Question

rying to get the video preview from a webcam in matlab. I dont know what Im doing wrong. Can someone help me?

Answer 1

Make sure you have package for this.

Answer 2

It is already installed. With an application software I can preview the video. I can even take a snapshot

Answer 3

this is my code:
vid = videoinput('winvideo',1);
preview(vid)

Answer 4

let me try it on my machine

Answer 5

and this is what I get:
??? Error using ==> videoinput.videoinput
There are no devices installed for the specified ADAPTORNAME. See IMAQHWINFO.

Error in ==> Untitled1 at 1
vid = videoinput('winvideo',1);

??? Error using ==> videoinput.videoinput
There are no devices installed for the specified ADAPTORNAME. See IMAQHWINFO.

Error in ==> Untitled1 at 1
vid = videoinput('winvideo',1);

Answer 6

It might not recognize your driver(webcam)

Answer 7

Do you have any idea how to fix it?

Answer 8

I downloaded the driver from the webcam site

Answer 9

Let me try your code on my computer

Answer 10

I have another one:

%Toma de imagen
vid = videoinput('winvideo',1,'YUY2_640x480');
set(vid,'ReturnedColorSpace','rgb');
opcion = 1;
while opcion > 0
preview(vid);
opcion = input('Digite:\n\n* 0 para salir,\n* 1 para capturar imagen.\n\n');
if (opcion==1)
imwrite(getsnapshot(vid),'test2.jpg');
imshow('test2.jpg')
end
end
close all
clc


it worked well one month ago

Answer 11

vid = videoinput('winvideo',1);
preview(vid)

Above piece of code works on my computer, so try re installing your driver

Answer 12

Ok im gonna restar my computer then. Dont go please

Answer 13

What are you working on,btw?

Answer 14

Image processing. Im working on a system that recognizes how many circles in a test have a tick. Then counting them in order to get a score for the student

Answer 15

And the immage my be taken from a webcam

Answer 16

ok Im comming back soon

Answer 17

That's pretty cool, very innovative

Answer 18

Yeah its working. No much I have to do it for my semester project

Answer 19

What class is it for?

Answer 20

Digital signal processing

Answer 21

Are you EE major?

Answer 22

Electrical Engineering