Thread: HDR Pictures with the N900?
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zimon is offline zimon
2010-04-16 , 08:41
Posts: 1,341 | Thanked: 708 times | Joined on Feb 2010
#118
Originally Posted by eol View Post

TL;DR: I wrote a set of HDR scripts which utilises the superior v4l2-ctl library:

P.S. The tar.gzip package also contains hdr-enfuse.sh, which can be used in conjunction with Easy Debian to automate the processing of the raw image files.
There is a software called Qtpfsgui, which could semi-automatically create HDR-images from raw-images.
It supports only JPEG and RAW formats though currently.
I asked the author, if PNG support is possible.
Right now I just tried to convert the PNG files to JPEG with Gimp.

However, for Qtpfsgui to do most of the work automatically, it needs EXIF data in the image file. I believe, there can be EXIF data both in PNG and JPEG-files.
WARNING:
Qtpfsgui was not able to find the relevant EXIF tags for the following images:
raw-08267.jpg
raw-16550.jpg
raw-33138.jpg

You can still proceed creating an Hdr. To do so you have to insert manually the EV (exposure values) or stop difference values.

If you want Qtfsgui to do this automatically, you have to load images that have at least the following exif data:
Shutter Speed (seconds)
Aperture (f-number)
So if you would like to improve your scripts, having the correct EXIF data in the raw images (either JPEG or PNG) would be great.