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I captured a scene with a crummy IP camera at -2, 0, +2 EV intending to join them into an HDR image: Image Gallery

When I create a new HDR image with Luminance HDR 2.5.1., the exposure values are somehow read as -1.99, +0.00, +0.32, which is unexpected as the EXIF data says -2, 0, +2. I adjust these parameters to their expected values and then use Profile 1 to create the image.

Here's what I get:

Bad sky

The sky looks terrible, with solid blotches of gray that are much darker than the source image. It seems to be this way regardless off which tone mapping operator I choose. I understand if the sky is blown-out in the resulting image, but how can I make the appearance less dramatic?

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Perhaps your camera is unable do capture at +2 EV in the given circumstances and the true exposure is +0.32, as reported by Luminance HDR. Forcing the incorrect EV creates a contradiction which gives you the absurd sky color.

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... but how can I make the appearance less dramatic?

Don't blow out the sky. There's no detail there. Every pixel is the same exact value. No matter what you do in post the parts that are blown out will all be uniform in color and brightness.

  • Sure, but why does it choose this gray, instead of something closer to the input? There's a huge, unexpected increase in contrast between the sky and the trees. – Ryan Govostes Apr 24 '18 at 13:26

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