convert frame from camera on laptop

i've got the code below:

    vid=videoinput('winvideo',1,'YUY2_1024x768');
    preview(vid);
    for k = 1:10
        frame = getsnapshot(vid);
    end
    frame1 = rgb2gray(frame);
    figure,image(frame1);
    level = graythresh(frame1);
    frame3 = im2bw(frame1,level);

    figure,image(frame3);
    delete(vid);
    closepreview(vid);

the problem here is that i don't know what type of image i can get from my camera on my laptop (RGB,HSV, or something else)! the result is not as i expect ! here is the result:

hope someone can help me !

Answer 1

[Walter Roberson]

dev_info = imaqhwinfo('winvideo', 1);
char(dev_info.SupportedFormats)

will show you the supported formats

[Chanh Nguyen]

thanks, but here is the result i get from matlab:

ans =

YUY2_1024x768 
YUY2_1280x1024
YUY2_160x120  
YUY2_176x144  
YUY2_320x240  
YUY2_352x288  
YUY2_640x480

and how can i fix my trouble with this result ?

[Walter Roberson]

https://www.mathworks.com/matlabcentral/newsreader/view_thread/241614

Answer 2

[Image Analyst]

The cameras I deal with all have an RGB mode. Why don't you just cut your losses and switch to a camera that uses an RGB mode? Otherwise you'll have to use ycbcr2rgb() to convert your yuy2 image into rgb. This page may be helpful: http://www.fourcc.org/yuv.php