I hadn't noticed before that this question is posted to the HDRI list, which may have a limited number of readers who are also using evalglare on Windows. It might be worthwhile to post your questions #1 and #2 to the radiance-general mailing list in this case. Those questions have more to do with successful use of evalglare and Radiance in Windows than they are specific to HDRI. To add to Lars' answer for question #3, please check this link: http://radiance-online.org/pipermail/radiance-general/2012-February/008353.html
Regards, Chris -----Original Message----- From: Lars O. Grobe [mailto:[email protected]] Sent: Saturday, October 05, 2013 12:07 PM To: High Dynamic Range Imaging Subject: Re: [HDRI] hdr imaging doubts - evalglare Hi Nithya, I think noone answered this so far. > 1.As evalglare software requires hdr images of 800x800 pixels, i tried > to get the pixel information using getinfo in DOS window from the > START button-> run->cmd. And while using pfilt command to divide x and > y by a number, it says pfilt is not recoznised as an internal or > external command. Is there another command to resize the image that > can be used with DOS window? Pfilt is a program coming with Radiance (www.radiance-online.org). It allows you to filter images in Radiance RGBE format, an HDR image format storing a wide range of radiance (or, sometimes, irradiance) values maintaining acceptable file sizes. However, it applies algorithms to the file that go beyond scaling the image size. I would thus propose to use pcomb instead, again, part of Radiance. Both tools provide a command-line interface, no graphical user interface. The syntax for pcomb to generate a 800 by 800 pixel version of big.hdr would be pcomb -x 800 -y 800 -o big.hdr > small.hdr The -o will revert any exposure-adjustments that may have been applied to your image before. small.hdr would be the image to be processed by evalglare. > 2. How shall i install the evalglare application? When i run evalglare > application by right clicking the setup file,a plain dos screen > appears.How shall i start with it? Evalglare is just one program that should be located in a directory included in your operating system's search path. No need for any kind of "installer". > 3. Will evalglare work well with hdr images other than fish-eye? Yes. However, you need to know the vertical illuminance than, which can be calculated from the pixel values in case that you have a 180 degrees fisheye. I guess you are working in some Windows environment. I have no experience with this, so my answers are pretty generic. You will need to know how to work on the command-line if you want to start using evalglare and Radiance HDR tools. This is not specific to HDRI, but to knowing your operating system. Many do not find Windows to be a very comfortable environment for such applications, I would rather go with a Linux or Mac OS installation, however it is not impossible. Good luck, cheers, Lars. _______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri ____________________________________________________________ Electronic mail messages entering and leaving Arup business systems are scanned for acceptability of content and viruses _______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri
