[Radiance-general] RE : how to use pfilt to perform anti-aliasing

[Ji Zhang]

Dear Radiance experts,

Two more questions about rad:

One of the options of the rad program is explained in the rad menu as:

[ *-n|-N* *npr* ]


1. Does this mean the "-n" and "-N npr" options are mutually exclusive?

2. Does "-N 3" mean the task to generate an .hdr image will be split
into 3 parallel rendering processes by Radiance behind the scene
regardless of the number of CPUs and number of "cores" within each CPU
of the computer?

Thanks!

Ji



On Thu, Jun 16, 2011 at 1:36 AM, Ji Zhang <hope.zh at gmail.com> wrote:

> Thanks a lot, Lars! It is the problem of the third "800" value carelessly
> specified for "RESOLUTION".
>
> Cheers, Ji
>
>
>
>
> On Wed, Jun 15, 2011 at 5:11 PM, Lars O. Grobe <grobe at gmx.net> wrote:
>
>> Hi!
>>
>>
>>  The content of the test.rif file is:
>>>
>> (...)
>>
>>> RESOLUTION= 800 800 800
>>>
>>
>> Why do you have three times 800 here? Looks like the third one gets
>> interpreted as pixel aspect (-pa), which leads to the weird result that
>> pfilt tries to downsample from a resolution of 2400x2400px to 800x1px.
>>
>> Try
>>
>> RESOLUTION= 800 800
>>
>>
>> Cheers, Lars.
>>
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>>
>
>
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