Luminance image with ISO line and image definition

Replies to This Discussion

Permalink Reply by Sarith Subramaniam on December 4, 2015 at 8:35am

Can you post the HDR image that you get after the simulation ? It might be possible to do this without photoshop.

Permalink Reply by Alessandro Corso on December 4, 2015 at 11:48am

Hello Sarith,

Here there are the HDR image files.

Attachments:

• unnamed_IMG_interno.HDR, 415 KB
• unnamed_IMG_interno@fc.HDR, 209 KB

Permalink Reply by Sarith Subramaniam on December 4, 2015 at 3:45pm

Hi Alessandro,

See the images below. The idea is to run the analysis on the original image and then overlay the results of that analysis on an image with lower exposure.Hi Alessandro, I was able to make this work but not in Honeybee. Let's wait for Mostapha or Chris to reply on this.

Secondly, the DPI/resolution of the image can be improved by setting higher values for imageWidth and imageHeight in analysisRecipe.

@Mostapha/Chris: Falsecolor2 doesn't seem to support overlaying contours on a different image as per https://sites.google.com/site/tbleicher/radiance/falsecolor2. The way that I made this work was to use the falsecolor.pl that ships with Radiance. However, making that work with honeybee would require Perl to be installed. Do you guys currently require Perl as a dependency? Or maybe, there is a much simpler workaround than what I am suggesting !

Permalink Reply by Alessandro Corso on December 5, 2015 at 1:16am

Hi Sarith,

Thank you very much for your reply :)

It's possible to know in which way you made this work? Which software did you use?

Thank you again,

Alessandro

Permalink Reply by Sarith Subramaniam on December 5, 2015 at 1:47pm

Hi Alessandro,

I used Radiance  to process your image. 

Assuming that we start with the file that you posted,

the steps are:

1. Reduce the exposure of the original image and save it as a different file.

pfilt -e -2 unnamed_IMG_interno.HDR > unnamed_IMG_interno_filt.hdr

2.Use the original image and filtered image together in falsecolor. Falsecolor will do the analysis on the original image but overlay the results from the analysis on the filtered image.

falsecolor -cl -i unnamed_IMG_interno.hdr -p unnamed_IMG_interno_filt.hdr > unnamed_IMG_interno_contours.hdr

The issue is that falsecolor doesn't exist in the windows installation of Radiance as a .exe binary file. It exists as a .pl perl file. So, you'd have to have perl installed on your computer and added to your PATH variable to make this thing work smoothly. This is what I know/think anyway.

Permalink Reply by Alessandro Corso on December 5, 2015 at 2:13pm

Thank you so much for your explanation!

Alessandro 

Permalink Reply by Mostapha Sadeghipour Roudsari on December 6, 2015 at 9:17pm

I just gave it another try and you can follow the same process in Honeybee to adjust the exposure and then generate the FalseColor image.

Permalink Reply by Alessandro Corso on December 7, 2015 at 6:34am

Thank you Mostapha!

I think this way is quite easier! :)

Alessandro

Permalink Reply by Sarith Subramaniam on December 7, 2015 at 11:05am

I didn't notice till now that Honeybee had a script to set exposure for HDR. I agree, this is much simpler.

Permalink Reply by Mostapha Sadeghipour Roudsari on December 6, 2015 at 8:42pm

Hi Sarith and Alessandro,

Perl is not part of the installation requirements at this point and we are limited to what Falsecolor2 provides us. In the near future we'll ask everyone to install OpenStudio instead of installing Radiance and EnergyPlus separately. Strawberry-perl comes with OpenStudio which opens up opportunities for using Radiance's perl scripts.

Mostapha