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Eulerian Video Magnification

Eulerian Video Magnification
banner slider Many seemingly static scenes contain subtle changes that are invisible to the naked human eye. However, it is possible to pull out these small changes from videos through the use of algorithms we have developed. We give a way to visualize these small changes by amplifying them and we present algorithms to pull out interesting signals from these videos, such as the human pulse, sound from vibrating objects and the motion of hot air. Videos Software and Code Eulerian Video Magnification code Matlab code and executables implementing Eulerian video processing for amplifying color and motion changes. Phase Based Video Motion Processing code Matlab code for implementing the new and improved phase-based motion magnification pipeline. Videoscope Web interface for motion and color magnification. Publications (Magnifying Motion and Color Changes) Publications (Analysis of Small Motions) People Faculty: Students, Postdocs and Affiliates: Collaborators: Edward H. Talks Related:  Computer Vision

Welcome - OpenCV Wiki fMRI Evidence of ‘Mirror’ Responses to Geometric Shapes Mirror neurons may be a genetic adaptation for social interaction [1]. Alternatively, the associative hypothesis [2], [3] proposes that the development of mirror neurons is driven by sensorimotor learning, and that, given suitable experience, mirror neurons will respond to any stimulus. This hypothesis was tested using fMRI adaptation to index populations of cells with mirror properties. After sensorimotor training, where geometric shapes were paired with hand actions, BOLD response was measured while human participants experienced runs of events in which shape observation alternated with action execution or observation. Adaptation from shapes to action execution, and critically, observation, occurred in ventral premotor cortex (PMv) and inferior parietal lobule (IPL). Figures Citation: Press C, Catmur C, Cook R, Widmann H, Heyes C, et al. (2012) fMRI Evidence of ‘Mirror’ Responses to Geometric Shapes. Editor: Alessio Avenanti, University of Bologna, Italy Copyright: © 2012 Press et al.

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Human Interface Technology Lab - How the VRD works Using the VRD technology it is possible to build a display with the following characteristics: In a conventional display a real image is produced. The real image is either viewed directly or projected through an optical system and the resulting virtual image is viewed. With the VRD no real image is ever produced. Instead, an image is formed directly on the retina of the user's eye. The resulting modulated beam is then scanned to place each image point, or pixel, at the proper position on the retina. In the original prototype the faster horizontal scanning is accomplished with an acousto-optical modulator and the vertical scanning with a galvanometer to produce a 1280 pixel by 1024 line raster that is updated at 72 Hertz. To overcome the limitations of the acousto-optical modulator HITL engineers have developed a proprietary mechanical resonant scanner. After scanning, the optical beam must be properly projected into the eye.

Gettier and justified true belief: fifty years on | The Philosophers Magazine On the fiftieth anniversary of Gettier’s famous paper, Fred Dretske explains what we should have learned from it. This article appears in Issue 61 of The Philosophers’ Magazine. Please support TPM by subscribing. This is the golden – the fiftieth – anniversary of Edmund Gettier’s remarkable paper on why knowledge isn’t justified true belief. It seems like an appropriate time, therefore, to evaluate what we have learned – or should have learned – from his elegant counterexamples. Gettier’s paper had a tremendous impact on contemporary epistemology. Gettier’s counterexamples are constructed on the basis of two assumptions about justification, both of which were (at the time he made them) entirely uncontentious. 1: The justification one needs to know that P is true is a justification one can have for a false proposition. Almost all philosophers who aren’t sceptics accept 1 without hesitation. But, alas, accepting both 1 and 2 lands you in deep trouble. The problem is not solved.

GRADO DE ESTADÍSTICA Universitat de Barcelona Informació sobre: Idiomes Cercador Serveis Estudis de grau Inicio > Estudios y Docencia > Oferta formativa > Grados > E > GRADO DE ESTADÍSTICA ¿Qué se pretende con esta enseñanza? Formar profesionales de la estadística, capacitados para llevar a cabo las tareas específicas del proceso de análisis de la información y toma de decisiones, incidiendo en: La obtención y el tratamiento de datos. Imprimir la ficha del grado Enlaces de interés Acceso directo a: Omitir los accesos directos Mas información Servicio de Atención al EstudianteTel. 933 556 000 Fax 934 035 917Buzón de consultasHorarios, localización y transportes Síguenos: Miembro de: Dos Campus de Excelencia Internacional Footer © Universitat de Barcelona

Blinded by the Light: DIY Retinal Projection After grabbing a couple of Microvision SHOWWX laser picoprojectors when they went up on Woot a few months back, I started looking for ways to use them. Microvision started out of a project at the University of Washington HITLab in 1994 to develop laser based virtual retinal displays. That is, a display that projects an image directly onto the user’s retina. This allows for a potentially very compact see through display that is only visible by the user. The setup I built is basically what Michael Tidwell describes in his Virtual Retinal Displays thesis. Aside from my inability to find properly shaped mirrors, the big weakness of this rig is the size of the exit pupil. If you do want to build something like this, keep in mind that the title of this post is only half joking. blinded.scadblinded.stl Related Posts

"The mind is willing, but the flesh is weak": th... [Psychol Sci. 2012] Radically Cheap: The Story of Pat Delany, Open Source Machine Tools Advocate The ex-rancher felt empathy push his problem-solving mind into a new direction. He looked back at all those years he had tinkered with junk-built machine tools in his workshop — all that time spent poring over scans of antique how-to magazines looking for clever hacks to avoid having to buy new tools. It was fun and sometimes necessary for me, he thought, but what I’ve created here can also help many people. This is the story of Pat Delany, one of the leading creative voices in Appropriate Technology — technology that is small-scale, decentralized, labor-intensive, energy-efficient, environmentally sound, and locally controlled. This 78-year-old grandfather came to the field as an outsider, inspired by a second-hand description of a news photo. But his visionary home-built machine-tool designs now have the potential to help millions bootstrap themselves out of poverty. Delany had worked with machines for his entire life and built many machines for himself. The MultiMachine Lost Wisdom

Researchers amplify variations in video, making the invisible visible At this summer's Siggraph — the premier computer-graphics conference — researchers from MIT's Computer Science and Artificial Intelligence Laboratory (CSAIL) will present new software that amplifies variations in successive frames of video that are imperceptible to the naked eye. So, for instance, the software makes it possible to actually "see" someone's pulse, as the skin reddens and pales with the flow of blood, and it can exaggerate tiny motions, making visible the vibrations of individual guitar strings or the breathing of a swaddled infant in a neonatal intensive care unit. The system is somewhat akin to the equalizer in a stereo sound system, which boosts some frequencies and cuts others, except that the pertinent frequency is the frequency of color changes in a sequence of video frames, not the frequency of an audio signal. The prototype of the software allows the user to specify the frequency range of interest and the degree of amplification. Happy accident

Why Living in the Moment Is Impossible | University of Pittsburgh News « Tracing Knowledge … Στα ίχνη της Γνώσης Research done at Pitt shows that decision-making memories are stored in a mysterious area of the brain known to be involved with vision and eye movements Aug 8, 2012 PITTSBURGH—The sought-after equanimity of “living in the moment” may be impossible, according to neuroscientists who’ve pinpointed a brain area responsible for using past decisions and outcomes to guide future behavior. The study, based on research conducted at the University of Pittsburgh and published today in the professional journal Neuron, is the first of its kind to analyze signals associated with metacognition—a person’s ability to monitor and control cognition (a term cleverly described by researchers as “thinking about thinking.”) “The brain has to keep track of decisions and the outcomes they produce,” said Marc Sommer, who did his research for the study as a University of Pittsburgh neuroscience faculty member and is now on the faculty at Duke University. “You need that continuity of thought,” Sommer continued.

IEEE Global Humanitarian Technology Conference (GHTC) Calculating Speed using a Webcam Have you ever wanted to know how fast something is moving? Maybe you've wondered just how fast that car was going as it flew past your house. Maybe you want to clock your kid's soccer kick... There has got to be a way to calculate speed using a webcam! To get speed all we need is distance and time. So if we took two pictures of an object as it is moving, and knew the exact time they were taken we could just measure the distance the object moved between the two shots and viola! Using the timestamps on the photos, our turtle appears to have moved 8 inches in 28 seconds. This would be pretty easy if everything were moving along a ruler, but wouldn't it be great to get the distance somehow by simply counting the number of pixels between the two positions of the objects in the pictures, or better yet having the computer do this for us... How can this be automated? OK now we're on to something! Next we will try to clean it up a bit. What now? Now lets throw this concept into action.

Smelling a skunk after a cold: Brain changes after a stuffed nose protect the sense of smell Has a summer cold or mold allergy stuffed up your nose and dampened your sense of smell? We take it for granted that once our nostrils clear, our sniffers will dependably rebound and alert us to a lurking neighborhood skunk or a caramel corn shop ahead. That dependability is no accident. It turns out the brain is working overtime behind the scenes to make sure the sense of smell is just as sharp after the nose recovers. A new Northwestern Medicine study shows that after the human nose is experimentally blocked for one week, brain activity rapidly changes in olfactory brain regions. Previous research in animals has suggested that the olfactory system is resistant to perceptual changes following odor deprivation. "You need ongoing sensory input in order for your brain to update smell information," said Keng Nei Wu, the lead author of the paper and a graduate student in neuroscience at Northwestern University Feinberg School of Medicine.