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Virtual buttons are pressed by itself

June 13, 2011 - 6:56am #1


I have created an application with 17 virtual buttons. Random buttons are pressed automatically.

also I noticed that, when i run the Qualcomm Virtual Buttons demo using unity package -the one with the pot with 4 colors button- and open the Image on the computer screen, buttons are pressed automatically, and pot color is changed without pressing any button.

Note: I'm using the Virtual buttons best practices, each button contains many features points and I'm using some logic to prevent camera clip effect by waiting 3 seconds before responding to the button click.

Can I find help here?

Thanks in advance.

Re: Virtual buttons are pressed by itself

June 14, 2011 - 9:53am #4

Hello az,

Uneven lighting can cause false button activation. An uneven surface in the location of the virtual button can cause uneven lighting and possible false button activation. Can you place the buttons in a location that is guaranteed to be flat?


Re: Virtual buttons are pressed by itself

June 14, 2011 - 1:29am #3

Dear Peter,

Thanks for the reply.

As for my project, I am tracking from a printout not from the monitor. And for the Qualcomm pot tutorial, I know it works well from a printout, I just wanted to know if there are similar issues in both cases. Issues might be related to lighting effects or others.

So, what are the other factors that affect buttons activation?

Latest notes:
- it is not a problem of the number of buttons, as only one button is activated automatically.
- if the printout is flat, everything is good, but if it's been folded a little problem occurs.

I wont always guarantee that the printout is flat, so is there a way to get rid of that effect?


Re: Virtual buttons are pressed by itself

June 13, 2011 - 5:55pm #2

Hello az,

Tracking off a computer monitor is not recommended. The refresh rate on some computer monitors can cause poor tracking and false virtual button activation. If you print out the target you should not see the automatic button activation. For your project with 17 virtual buttons, are you tracking off the computer monitor or a printout?

If your project requires tracking off a monitor, you may want to try changing the monitors refresh.


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