Graphics Definitions

Question 1

Affine Combination

Answer 1

A transformation that keeps parallel lines parallel but does not keep angles the same.

Question 2

Affine space

Answer 2

A basis in n-dimensions by which affine transformations can be defined.

Question 3

Aliasing

Answer 3

Sampling high frequencies at low frequencies causing errors. In images this happens when more detail occurs than can be sampled by a pixel. Can mitigate with anti-aliasing.

Question 4

Alpha Blending

Answer 4

When you have materials with transparency (alpha) and pixel colour is determined by mixing materials based on alpha.

Question 5

Ambient reflection

Answer 5

A way to approximate global illumination by adding light regardless of whether shadow rays touch the point.

Question 6

Anti-aliasing

Answer 6

Removing aliasing by improving sampling rates or other methods

Question 7

B-spline

Answer 7

Parameterized curve using second-order derivatives

Question 8

Backfacing polygons

Answer 8

[?] Faces whose normals point away from the view direction. i.e. the dot product of the normal and the view vector is positive.

Question 9

Barrel distortion

Answer 9

Warping of the image due to glass in the lens of a physical camera.

Question 10

Barycentric coordinates

Answer 10

[?] Coordinates within a square used to calculate linear interpolation

Question 11

Baud rate

Answer 11

The speed at which a beam in a crt monitor covers the screen

Question 12

Beam settling delay

Answer 12

Something about the laser in a crt

Question 13

Beam penetration crt

Answer 13

[?]

Question 14

Bézier

Answer 14

[?] A curve parameterized in a special way

Question 15

bitblt

Answer 15

Not sure

Question 16

Bresenham

Answer 16

The line for calculating which cells/voxels in a grid a line intersects with. Used for: spatial subdivision acceleration, occupancy grid mapping.

Question 17

BRM

Answer 17

[?]

Question 18

Bump Mapping

Answer 18

Perturbing normals when calculating lighting at a point in order to give the appearance of noisy textures

Question 19

Button

Answer 19

a user-interface item

Question 20

Callback routine

Answer 20

A routine that gets executed after the completion of another routine.

Question 21

Calligraphic display

Answer 21

[?]

Question 22

Cap Polygon

Answer 22

[?]

Question 23

Cathode

Answer 23

Cathode Ray Tube is a style of early monitor where a laser painted the picture onto a phosphorous coated screen.

Question 24

Chromaticity diagram

Answer 24

[?] Shows how colour can be constructed with three variables on a two-dimensional graph.

Question 25

CIE

Answer 25

[?]

Question 26

Collector

Answer 26

[?]

Question 27

Collimator

Answer 27

[?]

Question 28

Color Map

Answer 28

A range of colours that can be returned depending on a variable.

Question 29

Compensation table

Answer 29

[?]

Question 30

Concave object

Answer 30

A line can be drawn between any two points in the object and it will not intersect the object anywhere inside.

Question 31

Convex combination

Answer 31

[?]

Question 32

Convex object

Answer 32

There exists a line through the object where it intersects with the object at more than just at the two ends of the line.

Question 33

Crossbar Switch

Answer 33

NO

Question 34

Cross Product

Answer 34

Only for two vectors in 3D space. For A, B, angle theta, and normal N: A x B = ||A|| ||B|| cos( θ ) N

Question 35

DAC

Answer 35

[?]

Question 36

DDA

Answer 36

[?]

Question 37

Decay

Answer 37

[?]

Question 38

Deflection Coil

Answer 38

[?]

Question 39

Delta Gun

Answer 39

[?]

Question 40

Diffuse reflection

Answer 40

A term in the local lighting model approximation. Diffuse is the random lighting (i.e. is not influenced by the angle of the light hitting the surface)

Question 41

Distributed Ray Tracing

Answer 41

Kijaya's paper. A way of generating an image by approximating lighting with rays sent from the view (rather than from the lights) in parallel and recursively.

Question 42

Dithering

Answer 42

[?] The approximation of how light decreases in intensity over distance

Question 43

DMA

Answer 43

[?]

Question 44

DMA

Answer 44

[?]

Question 45

Doping

Answer 45

Lance Armstrong

Question 46

Dot Product

Answer 46

Sum of element-wise products of two vectors. Also geometrically, the angle between two vectors. A . B = sum_i ( a_i * b_i ) A . B = ||A|| ||B|| cos θ

Question 47

Draggin

Answer 47

[?]

Question 48

DVST

Answer 48

[?]

Question 49

ECL

Answer 49

[?]

Question 50

Electromagnetic

Answer 50

Electricity and magnetism

Question 51

Form Factor

Answer 51

[?] A relationship between a surface patch | Related: Radiosity

Question 52

Fragment Shader

Answer 52

OpenGL shader that colours between vertices by interpolating materials from vertex colours.

Question 53

Frame

Answer 53

One image in an animation

Question 54

Frame Buffer

Answer 54

[?]

Question 55

Gamma Correction

Answer 55

A way of causing changes in light intensities to appear more realistic to human eye. I_ij = I_ij * (v_j / v_max) ^ Gamma

Question 56

GKS

Answer 56

?

Question 57

Gouraud Shading

Answer 57

A way of interprelating shading from vertices and their normals, but not phong shading...

Question 58

Gravity Field

Answer 58

Related: Physics

Question 59

Hertz

Answer 59

Rate of sampling

Question 60

Homogenous coordinates

Answer 60

?

Question 61

Opponent colours

Answer 61

A theory of colour where blue/yellow, red/green, and black/white are opposing colours detected by rods in our eyes and every colour must be along those bands.

Question 62

Phong Shading

Answer 62

Interpolating normals between verticles of surrounding normals to create smoother shading along edges.

Question 63

Phosphor

Answer 63

Chemical. Used to coat early displays because it would light up when hit by a laser (CRT) Related: Phosphorescence, CRT

Question 64

Phosphorescence

Answer 64

The chemical reaction leading to light emitted from phosphor Related: CRT

Question 65

Pixel

Answer 65

Picture element. Represents a single colour in an image.

Question 66

Plasma Panel

Answer 66

A type of display that ...

Question 67

Radiosity

Answer 67

Method for approximating lighting. Divide surfaces into patches and calculate the light hitting each patch and the bounces of light from all other patches. Add up light. Very computationally intense when models get detailed/surfaces are not flat.

Question 68

RGB

Answer 68

Red, Green, Blue

Question 69

Shader

Answer 69

An OpenGL construct for representing light and material interactions

Question 70

Specular Reflection

Answer 70

Changes with angle of the light