size min of blob for detec person but not an animail?

[raul_denia]

Hi.

What size of blob is ideal for detect motion of person but ignore medium animals?

Thanks.

[cordel]

Well that depends on your focal settings, the cams field of view, the distance you want to detect at, your size setting in ZM, etc, etc.
There is no one setting as it's different for almost every cam, you will have to experiment to tune the zones.

[raul_denia]

Ok, thanks.

You know any software that simulate a person and calculate the size of blob, etc?

Thanks

[cordel]

You could go stand in front of the cam, if you set it sensitive enough to alarm and have statistics enabled on ZM it will give you the blob sizes, alarmed pixels etc.

I think there is something in the wiki about tuning zones that a user had started.

[raul_denia]

Where is theses statistics enable?

Thanks!

[raul_denia]

I see the table of events, but don't find the blob size, the alarm pixels,etc.

Where are theses data?

Thanks

[raul_denia]

Ok, I find it!!!

Now I'm going to stdying the statistics.

Thanks!

[cordel]

You will find this information:

http://www.zoneminder.com/wiki/index.ph ... ing_Events

http://www.zoneminder.com/wiki/index.ph ... ne_Tunings

[agoodm]

The way I tuned my zones was to walk out in front of the camera and stand at the furthest distance from the camera where it would be useful to detect motion.

Then I replayed the footage and took a still of my standing away from the camera, loaded it into a photo editor and cropped the image to the size of my body.

Then looking at the image attibutes gave me the dimensions of the remaining space, I took the height and width and multiplied them to get a minumum number of changed pixels I wanted to cause an alarm.

I went into my zone and changed the units from percent to pixels. Then input the number I got from my previous calculation into the first two min fields, and subtracted 15% and put that number in the last minumum field.