Camera Properties/Configure Selected

When I use the imaqtool with only one of my cameras connected to the computer I am able to access only very few camera settings. However when I plug a second camera into my computer and hit preview a dialog box comes up that prompts me to choose my camera. In this dialogue box there is a button that says "configure selected" that has many more camera properties for me to edit(and they all work). I would like to know how I can edit these with just a single camera plugged in, and how I could go about accessing them from my own code.

Specifically I'm very interested in manipulating the exposure time, but it does not show up when I use get(vid) or get(getselectedsource(vid)) etc. It seems to be only accessible from this configure selected window which only shows up when two cameras are plugged in. I am using winvideo, it is a Scorpion PointGrey camera, Matlab R2012b.

Answer 1

[Image Analyst]

Did you try something like this:

vidobj = videoinput('lumeneraimaqW32', 1, '4008x2672'); % Replace with your camera.
src = getselectedsource(vidobj);
src.Exposure = scrollbarValue; % Or some number that you want.  I get mine from a scrollbar.

[Edward Ronan]

Hi, thanks for the reply. I did try this but it just returns "Invalid property: 'Exposure'."

The only properties that come up with get(getselectedsource(vid)) are gain/brightness/gamma which are editable in the imaqtool. However the configure selected window allows me to edit brightness/exposure/gamma/shutter/gain/frame rate. It seems to only be editable from this GUI though. It's obvious that matlab knows about these other properties I just can't find any way to access them outside of the configure selected window of the imaqtool GUI.

[Image Analyst]

Maybe try the brightness property.

Otherwise, I don't know and it's difficult for me to debug without your camera so I suggest you contact the Mathworks or the camera manufacturer.