Tu brazo es el controlador ideal

Alana Herrero
Alana Herrero

Con un interés y accesibilidad a la técnica portátil, es decir, y la realidad virtual acercándose al tiempo histórico, tres estudiantes de la Universidad de Cornell: [Daryl Sew, Emma Wang, and Zachary Zimmerman] – busca transformar tu cuerpo en el controlador perfecto.

Ese es el objetivo final, al menos. Su prototipo consta de tres sensores de calibre magnético, giroscopio y acelerómetro de tres ejes Kionix (en la mano, el codo y el hombro) para rastrear el movimiento del brazo. Depender de una computadora para hacer la mayor parte del levantamiento de pesas, PIC32 en una camiseta, ¡oye, es un prototipo! – recibe datos de las tres posiciones comunes, transmitiéndolos a dicho ordenador vía serial, lo que hace un modelo 3D utilizable en un entorno virtual. Después de un breve ajuste, la configuración rastrea el movimiento del brazo con solo una pequeña variación en las lecturas durante unos minutos.

[Sew, Wang and Zimmerman] ven su proyecto como una alternativa fácilmente factible a los sistemas de alta calidad que existen actualmente en las industrias de juegos, realidad virtual, fitness y medicina. No podemos esperar hasta que podamos combinar esto con el seguimiento de un solo dedo.

Si al ver este proyecto se acercó al tema de la creación rápida de prototipos, eche un vistazo [Ben Krasnow’s] consejos sobre el tema de su chat SuperCon. También nos gustaría llamar su atención. [Bodo Hoenen’s] hablar sobre un sistema que utiliza la electromiografía para captar el movimiento de los músculos del brazo.

  • Arcilla dice:

    Nuevamente, ciertamente hay mejores formatos para video que un excelente formato de animación pasado de moda que solo permite 256 colores.

    • Halcón Estelar dice:

      … y gente con límites de ancho de banda y poco dinero para que sus editores mastiquen con excesos.

      • Steven Gann dice:

        Teniendo en cuenta que la página de inicio de Google pesa más que ese GIF durante la mayoría de las vacaciones, es posible que desee obtener una conexión a Internet más actualizada.

    • Steven Gann dice:

      Realmente no.

      Puede insertar un video normal, pero eso consumirá MUCHO más ancho de banda y, por lo general, requiere un juguete integrado. La reproducción automática de videos también es objetivamente mala.

      Existe GIFV, que es un formato optimizado mejor en todos los sentidos, pero no es compatible de forma nativa en la mayoría de los sistemas. APNG es básicamente un GIF pero con una compresión PNG excelente, pero tampoco es compatible de forma nativa en ninguna parte.

      Y ya sea que elija GIF, video pesado o GIFV o APNG envuelto en un widget de reproductor HTML, seguirá recibiendo comentarios quejándose de que los 5 MB de datos son demasiado para ellos porque usan un módem telefónico en Apple][, apparently.

      • Miles says:

        where I live there is no DSL no cable and I pay dearly for a wi-fi hotspot, and 5MB here 5MB there does add up. I can get good bandwidth and I am using under 5 year old computers but have no alternative to expensive internet so please don’t mock people like me for complaining about gratuitous use of data streams.

        • meh says:

          *Mocks you*

        • Anonymous says:

          Do you have images turned off? You should be able to manually load just the images you want in most modern browsers. (Or use RSS to just get the articles.)

          Maybe set up a hosted VM like a Digital Ocean droplet (or a colocated Mac Mini) and run a web compression proxy on it? Squid and ZIProxy can recompress still images and compress text, all with the aim of taking up less bandwidth.

        • Whatnot says:

          Yes indeed, billions of us should all have text-only internet because a handful not only has poor internet but also can’t figure out things like blocking GIF files.

          Or not.

        • Steven Gann says:

          1. Get a browser that can block images, Javascript, and other content much larger than one piddly GIF. Even Netscape had the ability to block images, so I’m guessing it’s a user ignorance matter.

          2. Do you e-mail complaints to La-Tecnologia about the numerous images, JS files, and other resources that load on the homepage alone? The front page weighs more than that GIF, right now. Most Google holiday logos weigh more than that GIF, as do some Wikipedia pages. How do you manage outside of IRC and HTML4 pages left over from the 90’s?

          3. I reserve the right to mock anyone who positions themselves as knowledgeable but doesn’t know basic concepts like how to operate a web browser. My mother can barely operate the TV but she figured out how to block images on her phone’s web browser to reduce data usage while she searches for knitting patterns, without my help. You’re less computer literate than she is.

          • Jan says:

            I guess that your mother is old and knows her way around a phone, but that doesn’t mean that you can compare everyone else with your mother and define her as a standard of computer literate. Or in other words call everyone else (who isn’t as smart as your mother) stupid. Talking like that about your own mother, isn’t very nice, is it?

            Also, I assume that you know everything there is to know about “Miles” because you attack him for his way he uses his browser. That isn’t very nice, have you ever considered that he could be older then your mother perhaps even be your grandfather and that he’s not as much into computers as you are. His comment isn’t such a strange request if you only care to think about it a little longer before you judge him.

            Perhaps a tip for a la-tecnologia-item. How to minimize content from then internet. Tip, trick for webbuilders and tips and tricks for users. Now that would be usefull for all of us. And in case of dicussions like this, we can all simply link to that item and from there on keep concentrating about the hacks (and comment those instead of the article).

            Kind regards,
            Jan

          • Steven Gann says:

            If someone is on La-Tecnologia, it stands to reason they are technically competent enough to use a computer. If Miles is indeed not a technical person I would be thoroughly surprised given his knowledge of bandwidth and such, and how often he comments here about things like “not a hack” and criticizing Arduino users, but that would justify his not knowing how to work a web browser.

            Even then, his arguments are pointless, as are yours.

            >”How to minimize content from then internet.”

            Easy, make it text only and send the entire Internet back to 1980, i.e. the decade you and Miles would feel more at home. It’d save la-tecnologia.commenters the immense burden of having to disable images. We’ll just ban all videos, multimedia, and all other non-text content because some people can’t go to the trouble of blocking it themselves. Frankly, Miles spent more bandwidth writing his comments than that GIF required. That GIF probably cached and was only downloaded once. The HTML content of these comments are reloaded fresh every single time Miles comes back to check on the comments. If he came back twice we already consumed more precious bandwidth than that GIF. Then there’s the video player embedded here in this same page. the YouTube player loads along with the rest of the page and cannot be cached, and between the JS, CSS, and thumbnail image resources you’re looking at well over 10MB every single time Miles opens the page!

            If Miles is so concerned about bandwidth usage, that puny little GIF isn’t going to have anywhere near as much as his general, wasteful browsing habits, and stripping the Internet of multimedia that everyone else enjoys just so one user doesn’t have to be bothered to learn how to use Netscape correctly is unrealistic and ultimately detrimental.

            But by all means, continue watching 200MB YouTube videos while insisting that a 5MB GIF is an excessive burden on your bandwidth.

      • Jan says:

        So If I understand correctly, it is OK to do something stupid because other people are doing stupid things also?!?!? If we keep increasing the internet traffic by stupid/useless many Megabyte sized animations on every page then where are we heading. The problem seems to be that nobody seems to care any more about resources of any kind… “because we can” somehow has changed into “because we must” and for what reason.
        Resources are being wasted and for what? An endless repeating image of a girl waving her arm, or a guy on a snowscooter, a gate open and closing automatically, seriously why?

        Despite the fact that these animations are completely useless, they also distract when trying to read the content around it.

        I seriously feel sorry for people on less privileged internet connections, which has nothing to do with old or outdated, sometimes there are real limits you just can’t change as a end-user. And these are the kind of people that rely on hacks to get through life, so they need la-tecnologia…

        • Miles Togoh says:

          Thank you, I have better things to do with my time than constantly searching for the latest garbage removal software, I have enough trouble with ad blocking and tracking as it is.

        • Steven Gann says:

          >Resources are being wasted and for what?

          …because pixels are a limited resource? Putting a 5MB GIF in a webpage isn’t going to destroy the rainforests. If bandwidth is such a big concern, I’d think the massive YouTube player would bother you a lot more than the puny GIF. If anything, the GIF saves bandwidth because now there’s no reason to stream the whole ~200MB video unless you want to see more. Granted, by loading this page you loaded the YouTube player which already preloaded maybe 20-30MB of the video, wasting that precious bandwidth.

          I wonder if you apply this sort of logic to other aspects of your life. Do you wash/wax your car daily to reduce gas consumption… but also store bricks of lead in your trunk? Do you order two jumbo cheeseburgers and a diet soda?

      • Max says:

        Actually, I’m in the process of figuring out how to block animated gifs (and only those) on la-tecnologia right now. Rest assured, it shall be done (just as I got rid of the craptacular “pharaoh cartouches” surrounding names). I can always tell there are some on the page I’m scrolling through, by virtue of a suddenly howling CPU fan and a frozen-up Firefox for a minute or so. No thanks. If I want moving pictures, I’m perfectly capable of pressing a play button, thankyouverymuch. Actually, this gives me an idea…

    • Blue Footed Booby says:

      I prefer gifs for short, simple loops where color accuracy isn’t at all important.

      All newer formats like mp4 get (rightly) blocked by default until clicked by noscript, et al. Gifs are pure images, loop correctly automatically on all browsers, and really aren’t very large in file size for a loop this short.

      • Steven Gann says:

        Amen. It’s a 6MB file. That’s tiny compared to just the WordPress bloat that loads with the page.

  • Internet says:

    I have always wondered if you could combine this type of tech with a digital arm model that also was tracking exactly what was touching it where by using this below tech and then use them both to achieve even better resolution and accuracy (or even just another layer of incoming data).

    Combine enough small, high accuracy sensors together with well written software and some decent battery life and you are starting to get somewhere.

    • el gancho dice:

      Esto es muy interesante. Gracias.

      Pensé en un sistema similar para reconocer, por ejemplo, fracturas en un fuselaje. Quizás podría usarse en un teléfono inteligente para el reconocimiento del usuario.

  • Que no dice:

    Vaya, esa gente de Cornell es tan inventiva y nadie ha probado esto …

    Escuché que ahora están trabajando en un proyecto secreto en el que están calentando una pequeña varilla de metal para que fluya algo de metal de bajo punto de fusión para conectar los cables.

    • Max dice:

      No seas tonto, eso sería brujería.

  • EmJay dice:

    Perception Neuron tenía huellas de manos / dactilares en realidad virtual en CES a través de IMU. Es un buen sistema, pero la operación lo hace utilizable en solo unos minutos.

    • Steven Gann dice:

      La deriva de la IMU es un problema grave, y la principal razón por la que todavía prevalecen los sistemas visuales desagradables y saltados.

      Tenía un amigo que no me creía cuando le expliqué que los pequeños errores en las mediciones de IMU resultaban en una desviación masiva después de que se integraron dos veces. Para demostrarlo, escribí una simulación primitiva en la que se escribía un objeto para seguir una ruta circular. Trabajo disparando 60 veces por segundo, obteniendo las coordenadas xey actuales, y restando de las coordenadas anteriores para obtener la velocidad horizontal y vertical, y finalmente restando múltiples medidas de velocidad para obtener la aceleración horizontal y vertical. Para simular el ruido, agregó o restó un número aleatorio entre 0 y 0.005% del valor calculado.

      Una segunda función tomaría los valores de aceleración y los integraría dos veces y agregaría los resultados para obtener un desplazamiento X e Y desde la posición inicial, y dibujaría un círculo donde calculó que debería estar el objeto. El círculo primero coincidiría con el movimiento del objeto, pero rápidamente comenzaría a desplazarse en una dirección aleatoria. Eliminé el ruido simulado y todavía había mucha deriva mientras se acumulaban errores de redondeo diminutos.

      • Sam Pak dice:

        Bueno … después de ver el video, parece que hicieron muchos trucos para minimizar los errores y tratar de cancelar el ruido …

        Mencionaron las breves llegadas del sistema en la conclusión de su artículo / informe.

        Ciertamente más duro que yo cuando estaba en la universidad.

  • Libro de computadora dice:

    Si Miles se preocupa tanto por el uso de la banda ancha, este GIF barato no tendrá a nadie tan cerca como sus hábitos de navegación generales y derrochadores, y privará de una Internet multimedia que todos disfrutan para que un usuario no tenga que hacerlo. molestarse en aprender a utilizar Netscape correctamente es poco realista y, en última instancia, perjudicial. el reproductor de YouTube se carga junto con el resto de la página y no se puede almacenar en caché, y entre los recursos de JS, CSS y miniaturas, ve más de 10 MB cada vez que Miles abre la página.

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