Question: Suppose there is a frame with some image.I want to display only those parts which have pixel intensity above 120 or 130. How can I do that with OpenCv ? Is there any commands to do so?
Then i need to set those parts to some intensity of 190.

Answer: 
This should do the trick for you.

```
$('#dropdownID').val("Value to be selected");

```
try this

```
$('[id*=_dropdown]').val("--Select--");

```