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
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
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
Greg,
Thank you for your help. The problem was the creation of the small rectangle. I was clicking on the image where the luminance meter was focused, but I didn't realize I need to draw a rectangle or box.
Thanks again,
Ben
···
-----Original Message-----
From: Gregory J. Ward [mailto:[email protected]]
Sent: Thursday, April 21, 2016 12:42 PM
To: High Dynamic Range Imaging <[email protected]>
Subject: Re: [HDRI] input luminance (cd/m2) into HDR image via Photosphere
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
Hi Rob,
Thank you for your help. The problem was the creation of the small rectangle. I was clicking on the HDR image where the luminance meter was focused, but I didn't realize I needed to hold down the left button mouse button and draw a rectangle/box.
Thanks again,
Ben
···
-----Original Message-----
From: Guglielmetti, Robert [mailto:[email protected]]
Sent: Thursday, April 21, 2016 11:37 AM
To: High Dynamic Range Imaging <[email protected]>
Subject: Re: [HDRI] input luminance (cd/m2) into HDR image via Photosphere
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