Peony,
It is also possible that you could not create the camera response curve based
on the scene you have taken. If the scene does not have large and smooth
gradients, Photosphere cannot create a camera response curve. This could happen
with any camera. A different scene that has the gradients would provide a
camera response curve. However, the issues Greg pointed out are major problems
with phone cameras. Even if you are able to generate the camera response curve
with another scene, due to the inconsistencies Greg pointed out, it is unlikely
to get accurate, reliable HDR images.
Mehlika
On Fri, 24 Aug 2012, Peony Au wrote:
Hi Greg & Rob,
Thank you for your quick responses. I've taken the photos on a tripod under
an artificial sky to minimise errors, but from what you are saying there's
nothing I can do to create a camera response curve.
Thank you for all your help.
Kind regards,
Peony
-----Original Message----- From: Gregory J. Ward
Sent: Friday, August 24, 2012 6:11 AM
To: High Dynamic Range Imaging
Subject: Re: [HDRI] Photosphere "Cannot solve for response function"
Well, Photosphere is supposed to handle some camera motion, but if you're
shooting from your bicycle....
From: Rob Guglielmetti <[email protected]>
Date: August 23, 2012 10:34:49 AM PDT
Haha Greg, isn't another likely problem camera movement between exposures?
- Rob
On Aug 23, 2012, at 11:25 AM, Gregory J. Ward wrote:
Hi Peony,
The likely problem is that your smart phone is too smart! Most phone
cameras play tricks with the response curve, white balance, and other
capture characteristics that undermine any attempt to get a consistent HDR
result. No phone cameras I know allow you a true "manual mode" that
disables such behavior, so they aren't really suited to HDR capture.
Best,
-Greg
From: "Peony Au" <[email protected]>
Date: August 23, 2012 1:50:24 AM PDT
Dear all,
I am trying to create HDRIs using an Android Smartphone. I have taken six
photos ranging from –3 to +3 and have tried to fuse these in Photosphere,
however I am getting a “cannot solve for response function” message. Does
anyone know how I can create a response curve or what I am missing to
create the response curve? I can create a HDR image using the generic
response curve, but for my thesis I would need all the HDRIs to be as
accurate as possible.
Thank you for your time.
Kind regards,
Peony
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri
_______________________________________________
HDRI mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/hdri
