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Old Jan 30, 2011, 4:33 PM   #1
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I've made a start on enhancing AutoHDR to handle bracketed shots. It's looking promising so far so long as the shots are perfectly aligned to start with. auto-alignment will have to be my next task. There's not a version ready for release yet but here's a sample using 6 exposures, spaced 1ev apart. I just drag them into AutoHDR and it automatically works out the relative exposure without using the EXIF so there's never anything manual to enter.

C&C welcome.

First the exposures:


Next the automatically combined shot which I guess is a 'proper' HDR shot:


And then you process it as before (here on the 'Normal' preset):
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Old Jan 31, 2011, 12:47 AM   #2
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judging by the results above i would say the second example is the best , looking under your desk and to the grill on the purifier the detail is visible.

cant wait to try your program martin a major step and about bloody time too(just dont rush it)
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Old Jan 31, 2011, 2:12 AM   #3
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Thanks I wish I'd taken a few more brackets to really get the detail under the desk but it's a bit dark even in the brightest one. The FZ38 doesn't have more exposure compensation than that but because I've written the code to just work it out from the image, not the exif data, I can just use longer and shorter shutter speeds to get a wider range and it will work just as well.

I *think* the alignment might be quite tricky although I think most programs just look at horizontal and vertical movement so I'll start with that. Can add in rotation and perspective distortion if they're really an issue.
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Old Jan 31, 2011, 9:28 AM   #4
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wow the results are really natural looking. good job Martin !
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Old Feb 2, 2011, 6:55 AM   #5
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Quote:
Originally Posted by Acapulco View Post
wow the results are really natural looking. good job Martin !
Thanks - I'm surprised just how well it's turning out so far. Here's another one - 16 exposures from 8s to 1/2000s, all ISO80

The middle exposure:


Merged and tone-mapped 14-exposure shot
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Old Feb 2, 2011, 7:45 AM   #6
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And one in the garden. I'm finding I get better results if I use a wide range of varied shutter speeds rather than the built-in bracketing and exposure compensations.

Middle exposure:


merged and tonemapped from 11 exposures:
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Old Feb 2, 2011, 1:32 PM   #7
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Quote:
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Merged and tone-mapped 14-exposure shot
This is really looking very good, Martin! Very interesting, indeed! very subtle tones here. Be proud, man!

Best regards,
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Old Feb 3, 2011, 2:00 AM   #8
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Thanks Walter!

I've just about got the first attempt at auto-alignment working so there should be a release out soon. It handles horizontal and vertical misalignment pretty well but there's a bit more to do to handle rotation etc.
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Old Feb 3, 2011, 2:52 AM   #9
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Another teaser - a subtle sunset with 7-exposures taken in my unlit conservatory. The bluer sky is because the roof has blue-tinted glass in case you were wondering...

Middle exposure:


7-shot HDR combined and 'Very sharp' preset:
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