[PD] Gem image analysis

[B. Bogart]

Hiya,

I get you now.

If you ignore the "position" of the centroid, then the "size" of the
blob will tell you how much motion is in the whole image. "size" is the
right-most outlet of pix_blob

B.

Max Neupert wrote:
> hi IOhannes, thomas, list
>
> sorry for beeing unclear, pix_blob seems already too intelligent for
> what i need. i do NOT want to TRACK anything. i just want to know if
> there is ANY motion in the image and not where.
> so again: it's not about tracking it is about movement.
> my approch was to use pix_movement because it provides the first step in
> the analysis: removing everything what stays. but how to “measure” the
> white areas after without tracking them? i am not interested in the
> coordinates of blobs.
>
> max
>
>
>
>
> Am 30.05.2005 um 17:09 schrieb IOhannes m zmoelnig:
>
>> Max Neupert wrote:
>>
>>> hi list,
>>> how do i turn a camera in a motion sensor?
>>> i can extract the movement with pix_movement, that's clear. but how
>>> to get a numeric value out of the whole picture corresponding to the
>>> pictures grayscale value?
>>> (not from a single pixel like pix_data supplies)
>>> am i completely overseeing something?
>>
>>
>> yes:
>> [pix_blob] does blob-detection (only 1 single blob though)
>> there should be an example-patch on how to do movement-detection with
>> this: 04.video/03.movement_detection.pd
>>
>> if using the CVS is an option for you, there is [pix_multiblob] which
>> is far better (detects multiple blobs, gives more information on them)
>>
>> there is even an abstraction (with example-patch) for blob-tracking.
>>
>> mfg.ad.sr
>> IOhannes
>>
>>
>>> max
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>>
>
>
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