What are reflectance maps?

A reflectance map compiles the relevant information about surface material, light source distribution, and viewing geometry into a single function. It is central to physics-based vision including shape from shading and photometric stereo.

Which map is used for reflection?

Sphere mapping represents the sphere of incident illumination as though it were seen in the reflection of a reflective sphere through an orthographic camera. The texture image can be created by approximating this ideal setup, or using a fisheye lens or via prerendering a scene with a spherical mapping.

What is reflectivity on radar?

“Reflectivity” is the amount of transmitted power returned to the radar receiver after hitting precipitation, compared to a reference power density at a distance of 1 meter from the radar antenna.

What is a reflectivity image?

Reflectivity images are just as they sound as they paint a picture of the weather from the energy reflected back to the radar. Reflectivity images are the vast majority of radar images you will see on television as well.

What is a diffuse map?

Diffuse Maps A Diffuse map is the most common kind of texture map. It defines the color and pattern of the object. Mapping the diffuse color is like painting an image on the surface of the object. For example, if you want a wall to be made out of brick, you can choose an image file with a photograph of bricks.

What is a metallic map?

Description: This property determines which parts of the surface are metal and are non-metal. A metalness map is a grayscale image where black pixels correspond to non-metals and white pixels correspond to metals. Metals only reflect light the same color as the metal, and they reflect much more light than non-metals.

What is an AO map?

Ambient occlusion (AO) maps simulate the self-shadowing that occurs in the edges and crevices of objects with complex details. AO passes are often rendered separately and layered on top of other rendered elements in a compositing package.

What is reflectivity factor?

Reflectivity is defined as simply “a measure of the of the fraction of radiation reflected by a given surface; expressed as a ratio of the radiant energy reflected to the total amount of energy incident upon that surface”.

What is roughness map?

Figure 31: The roughness map describes the surface irregularities that cause light diffusion. In this map, black (0.0) represents a smooth surface and white (1.0) represents a rough surface. The roughness map is the most creative map as it allows the artist to visually define the character of a surface.