Il giorno Tue, 02 Feb 2010 11:13:54 -0500
Frank Warmerdam ha scritto:
> Antonio Valentino wrote:
> > Anyway, IMHO the point here is not to decide if we have to
> > *modify* the diff function so that it returns abs(b1-b2).
> > Greg asked to add a new one ( abs(b1-b2) ) to the *base set* of
> > pix
On 02/03/2010 01:48 AM, Ivan wrote:
Even,
That was a little thing that I start years ago. Here is the usage:
{{{
#
=
# Usage Message
#
=
Even,
That was a little thing that I start years ago. Here is the usage:
{{{
# =
# Usage Message
# =
def Usage():
print 'Usage: mathbox.py
Even Rouault wrote:
For the record, I had started some time ago to work on something pretty close
to Frank's ideas. It was based on a "generic" expression evaluator that could
accept C-like expressions ( arithmetic operators, boolean operators, numeric
constants, a few predefined maths function
For the record, I had started some time ago to work on something pretty close
to Frank's ideas. It was based on a "generic" expression evaluator that could
accept C-like expressions ( arithmetic operators, boolean operators, numeric
constants, a few predefined maths functions, user variables, us
Antonio Valentino wrote:
Anyway, IMHO the point here is not to decide if we have to
*modify* the diff function so that it returns abs(b1-b2).
Greg asked to add a new one ( abs(b1-b2) ) to the *base set* of pixel
functions.
Stated that there is no technical difficulty to do this I'm wondering
what
Hi Andrew,
Il giorno Tue, 02 Feb 2010 10:43:27 -
"Andrew Brooks" ha scritto:
> Hi Antonio
>
> Your pixel function patch sounds interesting. I've not tried it yet,
thanks
> but how easy is it to create a stack of functions? For example if
> absdiff(b1.tif,b2.tif) is not available how wou
Hi Jukka,
Il giorno Tue, 2 Feb 2010 07:20:52 + (UTC)
Jukka Rahkonen ha scritto:
> Greg Coats mac.com> writes:
>
> >
> > I would prefer to obtain in one step the absolute value of the
> > difference
> between two pixels, in part because
> > I do not see the meaning of a negative pixel valu
Greg Coats mac.com> writes:
>
> I would prefer to obtain in one step the absolute value of the difference
between two pixels, in part because
> I do not see the meaning of a negative pixel value. In my example, I do not
see meaning to a signed byte value
> for a pixel channel being red=-51. Greg
