[PD] Gem image analysis
IOhannes m zmoelnig
zmoelnig at iem.at
Tue May 31 16:41:31 CEST 2005
chris clepper wrote:
> On May 31, 2005, at 2:07 AM, IOhannes m zmoelnig wrote:
>
>>> The last outlet is for the Z axis and, as near as I can tell, the code
>>
>> whatever "Z" means.
>> it definitely knows nothing about the z-axis in a 3dimensional space.
>
>
> The variable is labeled m_zOut throughout the source code. It sure
> looks like an attempt to map magnitude of the image brightness to the Z
> axis to me, but then again I didn't write the thing.
but i did ;-)
don't know why i named it m_zOut though (i guess, because there was m_x
and m_z and "z" seemed to be the natural 3rd variable)
>
> I wasn't trying to contradict anything, but rather explain how the
i didn't feel you where contradicting anything. sorry if i appeared to
react that way.
> object came up with that value. It's sometimes helpful to know that
> sort of thing.
right and i am very thankful for the explanation.
i just thought that i should give my 2% too.
>> if you are not sure, experiment with both and see what gives better
>> results
>
> pix_background would come before pix_movement and strip away data which
> could potentially cause false triggers.
which sounds totally reasonable to me.
>
>> well, if he does "NOT want to TRACK anything" but just detect if there
>> is any movement in the image, your suggestion seems to be a bit
>> overpowered (nonetheless it should work fine)
>
>
> pix_movement + pix_blob give me enough false values that I recommend
> using additional analysis to give more consistent results. That's all.
right.
now it's me who didn't want to contradict anything.
all the best
IOhannes
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