|
![](/i/fill.gif) |
On 2 May 2000 23:16:20 -0400, ron### [at] povray org (Ron Parker)
wrote:
>On Tue, 02 May 2000 20:48:21 -0500, Chris Huff wrote:
>>Stuff I don't know how to implement, and don't think I can figure out,
>>but which I think is useful, information on these would be welcome:
>> emboss
>
>This is a matrix function, as long as you do it along one of the eight
>multiples of 45 degrees. For the usual "light in the upper left corner"
>effect, I believe the operation is
>
> -1 0 0
> 0 1 0 * .5 + .5
> 0 0 0
The numbers in the matrix above are correct. I'm not sure about the
multiplier and offset modifiers. For me, a vaue of one for the
multiplier works, and the offset value should be set to one-half of
the maximum possible value. I just tested these, and they work.
>> sharpen_edges, and other "sharpen" filters. Blurring is pretty easy
>>to figure out, but doing the opposite has me lost.
One type of sharpen filter:
-2 -2 -2
-2 32 -2
-2 -2 -2
Division Factor = 16
Bias, or Offset = 0
( Remove the "7" from 7no### [at] ezwv com to email me. )
Post a reply to this message
|
![](/i/fill.gif) |