Luminous Landscape Forum
Raw & Post Processing, Printing => Digital Image Processing => Topic started by: rabanito on May 08, 2019, 02:25:22 pm
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I gather that the histograms in my camera are "valid" for the .jpg format,
1. My camera permits to adjust among other parameters, contrast. Then the histograms change for the same image.
I assume that this adjustment is only valid for the .jpg format and since I take pictures in RAW, there should be no real change.
Am I right?
2.Now when the RAW file is imported in LR, I have a similar histogram.
I assume that this histogram is the product of the interpretation of the raw data by LR
If I export from LR to PS the histogram in PS is similar but not quite the same.
This is a little confusing to me.
I can live with that but I wonder if I'm missing some tool or "weapon" that could make my life still easier.
Should I ignore this data or take it with a grain of salt? Or is it VERY important?
Thanks for any hints :)
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Everything you thought you wanted to know about Histograms
Another exhaustive 40 minute video examining:
What are histograms. In Photoshop, ACR, Lightroom.
Histograms: clipping color and tones, color spaces and color gamut.
Histogram and Photoshop’s Level’s command.
Histograms don’t tell us our images are good (examples).
Misconceptions about histograms. How they lie.
Histograms and Expose To The Right (ETTR).
Are histograms useful and if so, how?
Low rez (YouTube): http://www.youtube.com/watch?v=EjPsP4HhHhE (http://www.youtube.com/watch?v=EjPsP4HhHhE)
High rez: http://digitaldog.net/files/Histogram_Video.mov (http://digitaldog.net/files/Histogram_Video.mov)
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To add some confusion :D I'll show you a genuine RAW histogram (yes, they exist, anything that is represented by a series of numbers has a histogram. Simply your camera and RAW developer makers refuse to provide it):
(https://assets.change.org/photos/5/ic/ze/EViCZEQriNMtQfr-800x450-noPad.jpg?1524572650)
Such a histogram would be very useful to have in our cameras since it provides accurate exposure information in a very intuitive way (each column in this case represents a stop).
https://www.change.org/p/camera-manufacturers-include-raw-histograms-on-digital-cameras-8ad3dda3-5b22-4438-83e2-0e18689db4ab?use_react=false
Regards
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Everything you thought you wanted to know about Histograms
Thank you Andrew. I expect another interesting tutorial :)
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Such a histogram would be very useful to have in our cameras since it provides accurate exposure information in a very intuitive way (each column in this case represents a stop).
Good idea, Guillermo
Yo tambien firmé
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Thank you Andrew. I expect another interesting tutorial :)
Yes it is
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Some articles to consider.
JPEG histogram:
https://www.fastrawviewer.com/blog/in-camera-histogram-doesn%27t-represent-exposure
Raw and JPEG histogram:
https://www.fastrawviewer.com/blog/exposure-bracketing
http://www.guillermoluijk.com/article/histogram/index.htm
Raw histogram, as displayed in Raw Digger and similar applications:
https://www.rawdigger.com/howtouse/rawdigger-histograms-what-is-the-raw-histogram
https://www.rawdigger.com/howtouse/rawdigger-histograms-display-modes
https://www.rawdigger.com/howtouse/rawdigger-histograms-overexposure-shapes
kirk
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Some articles to consider.
Thanks Kirk.
I started to read :)