The other possibility is that you have not selected an area. Selecting a point will not work -- you need to select a small rectangle of pixels to average. Otherwise, the calibration would not be reliable due to noise at each pixel.
Don't forget to re-save your image once you have calibrated. You should also assign the VIEW parameters if it is a fisheye view, as this is the source of a lot of errors with evalglare. Cheers, -Greg > From: "Guglielmetti, Robert" <[email protected]> > Subject: Re: [HDRI] input luminance (cd/m2) into HDR image via Photosphere > Date: April 21, 2016 8:36:41 AM PDT > To: High Dynamic Range Imaging <[email protected]> > > If the "apply" button is greyed out, then I think the image you have loaded > is not an HDR image - or Photosphere doesn't think it is. How did you create > the image you're trying to calibrate? > > - Rob > > On 4/21/16, 8:54 AM, "Andrews, Ben" > <[email protected]<mailto:[email protected]>> > wrote: > > hello all, > > I am experimenting with high dynamic range imaging and glare analysis. I am > attempting to input a luminance value (cd/m2) into an HDR image with > Photosphere software. The ultimate goal is to save a .hdr file to bring into > Evalgare. > > I've used an luminance meter to record the cd/m2 in the room and now I'm > trying to pick that same spot on the HDR image and calibrate the luminance > within the Apply Menu of Photophere. Trouble is the Apply button is grayed > out. > > Has anyone experienced a similar problem? Any advice would be much > appreciated. > > Thank you. Ben _______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri
