few tips from my sessions @sae.edu

1. COLOR CORRECTION and more…
>Adobe Plugins:
●Auto color: it neutralizes the midtones while limiting the range of the black&white values.
●Fast color corrector: let us input the values of the black hey and white colors.
>Colorspaces (or Gamut: color ranges)
Adobe RGB 1998 (gamut 30% larger than sRGB - more colors but not all screens can display all
those Adobe98 colors - PS: sRGB images will look dull on a Adobe RGB profile – Adobe RGB 98 is
used to print photographs, books,...etc)
sRGB by Microsoft and HP (standard for all screens)
ProPhoto RGB wide gamut needs a wide gamut display
RGBA red green blue alpha
LAB the ensemble of colors that the average eye sees
CMYK is the standard for print
DCI-P3 (created by 7 of the largest studios: 20th century, Warner bros, Sony, Waltz Disney,
Paramount, Universal, Metro-Goldwyn-Mayer - needs a wide gamut display like the Adobe
RGB98)
Rec.2020 standard for Ultra High Definition Tv (UHDTV) (4k & 8k)
HSL = HSV hue saturation lightness/value

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HSB hue saturation brightness & HSI hue saturation intensity
YUV=YCbCr (Y is luma and UV are the color (chroma) while Cb is blue minus luma Cr is red
minus luma) more realistic color than sRGB (PAL and SECAM systems
>The 8bit Limits:
RGB values for each color range from 0 to255
In RGBA the A is 0 (transparent) or 1 (opaque)
YUV values: Y ranges from 0 to 1, u and v are -0.5 to 0.5
We can convert RGB to YUV with math equations:
R=Y+1.4(U-128)
G=Y-0.3 (V-128)-0.7 (U-128)
B=Y+(V-128)
>Definition:
Hue: the color character
Brightness: the attribute of a visual sensation according to which area emits more or less light.
Lightness (value): the brightness relative to the brightness of a similarly illuminated white.
Saturation: the amount of white and black in a color, or how much the color is pure.
Temperature: symmetrical balance between red and blue (R up, B down)

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Tint: symmetrical balance between RB and G (RB up, G down)
LUT: lookup tables: a new process in presenting colors via different gamuts (used to color
correct shots or use them creatively).
>Blending Layers:
Multiply: would color what is white (Makes White transparent)
Screen: would color what is black. (Makes Black transparent)
Overlay: would color what is white and both layers luminance (amazing for greyscale on top of
colors)
Broadcast Definition:
>Old Color encoding Systems for broadcast
PAL: phase alternating line for analogue tv (576i, 25 fps)
NTSC: national television system committee
SECAM: séquentiel couleur à mémoire
>New color encoding systems for broadcast
DVB: digital video broadcasting
ISDB: integrated services digital broadcasting
DTMB: digital terrestrial multimedia broadcast

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