I edited while you were typing, Iliah, please see above. I used the quote marks because we were unable to find that exact phrase in the article; I was not intending to discuss it's meaning.
June 16, 2023
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In proportion to the conductance. Or inversely proportional to the resistance. But you know that.
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Indeed, silly mistake.
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no comment
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let me get this right ,you like using blinkies but they are not helpful 😏 other wise i like your overall post.
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its been 40years since i studied/played electronics. it just works 😁 and i calibrate the meter without any mathematics ,pretty much the same as my photography.
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Current implementations use the JPEG EVF image, not much use for determining clipping with all the processing applied. I want blinkies based on the raw data.
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have you actually tested your histogram accuracy ? because my sony a74 coudnt be any more accurate.
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"I determined it using the exposure triangle."
Gold 😁
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It's a histogram of a JPEG, and it's accurately histograms that JPEG :))
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Scenes don't have brightness, they have a range of brightnesses. Otherwise they are as emotionally engaging as uniformly lit grey cards are.
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Blinkies based on the raw data would be pretty cool, Glenn.
That would be interesting to do, Donald, but sadly I don't know how to test the accuracy of my histogram.
As you likely know, a histogram is a set of vertical columns arranged sid-by-side, each column width (or "bin") representing a range of values and each column height representing a count of how many image pixel values are within that range. The problem with my histogram is that it is quite small on the LCD and the bin size/width is not given in the manual and, worse, the column heights are auto-ranged to fit the histogram rectangle height and there is no scale shown on the Y-axis of the histogram diagram. So, for me, it is impossible to check accuracy because I don't know the bin width and I don't know the count for any particular bin.
Would you share how you tested the accuracy of the Sony a74 histogram?
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[deleted]
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theres a thread i started with 1000 posts somewhere on this forum. are raw histograms important or something like that. good luck finding it.
found it
dprevived.com/t/raw-histogram-and-why-does-it-matter/1848/ -
To prove a fact, one post is usually enough.
A histogram of a JPEG is an accurate (within histogram window width and height constraints) histogram of a JPEG. Ta-daaaa! -
I don't know exactly what the Elephant-in-the-room uses but one standard says "When encoding Y’CBCR video, BT.709 creates gamma-encoded luma (Y’) using matrix coefficients 0.2126, 0.7152, and 0.0722"
en.wikipedia.org/wiki/Rec._709
So Luma would be 100% when 0.2126R+ 0.7152G+0.0722B=1.
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Thanks - I see that you use RawDigger, this is your posted image:
Because the histogram can be scaled at least you can determine counts and bin sizes.
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all the posted raw file links wont work as i have deleted the images they were clogging up mu one drive.
any you will get the idea or maybe not its such a merry go round thread with a lot of off topic comments.
