What is Histogram?

Discussion in 'Photography Beginners' Forum' started by boclcown, Dec 30, 2006.

  1. boclcown

    boclcown TPF Noob!

    Joined:
    Aug 16, 2006
    Messages:
    74
    Likes Received:
    0
    Could someone explain to me what it does and how I can use it. After I take a picture, it is displayed, but I forget everything I read about them...heh.
     
  2. The_Traveler

    The_Traveler Completely Counter-dependent Supporting Member

    Joined:
    Dec 11, 2006
    Messages:
    18,092
    Likes Received:
    7,449
    Location:
    Mid-Atlantic US
    Can others edit my Photos:
    Photos NOT OK to edit
  3. RacePhoto

    RacePhoto TPF Noob!

    Joined:
    Dec 29, 2006
    Messages:
    562
    Likes Received:
    5
    Location:
    Wisconsin
    Can others edit my Photos:
    Photos NOT OK to edit
  4. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

    Joined:
    Aug 25, 2003
    Messages:
    7,021
    Likes Received:
    34
    Location:
    Lawrence, KS
    Can others edit my Photos:
    Photos NOT OK to edit
    A histogram is a graphic representation of the amount of specific tones in a photo. The left end is solid black, and the right end is solid white. Middle gray is in the middle (imagine that). A dark scene will have more tones to the left. A bright scene will have more tones to the right. If your histogram shows that the tonal scale goes off the histogram to the left the photo is probably underexposed (although maybe you wanted it that way?). If the scale goes off the histogram to the right it's probably overexposed. Many histograms are luminosity histograms, meaning they average the tones from the 3 channels (red, green, and blue). A luminosity histogram is not as accurate as a histogram that will show you the tones from each channel individually.
     

Share This Page