hdrgen question, systematic error?

Folks,

I just used the Linux version of the hdrgen program, and there appears to be a systematic error somwhere.

My first attempts were handheld, and alignment always failed. My attempt today was using a tripod in my living room, and the alignment error is very regular:

http://mark.technolope.org/transfer/dscn6880pfilt.jpg

This was done with:
hdrgen dscn68??.jpg -o test.pic -r cam.rsp
pfilt -1 -x /2 -y /2 test.pic | ra_ppm | cjpeg -q 90 > dscn6880pfilt.jpg

uname -a gives:
Linux localhost.localdomain 2.4.22-1.2115.nptl #1 Wed Oct 29 15:42:51 EST 2003 i686 i686 i386 GNU/Linux

Is there anything I can do about this?

Mark
[email protected]

Hi Mark,

I had something similar occur, however the scene was very different. In my case there was a cloud moving past a building. With automatic alignment turned on (default behavior) I got a result similar to yours. It seemed like the program was tracking on the brightest "source" in the set of exposures. I wonder during the time that you took your exposures was there a big change in the daylight coming into the space? What happens if you turn alignment off (-a included in the command line)?

Or alternatively, are you sure that you are passing only the exposures you want to hdrgen? I have done this in the past where I will take a set of exposures and part way through shooting the set I realize that I screwed something up so I will start over and in the process may change the camera position. However I forget to delete the previous set from the folder, so they get passed along to hdrgen as well.

-Jack

Mark Stock wrote:

ยทยทยท

Folks,

I just used the Linux version of the hdrgen program, and there appears to be a systematic error somwhere.

My first attempts were handheld, and alignment always failed. My attempt today was using a tripod in my living room, and the alignment error is very regular:

http://mark.technolope.org/transfer/dscn6880pfilt.jpg

This was done with:
hdrgen dscn68??.jpg -o test.pic -r cam.rsp
pfilt -1 -x /2 -y /2 test.pic | ra_ppm | cjpeg -q 90 > dscn6880pfilt.jpg

uname -a gives:
Linux localhost.localdomain 2.4.22-1.2115.nptl #1 Wed Oct 29 15:42:51 EST 2003 i686 i686 i386 GNU/Linux

Is there anything I can do about this?

Mark
[email protected]

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