Histogram based on RAW data? Also Blinkies and Zebras? - Feature Requests - CHDK Forum
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Histogram based on RAW data? Also Blinkies and Zebras?

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Offline l_d_allan

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Histogram based on RAW data? Also Blinkies and Zebras?
« on: 11 / March / 2014, 07:59:41 »
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Sorry if this has been asked before, or if already [Done].

Would it be possible to have an option for the histogram to reflect RAW values rather than JPEG values?

This was implemented in MagicLantern last year, and makes the histogram more accurate.

If possible, could "Blinkies" and "Zebras" also reflect RAW rather than Jpeg?

I suppose this might change based on whether the image format for .jpg or .cr2?
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Offline reyalp

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Re: Histogram based on RAW data? Also Blinkies and Zebras?
« Reply #1 on: 11 / March / 2014, 16:04:17 »
Quote from: l_d_allan on 11 / March / 2014, 07:59:41
Would it be possible to have an option for the histogram to reflect RAW values rather than JPEG values?
This would only be possible after a shot is taken.

Internally, the shot_histogram code allows us to take a histogram of the raw data, but it is only available to script.

Quote
If possible, could "Blinkies" and "Zebras" also reflect RAW rather than Jpeg?
As above.
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Offline l_d_allan

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Re: Histogram based on RAW data? Also Blinkies and Zebras?
« Reply #2 on: 12 / March / 2014, 00:51:37 »
Quote from: reyalp on 11 / March / 2014, 16:04:17
This would only be possible after a shot is taken.

I think that would be very advantageous, if feasible.

My impression is that the ML implementation of "Raw Histogram" is after-the-shot Review of the immediately preceding image.

At one point, it seemed like there was a Preview Histogram with ML, but that no longer seems to be the case, and that may have been based on the JPEG engine rather than RAW.
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