Camera RAW - Unwrap RAW to HDR for mirrored ball

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Can the latest version of RAW unwrap a mirror ball and remove artifacts out of the image following by, which I believe can be done turn the RAW file into, not a pseudo HDR image, rather a true HDR image ? Some of the tools from the past that did this, which were free have gone defunct.
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Christopher Rotter

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Posted 3 years ago

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Steve Sprengel, Champion

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What you are talking about: "unwrap a mirror ball", "pseudo HDR", "true HDR"?
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Christopher Rotter

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Pseudo HDR whereas you turn a JPEG into a HDR compared to using exposures making a true HDR.
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Chris Cox

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That's not "pseudo" - that's just not HDR.
HDR is High Dynamic Range - which needs special cameras or multiple exposures.
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Christopher Rotter

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That is what I meant by Pseudo when you take a JPEG and try to make it a HDR as you can do in Photoshop.
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Steve Sprengel, Champion

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I think you mean storing LDR data (the JPG) into an HDR-capable format like a 32-bit TIF where you can't really tell that it's LDR data, anymore.

Anyway ACR 9 will combine exposures to make "true HDR" data that is stored in a floating point DNG.
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Christopher Rotter

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That is what I wanted to know, except I didn't mention the use of LDR for JPEG in my question.

What is the best EV for DNG when creating HDR from DNG ?
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Steve Sprengel, Champion

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JPGs can only contain LDR data so you didn't have to specify this.

There is no "best EV" for the original exposures. It depends on the brightness range of the scene. Generally you want an exposure that is dark enough to show detail in the brightest area (like the clouds) and another exposure that is bright enough to show detail in the darkest shadows, then one or more in between that give detail to the midtone areas.

The complication is that the more photos you take and combine the more chance there'll be some mismatch between them due to subject movement like people walking or plants blowing in the breeze or even your camera position changing slightly if you're shooting handheld.

And we're not creating HDR from DNG, we're creating HDR from raw files and the result is stored in the DNG. What makes this DNG different than normal DNGs is that the pixel values are floating point (decimal number) rather than integers (whole numbers) like normal raw files and DNGs and JPGs have.
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Steve Sprengel, Champion

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ACR 9 can create an HDR linearized-DNG from multiple raw files at different exposures that retains the raw capabilities of absolute white-balance and camera profiles. This HDR-DNG has 16-bit floating point numbers for the RGB values at each pixel position.
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Christopher Rotter

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A DNG/RAW file can contain different exposures, why do you need multiple RAW files ?
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Christopher Rotter

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How many images do you personally take ?
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Chris Cox

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It depends on the scene. Sometimes 3 (with a 1-2 stop difference) is good enough, and sometimes you need 25 to cover the entire range.
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Christopher Rotter

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I found my camera can merge the exposures automatically then output to RAW, although that depends whether I use the standard program or another program.
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Steve Sprengel, Champion

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Multiple-exposures is different than HDR exposures. My 7D Mark II will do both, and outputs a raw in multi-exposure mode but a JPG in HDR mode.
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Christopher Rotter

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Some camera / smart phones are limited to JPEG in HDR, all depends on the make and model.