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Exposure Correction With Histogram

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  • Exposure Correction With Histogram

    One of my photos has been rejected for being UNDEREXPOSED and the screener's comment was SEE THE HISTOGRAM. But I don't know how to understand the Histogram to know whether the photo is overexposed or underexposed.

    Please Help Me With That

  • #2
    I see that you are using the latest version of Photoshop.

    Open the image in Photoshop and go to "Image"...."Adjustments".
    Select "Levels". This will open the histogram window. The arrows at the bottom of the graph can be moved left and right. The leftmost arrow controls dark tones, the middle controls midtones and the right arrow controls light tones. You will see a gap on the right base of the graph which shows the missing light tones. You need to drag the right arrow to the left until it touches the start of the graph.


    To be even more accurate in your adjustments you really need to use the Luminosity Histogram as a reference. To find this go to "Window"...."Histogram". Another histogram window will show. In the "Channel" option use the drop menu and select "Luminosity". This can sometimes show a graph very different to the Levels one but it is the one you need to set your adjustments to to achieve the best light levels and contrast.

    What you need to do is to adjust the Levels histogram but watch the effect on the Luminosity histogram. Close any gaps on the left and right baseline by moving the Levels Historam arrows and watching the effect on the Luminosity Histogram. The Midtones middle arrow can be use to brighten or darken the midtones.

    Here is a link to an excellent Histogram tutorial...
    If it 'ain't broken........ Don't try to mend it !


    • #3
      Updated link

      Originally posted by brianw999 View Post
      Here is a link to an excellent Histogram tutorial...
      Thanks Brian for the posting the link to histogram tutorial. Just tried and found that the link is broken. Here is the updated one.


      • #4
        Thnx Sid n Brian. Yaap The Link Brian provided was broken thats why I went to focusonflight n already checked the forum n got the thread