 1
Color perception can be divided into 12 unique colors forming a color circle wherein analogous colors are the most closely related colors and complementary colors are the most distantly related colors.
Points in between the12 fundamental color positions are successively filled as the squared harmonic numbers increase so that as the squared harmonic series approaches infinity the generated analogous color spectrum approaches a continuous frequency range.
The fact that the square of the harmonic series of numbers shows a connection between the harmonic color pattern and the EM color pattern, and that there exists a perceptual, comparative relationship between colors and tones, means that the squared harmonic series is the perceptual/physical connection between harmonic waves and EM waves.
www.spectrummuse.com /essay_1.htm   (5621 words)

Fechner's panpsychism was also distinctive in its endorsement of a “world-soul” or “world-mind” of which everything is a part (there are obvious echoes of Spinoza in such a view).
For instance, in a maneuver reminiscent of Democritus, colors were banished from the world of matter, replaced with the “causal powers” of physical things to produce “in the mind” the experience we call color.
Although a clear scientific thinker Fechner was given to some rather mystical flights of fancy in defense of what he called the “day-view” (that is, the vibrant, open, panpsychist understanding of the world) as opposed to the dark and dead “night-view” of materialism.
plato.stanford.edu /entries/panpsychism   (11245 words)

 The science and mathematics of color
In order to produce colors other than cyan, magenta, and yellow, the inks are combined on the paper, either by depositing one layer of ink on top of another or by printing tiny dot of colored ink side-by-side.
You can try this yourself by means of the color mixing applet; click on the "color printing" tab; that allows you to vary the amount of ink deposited on the paper for each of the three process primary colors.
Color painting, using tempera or oil paints, differs from color printing in that many different colors of paints are available, whereas only four colors of ink are used in standard color printing - cyan, magenta, yellow, and fl.
www.inform.umd.edu /UMS+State/UMD-Projects/MCTP/Courses/ColorLesson   (2544 words)

 A Bibliography of Synaesthesia and Phonaesthesia
This bibliography treats the topics of synaesthesia and multi-modal cognition as they are discussed in the research literatures of cognitive science, linguistics and experimental psychology.
Dellatre, P., Liberman, A.M., Cooper, F.S., and Gerstman, L.J. An Experimental Study of the Acoustic Determinants of Vowel Color; Observations on One- and Two-Formant Vowels Synthesized from Spectrographic Patterns.
The Color Blue: Its Use as a Metaphor and Symbol.
www.flong.com /synesthesia/index.html   (6123 words)

 The Magic of Robert-Houdin   (Site not responding. Last check: 2007-10-20)
The works of Christian Fechner have been issued in extremely limited editions and all copies have sold out within weeks.
Bids in various recent public auctions have shown that the value of these books has increased to four times their original price, much to the satisfaction of the wise bibliophiles who purchased them in time.
Fechner has uncovered the story behind the scenes of Robert-Houdin's life, magic, and writings and illustrated his discoveries with 1200 rare photos, playbills, and other treasures, with over 60 full-color pages.
www.miraclefactory.org /RHInfo.html   (273 words)

 Benham's Top
Fechner (1838) was the first to describe this phenomenon.
The curious point is that when this disc is revolved, the impression of concentric circles of different colors is produced upon the retina.
Fechner GT (1838) Ueber eine Scheibe zur Erzeugung subjectiver Farben.
www.michaelbach.de /ot/col_benham   (527 words)

 [No title]   (Site not responding. Last check: 2007-10-20)
After Prevost, they were studied by Fechner, and the scientific literature sometimes refers to the appearance of color, where it doesn't exist, as Prevost-Fechner-Benham subjective colors.
It should be made clear that the "color" observed with a rotating disc, or cylinder, really does not exist.
A complete explanation of the observance of subjective colors lies in the secrets of human color perception and awaits further scientific research.
home.frognet.net /~ejcov/benham.html   (984 words)

 ETF - Butterfield Color System
In use, a proprietary Color Encoder is attached to an ordinary fl- and-white television camera lens.
Second, the fact that the system works to give color summation via the three Prevost-Fechner-Benham “primaries” is apparently a new discovery.
Finally, it should be noted that Butterfield’s Color Encoder may be used in front of a live TV camera, or with a motion picture camera (fl- and-white), or its effect may be dubbed by using an identical sequence of colored illuminants upon the scene to be shot.
www.earlytelevision.org /butterfield.html   (305 words)

 Contrast and Color   (Site not responding. Last check: 2007-10-20)
If you can detect color, you are in class 2.
In class 2, threshold contrast and perception of luminance difference follows a ratio "law." This is called the Weber-Fechner law.
As the first is in Latin and the second in German, the English-reading reader may prefer to consult the discussion of the work in Woodworth and Schlosberg, 1938.) A "just noticeable" ratio of target to background is about 1.05:1.
www.pc.ibm.com /ww/healthycomputing/vdt13con.html   (549 words)

The constructive arts, on the other hand, always make use of extraneous material, such as color, wood, stone, or metal, with results that are not at the same time complete and visible.
The graphic and textile arts are grouped with that of painting; with sculpture, ceramics, relief-work, and every kind of engraving; the lesser decorative arts with painting and architecture.
At the same time, it remains true that high art can never be wholly dissected by the methods of the exact sciences, but rather itself lays down in turn the governing norms which art expression should follow and, having once attained its proper perfection, is not longer dependent on such expression.
www.newadvent.org /cathen/01174c.htm   (2552 words)

 Fechner's Colors Are Induced By Flickering Monochromatic Light (ResearchIndex)   (Site not responding. Last check: 2007-10-20)
Abstract: Fechner described the phenomenon of inducing illusory colors by means of rotating fland -white disks.
The induced spectral illusions were later termed 'Fechner's colors'.
Similar color perceptions can be induced by non-rotating stimuli even on computer screens.
citeseer.ist.psu.edu /550554.html   (161 words)

 elliot w. eisner: what can education learn from the arts about the practice of education?
It was the early psychologists who were interested in making psychology a scientific enterprise, one that emulated the work done in the so-called “hard sciences.” Their aim was to develop a physics of psychology; what they called psychophysics and, consistent with their mission, made laboratories rather than studios the venues for their work.
[1] People like Galton in England and Helmholtz and Fechner in Germany were among its leaders and even William James, Charles Spearman, and G. Stanley Hall made passage to Europe to learn the secrets and methods of those seeking to create a science of mind.
The temperature of a color might be a tad too warm, the edge of a shape might be a bit too sharp, the percussion might need to be a little more dynamic.
www.infed.org /biblio/eisner_arts_and_the_practice_of_education.htm   (5943 words)

 CVNet: CVNet - Fechner Day: 150th Anniversary
Fechner formulated his famous quantitative relation between mental
Fechner's law is S = K log I (the mental
Those interested in Fechner may wish to note that American philosopher Ken
www.visionscience.com /mail/cvnet/2000/0314.html   (273 words)

 Dog Lovers Bookshop: Children's Books
Coloring books and stickers are among our Arts and Crafts titles.
A colorful and consoling vision of heaven for dogs, suitable for all ages.
A Norfolk terrier and her pups are the focus of this picture book for children who want to understand how puppies are born and grow.
www.dogbooks.com /kids.htm   (5970 words)

 Psychology of Perception - Neuropsychology Version.   (Site not responding. Last check: 2007-10-20)
Circumstances under which Fechner's law is a good approximation.
History of two approaches to the problems of color.
The artists vs the scientists on color mixing: Leonardo on color, Newton on color.
orion.ramapo.edu /~rbecklen/perneur.htm   (413 words)

 Stiles' Fechner fractions   (Site not responding. Last check: 2007-10-20)
Mechanism Fechner fraction 1.087 2 (.087?) 3.087 4.019 4' --- 5.018 5' ---
The Fechner fraction is defined as the ratio of the increment threshold to the field intensity when the conditioning field has the same color as the test field and the increment threshold is raised by it to 10 times the zero-field value (see Stiles, 1959, p.
Stiles, W. Color vision: the approach through increment threshold sensitivity.
cvision.ucsd.edu /database/text/stiles/fechner.htm   (81 words)

 Benham's Top and Fechner Colors - Background   (Site not responding. Last check: 2007-10-20)
In all cases, the subjects tend to experience pale colors, called Fechner Colors (Brown, 1965).
If the fl lines immediately follow the fl period, the lines are supposed to be tinged with red and if a homogenous white period is interposed between the fl period and the fl lines the color tinge changes from green to blue depending on the length of the white illumination (Brown, 1965).
It is also my experience that there is a large degree of individual variability in the colors observed.
psych.hanover.edu /Krantz/BenhamTop/background.html   (335 words)

 Fechner Color Illusion #1 (linear motion)
Part of the pattern appears to me to be dark brown with yellowish edges.
I am particularly curious whether anyone who is totally color blind will be able to see the colors in this illusion.
It seems likely that this is possible, but you may not know that what you are seeing is color.
dogfeathers.com /java/fechner.html   (329 words)

 Topic 14: Pages 61-72: A Review by Doug Renselle of Henri Louis Bergson's 'Time and Free Will,' 1st translated English ...
S is proportional to S. (Our bold, color, bold violet italic problematics, and bold violet problematics.
The moment was inevitably bound to come at which science, familiarized with this confusion between quality and quantity, between sensation and stimulus, should seek to measure the one as it measures the other: such was the object of psychophysics.
In this bold attempt Fechner was encouraged by his adversaries themselves, by the philosophers who speak of
www.quantonics.com /Bergsons_Time_and_Free_Will_Topic_14.html   (3329 words)

 Fechner Day 2001 - Sessions   (Site not responding. Last check: 2007-10-20)
Conference banquet, including a presentation of a film about Fechner's life
''Fechner's Inner Psychophysics viewed from both a Herbartian and a Fechnerian Perspective''
Frank-Michael Schleif and Fechner Day Team; last final change at October 18
www.uni-leipzig.de /fechnerday/program/sessions.html   (360 words)

 Sensation and Perception   (Site not responding. Last check: 2007-10-20)
This highly visual and interactive site provides examples of several visual illusions (e.g., the necker cube and the Fechner color illusion) as well as illustrates a couple of visual perception phenomenon (e.g., stereoscopic animated hypercube).
Luke's Cataract and Laser Institute has a lot of resources on their site related to visual anatomy and disease.
Most of these exhibits are electronic versions from the museum floor; a few are unique.
www.bridgewater.edu /departments/psychology/websensation   (468 words)

 The Phenomenology of Attention Part 1: Color, Location, Orientation, and Spatial Frequency (ResearchIndex)   (Site not responding. Last check: 2007-10-20)
The Phenomenology of Attention Part 1: Color, Location, Orientation, and Spatial Frequency
Abstract: This report describes our attempt to conduct exact Nineteenth century sensory physiologists and psychologists were concerned with the phenomenology of attention.
Investigators, including Mach, Fechner, Wndt, Titchener, Mller, James and others, were concerned with the phenomenal quality imparted to objects by experiments on the effect of attention on the phenomenology of perception (Update)
citeseer.ist.psu.edu /595957.html   (169 words)

 [No title]
When the stick = is not there it is all one color, but when the stick is present there is = an illusion that one side is longer than the other.
When the stick is not there it is all one color, = but when=20 the stick is present there is an illusion that one side is longer than = the=20 other.
I looked at the fletchers color illusion, the demo shows bars that are fl and white that are moving from left to right and you can vary the speed of the movement.
lists.csbs.utah.edu /pipermail/psych3150/2001-December.txt   (16754 words)

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