JPEG Viewer : Help : Tutorial : Part 2 - Adjust Image Color

Brightness / Contrast

  1. [Edit] -> [Adjust] -> [Brightness / Contrast]
  2. Select RGB channel
    • All or part of channels can be edited
  3. Adjust Brightness
    • Darker or brighter the image
  4. Adjust Contrast
    • Increase or decrease the contrast
  5. Adjust Level
    • The reference value for contrast

Color Balance

  1. [Edit] -> [Adjust] -> [Color Balance]
  2. Adjust RGB channel offset
    • Increase R the image become red
    • Decrease R the image become cyan
    • Increase G the image become green
    • Decrease G the image become magenta
    • Increase B the image become blue
    • Decrease B the image become yellow
  

CMYK

  1. [Edit] -> [Adjust] -> [CMYK]
  2. Adjust CMYK color amount
    • C adjust the amount of cyan
    • M adjust the amount of magenta
    • Y adjust the amount of yellow
    • Increase K the image become darker
    • Decrease K the image become brighter
  

Hue / Saturation / Lightness

Swap color

  1. [Edit] -> [Adjust] -> [Hue / Saturation / Lightness]
  2. Adjust hue
    • Adjust the angle offset of hue
  3. Adjust saturation
    • Adjust the saturation offset
  4. Adjust lightness
    • Adjust the lightness offset
  

Colorize Image

  1. [Edit] -> [Adjust] -> [Hue / Saturation / Lightness]
  2. Enable colorize
  3. Set hue
    • Set the angle of hue
  4. Adjust saturation
    • Adjust the saturation amount
  5. Adjust lightness
    • Adjust the lightness
  
0 30 60 90
120 150 180 210
240 270 300 330

Level

  1. [Edit] -> [Adjust] -> [Level]
  2. Select curve mode
    • Line, Polynomial
  3. Add/Remove control points
    • 3 - 16 points
  4. Adjust control point position
    • Input/Ouput
 

Saturation

  1. [Edit] -> [Adjust] -> [Saturation]
  2. Select color space
    • BT601, BT709, JPEG, HSL
  3. Adjust saturation
    • Increase or decrease saturation