Lee later tells me that the lights themselves dont change shades; the perception of color change is simply my eyes adjusting to stationary illumination. It wont be the only time that my eyes deceive. After 20 minutes under the lights and a drool-inducing massage to the limbs, lee applies hydrating and uv-ray-protecting products to my face before handing me a mirror. What I see is a vibrancy in my complexion not spotted since my preteen years. And despite undergoing a number of extractions, my face isnt red, thanks to the light waves that purport healing. I follow my treatment with three blissful days of going makeup-free and looking bright, finally understanding how stars like alba can shine on the red carpet with just a bit of tinted moisturizer covering their visage.
lee, who cleanses and exfoliates the skin, then zaps bacteria in zitty regions with a high-frequency current. After performing manual extractions and applying a potent hyaluronic acid, peptide, and amino-acid serum to my skin, its time to flip the switch on the leds. The treatment employs a hinged panel of multiwavelength leds called LightStim that opens to be the size of two ipads. After covering both of our eyes, lee hovers the panel just centimeters from my face to ensure deep-light penetration, and illuminates its nearly 1200 leds within. Even with my eyes covered, the immaculately white light is so bright at first, i feel like ive died and gone to heaven. (It doesnt hurt that lee has taken to massaging my hands and arms while new Age spa music plays in the background.). This is perfectly normal, she assures, telling me that my eyes will adjust within the first few minutes. The overwhelming white seems to morph into shades of amber, as a subtle warmth blankets my face.
While the led facials we tried years ago employed a single wavelength of light to penetrate the skin and help repair the dermis, advancement in the technology has quadrupled the number of wavelengths that can be delivered at one time. An led facial with the latest technology can now deliver amber, light-red, deep-red, and infrared light simultaneously to the lower levels of the skin, sparking collagen production while reducing inflammation, speeding sauvage healing, and increasing circulation. Alternately, blue, red, and infrared can be combined to better destroy acne bacteria, while speeding healing and increasing circulation. These multiwavelength treatments one-up their predecessors feats of causing acne bacteria to self-destruct or helping plump skin to minimize wrinkles. Its also able to get oxygenation happening on a different cellular level and put skin in a state of healing, which reduces inflammation, explains beal. Meaning, you can go from treatment to black tie without any in-between redness. The 290 treatment costs as much as some hard-cased led light therapy masks that are making the rounds online, and aim to provide similar results. Arisa Ortiz, a dermatologist and director of laser and cosmetic dermatology. Uc san diego health System notes, while these are fairly safe overall, they tend to be lower-energy devices because theyre made for at-home use, so the results will be subtle if any. Though Ortiz notes that laser treatments may give more bang for my buck, she admits that the overall pricing for led facials is much less expensive.
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Getty/Design by candace napier, lED facials? We know the drill: Blue-light-emitting diodes have been shown to help clear acne, while red light can help address fine lines and kokosolie other signs of aging. After all, the technology has been a mainstay in spas and dermatology offices for more than a decade. So why are these treatments popping up on celebrity Instagram feeds as of late? (Were looking at you, jessica Alba. as, susan beal, the clinic director at the celeb-loved. Kate somerville skin health Experts Clinic in Los Angeles assures us, the renewed interest in led-charged skin care is not simply a #tbt thing.
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However, the image is dominated by the specular component, which will allow us to reconstruct high-resolution facial geometry. Going back to the full set of Emily images, we have subtracted the entire first row from the entire second row to produce a set of specular-only images of the face under different illumination conditions. The images of the face under the gradient illumination conditions will allow us to compute surface orientations per pixel. Building the Specular Normal Map. Computing the vector halfway between the reflection vector and the view vector yields a surface normal estimate for the face based on the specular reflection. Here we see the face's normal map visualized in the standard rgb xyz color map. The normal map contains detail at the level of skin pores and fine wrinkles.
In fact, the specular reflection is seen at double the strength of the subsurface (diffuse) reflection, since the polarizer on the camera blocks about half of the unpolarized subsurface reflection. This image shows the combined effect of specular reflection and subsurface reflection; to model the facial reflectance we would really like to observe the specular reflection all on its own. To do this, we can simply subtract the diffuse-only image from this one. Taking the difference between the diffuse-only image and the diffuse-plus-specular image yields this image of just the specular reflection of the face. The image is essentially colorless since this light has reflected specularly off the surface of the skin, rather than entering the skin and having its blue and green colors significantly absorbed by skin pigments and blood before reflecting back out. This image provides a useful starting point for building a digital character's specular intensity map, or "spec map".
Essentially, it shows for each pixel the intensity of the specular reflection at that pixel. However, the specular reflection becomes amplified near grazing angles such as at the sides of the face due to the denominator of Fresnel's equations; we generally model and compensated for this effect using Fresnel's equations but also tend to ignore regions of the face. The image also includes some of the effects of "reflection occlusion." The sides of the nose and innermost contour of the lips appear to have no specular reflection since self-shadowing prevents the lights from reflecting in these angles. Some of our lab's most recent work Ghosh. 2008 has shown that this sort of polarization difference image also contains effects of single scattering, where the light enters the skin but scatters exactly once off some element of the skin before reflecting to the camera. This light picks up some of the skin's mannen melanin color, adding a little color to the image.
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Every light in the light stage is turned on to equal intensity, and the polarizer on the camera is oriented to block the specular reflection from every single one of the polarized led light sources. Even the highlights of the lights in Emily's eyes are eliminated. This is about as flat-lit an image of a person's face as you could possibly photograph. And it's almost the perfect image to use as the diffuse texture map for the face if you're building a virtual character. The one problem is that its polluted to some extent by self-shadowing and interreflections, making the concavities around the eyes, under the nose, and between the lips somewhat darker and slightly more color-saturated than they should.
Depending on how you're doing your renderings, this is either a bug or a feature. For real-time rendering, it can actually add to the realism if this effect of "ambient occlusion" is effectively alreaddy "baked in". If new lighting is being simulated on the face using a global illumination technique, then it doesn't make sense to calculate new self-shadowing to modify a texture map that already has self-shadowing present. In this case, you can use the actor's 3D geometry to compute an approximation to the effects of self-shadowing and/or interreflections, and then divide these effects out of the texture image. This image also shows the makeup dots we put on Emily's face which help us to align the images in the event there is any drift in her position or expression over the fifteen images; they are relatively easy to remove digitally. Emily was extremely good at staying still for the three-second scans and many of her datasets required no motion compensation at all. We have already had some success at acquiring this sort of data in real time using high-speed video ma. This image of Emily is also lit by all of the light stage lights, but the orientation of the polarizer has been turned 90 degrees which allows the specular reflections to return. You can see a sheen of, and the reflections of the lights are now evident in her eyes.
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Most of the images are shot with essentially every light in the light stage turned on, but with different gradations of brightness. All of the light stage lights have linear polarizer film placed on top of them, affixed in a particular pattern of orientations, which lets us measure the specular and subsurface reflectance components of the face independently by changing the orientation of a polarizer on the. The top two rows show Emily's face under four spherical gradient illumination conditions and then a point-light condition, and all of these top images are cross-polarized to eliminate the shine from the surface of her skin (her specular component). What's left is the skin-colored "subsurface" reflection, often called the "diffuse" component: this is light which scatters within the skin enough to become depolarized before re-emerging. The right image is lit by a frontal point-light, also cross-polarizing the specular reflection. The middle row shows parallel-polarized images of the face, where the polarizer on the camera is rotated so that the specular reflection returns, and in double strength compared to the subsurface reflection. We can then see the specular reflection on its own by subtracting the first row of images from the second row. Separating Subsurface and Specular Reflection, here is a closeup of the "diffuse-all" image of Emily.
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The image to the left shows Emily in the light stage during a scan, with all 156 of its white led lights turned. Our previous light stage processes used to capture digital actors for films such. Spider Man 2, king Kong, superman Returns, Spider Man 3, and, hancock captured hundreds of images of the actor's face from every lighting direction one at a time. This allowed for very accurate facial reflectance to be recorded and simulated, though it required high-end motion picture cameras, involved capturing a great deal online of data, and required a custom face rendering system based on our siggraph 2000 paper. Nonetheless, studios such as Sony pictures Imageworks achieved some notable virtual actor results using these techniques. Captured Images, our most recent process requires only about fifteen photographs of the face under different lighting conditions as seen to the right to capture the geometry and reflectance of a face. The photos are taken from a stereo pair of off-the-shelf digital still cameras, and a small enough number of images is required, everything can be captured quickly in "burst mode" in under three seconds before the images even need to be written to the compact.
All the subtlety is there. This is no hype job, it's the real thing. I officially pronounce that Image metrics has finally built a bridge across the Uncanny valley and brought us to the other side." -peter Plantec, vfxworld, august 07, 2008. Introduction, over the last few years our lab has been cream developing a new high-resolution realistic face scanning process using our light stage systems, which we first published at the 2007 Eurographics Symposium on Rendering. In early 2008 we were approached by Image metrics about collaborating with them to create a realistic animated digital actor as a demo for their booth at the approaching siggraph 2008 conference. Since we'd gotten pretty good at scanning actors in different facial poses and Image metrics has some really neat facial animation technology, this seemed like a promising project to work. Image metrics chose actress Emily o'brien to be the star of the project. Jana hawkes on "The young and the restless" and was nominated for a 2008 daytime Emmy award. Emily came by our institute to get scanned in our Light Stage 5 device on the afternoon of March 24, 2008.
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The silicone digital Emily Project: Achieving a photoreal Digital Actor. Siggraph 2008 Expo / siggraph 2009 Computer Animation Festival / siggraph 2009 courses / cvmp 2009 / ieee cg a 2010. Oleg Alexander* mike rogers* William Lambeth* Jen-yuan Chiang. Wan-Chun ma Chuan-Chang Wang paul Debevec. Usc institute for Creative technologies, image metrics* "It is absolutely awesome - amazing. I'm one of the toughest critics of face capture, and even I have to admit, these guys have nailed. This is the first virtual human animated sequence that completely bypasses all my subconscious warnings. I get the feeling of Emily as a person.