[Radiance-general] falsecolor scale adjustments

[Greg Ward]

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
>>>