change the resolution in image acquired by webcam command

the command i am using is

vid = webcam;
img= snapshot(vid);

and is there also a way i can crop the input image to specified region of interest?

Answer 1

[sanakhan]

cam.AvailableResolutions

check your camera available resolutions

Change the resolution.

cam.Resolution = '630x400';

for more help check the following link

https://www.mathworks.com/help/supportpkg/usbwebcams/ug/set-properties-for-webcam-acquisition.html

[Walter Roberson]

Correct. On some cameras you can request a resolution, and on some cameras you can request a crop. What you can do with a particular camera can depend on which interface you use for it, which connector and which driver. IP and GigE cameras tend to be more configurable.

Answer 2

[sanakhan]

pls clarify ur question