Specular

Microscopy for 1,800 patients.

Here is the specular component animating.

And so previous studies had only focused on microscopy.

This is one thing, the specular highlights.

Microscopy, the standard WHO procedure, reaches from 40 to 60 percent reliability.

Assign the shininess, and also assign the specular color to be this.

The diffuse term drops off smoothly, but the specular suddenly drops to zero, giving a pretty bad result. By using the Lambertian dropoff, the specular term now fades properly.

One idea is to attenuate the specular term by the lumbersian fall off.

If both the specular and diffused components are multiplied by the same color the material

A final instance where things might go wrong is reflective objects that have specular reflections.

The graph of the angle between N and H, versus the specular intensity, is like this.

This reflection that we just saw on her latex, the hot specular highlight, that is a piece of styrofoam.

For example, if the specular component is given a white color, the object looks more like a shiny plastic.

Metals themselves are essentially all specular. Let me say that again, because all this time we've been living a lie.

Knowing that a missed patient by microscopy infects up to 15 people, healthy people, per year, you can be sure that we have saved lots of lives.

One technique worth mentioning with this reflection model is that you can get the specular highlight a different color than the diffuse components.

These bacteria were not uncovered sooner because they are also among the smallest of all Earth's organisms so minute that they cannot be seen with conventional optical microscopy.

In other words, just like diffuse, make the specular term drop off as the angle of the light to the surface becomes less straight.

Draws a stream of rising, undulating 3D bubbles, rising toward the top of the screen, with transparency and specular reflections. Written by Richard Jones 1998.

Note that the specular color is different than the material color. You should check the online documentation to make sure you're setting the right color.

Using the Lambertian N dot L term also eliminates a serious problem with specular falloff. You may have noticed it yourself with the basic Blinn Phong model.

We want, or we need specular highlights, something mirrored in the latex, like over here and over here, something like a tall, slim, but big, bright lightsource, which is mirrored.

I just want to briefly highlight, the blue rods are the scores of microscopy only at the five clinics in Dar es Salaam on a population of 500,000 people, where 15,000 reported to get a test done.

Now, if we turn the polarizers around just a little bit, we can actually bring that specular reflection of the skin back in, and you can see she looks kind of shiny and oily at this point.

And in that episode, I answer the question and I get a chance to explain what would normally be kind of dry topics optics, diffuse versus specular reflection, how light works, how light works on the retina, and even the etymology of color terms

And in addition, we've actually used polarizers on all the lights just like polarized sunglasses can block the glare off of the road, polarizers can block the shine off of the skin, so we don't get all those specular reflections to take this map.

So, if we use information that comes off of this specular reflection, we can go from a traditional face scan that might have the gross contours of the face and the basic shape, and augment it with information that puts in all of that skin pore structure and fine wrinkles.