Hi,
You can recreate the functionality by writing your own function which takes as input the network obj and performs the following tasks:
- Initializes webcam
- Runs infinite while loop that exits when q is pressed
- Within while loop:
- Checks for 'q' keypress
- Captures and image and resizes the image
- Classifies the image
- Updates figure to display current image and classification label
A sample function "classifyVideo.m" is pasted below for your reference:
function [] = classifyVideo(net)
% Initialize webcam
cam = webcam;
% Initialize figure
hf = figure;
while 1
% compares the current character to q
% if 'q' is pressed exit
if strcmp(get(hf,'currentcharacter'),'q')
close(hf)
break
end
% Acquire a single image
rgbImage = snapshot(cam);
% Resize image to fit AlexNet dimensions
resizedImage = imresize(rgbImage, [227 227]);
% Classify Image
label = classify(net,resizedImage);
% Display the image.
imshow(rgbImage);
% Display label
title(label);
% Update figure
hold on;
drawnow
% force the event queue to flush
figure(hf)
drawnow
end
% Clear camera object
clear('cam');
end
You can quickly test the function using the following:
>> net = alexnet;
>> classifyVideo(net) ;
You will have to install the "MATLAB Support Package for USB Webcams" from Add-On Explorer to be able to use the "webcam" command in the function.
More information about webcam use with MATLAB can be found here:
