limit the recognized area.

[lemorlenny]

Hi,
can i limit the recognized area to improve tracking speed?

Regards

Lenny

[Michael]

not sure what you are asking. Which project are you doing? What does your code do?

[lemorlenny]

I apologize for my cryptic question :).

I have to decode the position of a dot in a simple vertical fixed path, so I thought to optimize the recognize speed limiting the computing area to this path.
Is possibile to do it and this can improve computing speed?

Regards

Lenny

[Michael]

oh, so you are using code from this project? http://nootropicdesign.com/projectlab/2011/03/20/arduino-computer-vision/

Yes, you could easily limit the area you are interested in. Just change the bounds in the program. It currently searches the whole width and height of the screen with these loops:

for(int y=0;y
for(int x=0;x
...

}

} 

[lemorlenny]

Thanks for your reply this simple solution!.
And yes, i haven’t specified what project I meant, sorry.
My Video Experiment board is in shipping I hope it arrive fast so can i try it.

Regards

[chocolate7]

Dear Is possibile to do it and this can improve computing speed?

[lemorlenny]

@chocolate7 wrote:

Dear Is possibile to do it and this can improve computing speed?

You can limit the scan range editing the for next loop as show in previous post.
I built a responsive harpa laser in this manner with a classic Arduino.

Regards

[zohaa3492]

Just started putting a VE shield together. Wondering about placement of the digital/analog headers. The instructions show that the headers should be positioned using the inner rather than outer holes. Any reason for this? I want to be able to stack other shields on top of the VE shield & the instructions seem to preclude that.

Thanks in advance.

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[Michael]

If you have headers with long pins, you can place them on the outside set of pads so that the shield is “stackable”. When this product was designed, it was hard to get the long-pin headers. What other shield do you want to stack with the Video Experimenter? The VE is not going to be compatible to stack with most shields since the VE uses so many pins. You can always put the VE on top if you are going to stack it with a compatible shield.

[Author]

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