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11/19/2005 06:27:39 PM · #1 |
Hello,
I know "what" the histogram is but how can I use it "in cam" and in post processing to help my photos?
Thanks for your help!
Kenskid |
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11/19/2005 06:35:17 PM · #2 |
First and foemost, while shooting, turn on the histogram display during review, and make sure you refer to it. Look specifically for "scrunchig up" of the histogram at the right, as that indicates overexposure, or at the left (that indicates lost detail in the darkest areas). Also recognize that what you see in the on-camera histogram is the luminosity histogram. Even if it shows that nothing is blown, you may have one or even two individual channels that are. When shooting highly saturated subjects, remember this and bring down exposure a bit (or shoot RAW, and bring it back in range in conversion).
In post-processing, just watch that none of your processes start to kick the histogram out the ends of the window, unless you want the effect. Some photos demand a lot of pure black or white, for instance and so you need to know when to break the rules. In your photo editor, turn on the color histogram display to show each individual channel, rather than luminosity. That will help you to post-process and keep detail in high-saturaton areas.
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11/19/2005 06:51:28 PM · #3 |
Finally ...histograms are clear. I'll work with them from now on!
Thanks...
Anyone else have a lesson they want to share?
KenSkid
Originally posted by kirbic:
First and foemost, while shooting, turn on the histogram display during review, and make sure you refer to it. Look specifically for "scrunchig up" of the histogram at the right, as that indicates overexposure, or at the left (that indicates lost detail in the darkest areas). Also recognize that what you see in the on-camera histogram is the luminosity histogram. Even if it shows that nothing is blown, you may have one or even two individual channels that are. When shooting highly saturated subjects, remember this and bring down exposure a bit (or shoot RAW, and bring it back in range in conversion).
In post-processing, just watch that none of your processes start to kick the histogram out the ends of the window, unless you want the effect. Some photos demand a lot of pure black or white, for instance and so you need to know when to break the rules. In your photo editor, turn on the color histogram display to show each individual channel, rather than luminosity. That will help you to post-process and keep detail in high-saturaton areas. |
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11/19/2005 07:06:36 PM · #4 |
Couple of things I find useful in PS;
- Create a new 'Threshold' adjustment layer, and move that slider up and down to see where all the high/low histogram tones are in your image (this is useful for identifying black and white points for the curves layer)
- Similar trick when using the 'levels' dialog. Hold down the ALT key while moving the arrows at each end, and you'll see how the image tones relate to the histogram
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11/23/2005 11:03:44 PM · #5 |
His Toe Gram?
I thought it was a picture of a toe???
Just kidding.
What kirbic said. Remember, you can't rely on the LCD's brightness of an image to see if a shot is exposed properly, you use your histogram for that.
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11/24/2005 12:05:52 AM · #6 |
What does clipping mean in relation to a histogram?
Thanks. |
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11/24/2005 01:11:52 AM · #7 |
Originally posted by Olyuzi:
What does clipping mean in relation to a histogram?
Thanks. |
Means the tones moved outside the useable range, right off the histogram basically. They got "clipped off".
Robt. |
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