Terms

Question 1

Ambient light

Answer 1

A directionless light source that uniformly distributes light in all directions, illuminating objects equally regardless of their surface orientation.

Question 2

Ambient Occlusion

Answer 2

A CG shading method that uses a type of global illumination to better compute self-shadowing of objects. Often used in compositing as part of a multiple-pass rendering workflow.

Question 3

Alpha Channel

Answer 3

The portion of a four-channel image that is used to store transparency information.

Question 4

Antialiasing

Answer 4

Techniques used to mitigate the artifacts caused by a lack of sufficient resolution.

Question 5

Aperture

Answer 5

1. In a lens, the size of the opening that light passes through (usually given in terms of its f-stop or t-stop). 2. In a camera body, the mask opening that defines the area of film that will exposed on each frame

Question 6

Aspect Ratio

Answer 6

A single number that is the result of dividing the width of an image by its height.

Question 7

But-mapped Image

Answer 7

An image that consists of a rectangular, two-dimensional array of pixels.

Question 8

Depth of field

Answer 8

The depth of field of a specific lens is the range of acceptable focus in front of and behind the primary focus setting. It is a function not only of the specific lens used but also of the distance from the lens to the primary focal plane, and of the chosen aperture. Larger apertures will narrow the depth of field, smaller aperture will increase it.

Question 9

Depth of focus

Answer 9

A term that is often improperly used when one wishes to refer to the depth of field. Depth of focus is a specific term for the point behind the lens (inside the camera body) where a piece of film should be placed so that the image will be properly focused.

Question 10

8-but image

Answer 10

Refers to any image containing 8 bits of color information per channel

Question 11

Gamma

Answer 11

1. In film, a measure of the contrasts of an image or emulsion, based on the slope of the straight-line portion of the characteristic curve. 2. A digital effect used to modify the apparent brightness of an image.

Question 12

Garbage Matte

Answer 12

A rough, simple matte that isolates unwanted elements from the primary element in an image.

Question 13

Hue

Answer 13

A specific color from the color spectrum, disregarding its saturation or value.

Question 14

Matte

Answer 14

An image used to define or control the transparency of another image.

Question 15

Matte channel

Answer 15

Another name for the alpha channel in a four-channel image.