[Radiance-general] falsecolor scale adjustments

[Kristen Garibaldi]

Much appreciated all! Thanks!!!

Kristen

-----Original Message-----
From: Greg Ward [mailto:gregoryjward at gmail.com] 
Sent: Thursday, August 10, 2017 4:14 PM
To: Radiance general discussion
Subject: Re: [Radiance-general] falsecolor scale adjustments

While it's true that the minimum is always zero if you are using the default linear scale, setting a log scale allows you to (indirectly) specify the minimum as the scale setting divided by 10^N specified using the "-log N" option.  (And "N" can be any positive value.)

I checked, and the setting I recommended works for your example.

Cheers,
-Greg

> From: Axel Jacobs <jacobs.axel at gmail.com>
> Date: August 10, 2017 1:01:01 PM PDT
> 
> With the official Radiance version of falsecolor (coded in Perl), there is no way of adjusting the lower end of the scale.
> 
> Cheer
> Axel
> 
> On 10/08/17 20:50, Greg Ward wrote:
>> Hi Kristen,
>> If I understand your question, you essentially want to have 6 log divisions with a maximum of 10000 cd/m^2.  I think the following will work with falsecolor:
>> falsecolor -log 6 -s 10000 -i image.hdr > image_fc.hdr I guess you 
>> are not asking about the color scale itself, which should be the same 
>> as the default palette in falsecolor.  (Running "falsecolor -palettes 
>> > pal.hdr" will show you the standard palattes you may choose from.) 
>> Cheers, -Greg
>>> *From: *Kristen Garibaldi <Kristen.Garibaldi at arup.com 
>>> <mailto:Kristen.Garibaldi at arup.com>>
>>> 
>>> *Date: *August 10, 2017 12:41:57 PM PDT
>>> 
>>> *
>>> *
>>> 
>>> Hello all!
>>> 
>>> I'm attempting to customize the falsecolor scale to match the below scale (generated in photosphere) but unable to decipher the options required.  Any insights on the -s and -log multipliers necessary?  Is there a way to manually set the low end of the scale?
>>> 
>>> Thanks for your help! So very appreciated!
>>> 
>>> Kristen
>>> 

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