Glossary

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This glossary holds definitions important for the GIMP development. These include functional definitions i.e. from computer graphics and color theory, terms from BABL and GEGL etc.


Table of Contents

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

References

A

  • A (uppercase) -
    • The alpha channel in a color model, for instance in RGBA.
    • In babl the alpha value in a color model. If combined with alpha-premultiplied color channels: the alpha value each color channel R, G, B was multiplied with to achieve Ra, Ga, Ba. Needed to get from RaGaBa back to RGB. The same applies to R'aG'aB'aA, YaA, Y'aA.
  • a (lowercase) -
    • The axis in the CIELAB color space which denotes the magenta-green component of the image. One end of the axis is green and the other end magenta.
    • In babl: marks a color channel to be premultiplied with alpha, for instance RaGaBa is premultiplied alpha RGB
  • Alpha - opacity. An alpha value of 0 means 'transparent', an alpha value of 100 means 'fully opaque', values in between mean 'partly opaque'.

B

  • babl - a dynamic, any to any, pixel format translation library. (Website)

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

References