How much efficient is the histogram calculation provided by
OpenGL(glHistogram)? Is there any better way?

On Jul 4, 12:41=A0pm, Knockr <CSar...@gmail.com> wrote:
> How much efficient is the histogram calculation provided by
> OpenGL(glHistogram)?

It will depend on the graphics card ....

=2E.. but if you're imagining hardware acceleration and
parallel processing then I think it's 99% probable
that you'll be disappointed.


> Is there any better way?

Download the image in "tiles" in one thread
and use SSE instructions in another thread
to calculate the histogram of the blocks as
they arrive.


--
<\___/>
/ O O \
\_____/  FTB.     Remove my socks for email address.

On Jul 5, 5:26=A0pm, fungus <openglMYSO...@artlum.com> wrote:
> On Jul 4, 12:41=A0pm, Knockr <CSar...@gmail.com> wrote:
>
> > How much efficient is the histogram calculation provided by
> > OpenGL(glHistogram)?
>
> It will depend on the graphics card ....
>
> ... but if you're imagining hardware acceleration and
> parallel processing then I think it's 99% probable
> that you'll be disappointed.
>
> > Is there any better way?
>
> Download the image in "tiles" in one thread
> and use SSE instructions in another thread
> to calculate the histogram of the blocks as
> they arrive.
>
> --
> <\___/>
> / O O \
> \_____/ =A0FTB. =A0 =A0 Remove my socks for email address.

Thank you for your reply.