Hi Peony, I guess no one ever responded to this... I can really only repeat my response from August, which is that getting calibrated output from phone cameras is not possible at this stage, and may never be. Their application is too different, and repeatability is not one of the design requirements for these modules. They alter sensitivity, color response, and probably tone response without making any record of the original data. I really think it is a waste of your time.
Best, -Greg > From: "Peony Au" <[email protected]> > Date: November 27, 2012 11:13:11 PM PST > > Hi everyone, > > After much development on my thesis, I have a few queries I am hoping some of > you will be able to help me out on. > > First of, my supervisor pointed out an application on the iPhone called > iPhotoLux which maps the luminance measurement of an HDR image taken by the > iPhone camera. So I am hoping what I am trying to produce in my thesis does > work. > > Secondly, I have been using a Nikon DSLR camera to create HDR images in the > lighting laboratory using a scale model, so that my skills in creating a > accurate HDR image. I have also used both luminance and illuminance meters to > ensure the photos are accurate. > > Therefore, after experimenting in the lighting laboratory, I got my > Smartphone camera back out and using a HDR Camera application available in > the Android market. I put both cameras side by side and took images of the > same scene on a tripod. However, I am still receiving the same error message > as before, then I found out that the HDR Camera application does not write > the EXIF data required to create a camera response curve. Therefore, just to > try the images produced by the Smartphone out, I coped the EXIF data from the > DSLR camera and inserted into the images produced by the Smartphone camera > ensuring that all the exposure value information are the same. I then try and > fuse these Smartphone camera produced images together, but the same error > message reappears. > > Therefore, I was just wondering if anyone knows why the camera response curve > cannot be created even with the comparison done between the DSLR camera and > the Smartphone camera. > > Thank you for all your help. > > Kind regards, > Peony _______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri
