MATLAB Answers

0

No appropriate method, property, or field 'snapshot' for class 'matlab.gr​aphics.pri​mitive.Ima​ge'.

Asked by Niculai Traian on 20 Feb 2019
Latest activity Commented on by Niculai Traian on 20 Feb 2019
I am trying to use my android camera for object recognition and not the laptop webcam because with a better camera the results should be better, but i get this error: No appropriate method, property, or field 'snapshot' for class 'matlab.graphics.primitive.Image'. The connection to andriod camera is done using Ip webcam program (for android). Here is the code i use for the connection.
%%
url = 'http://192.168.1.2:8080/shot.jpg';
ss = imread(url);
fh = image(ss);
% while true
% ss = imread(url);
% set(fh,'CData',ss);
% drawnow;
% end
% camera = webcam; % Connect to the camera
nnet = Net; % Load the neural net
while true
ss = imread(url);
set(fh,'CData',ss);
picture = fh.snapshot; % Take a picture
picture = imresize(picture,[227,227]); % Resize the picture
label = classify(nnet, picture); % Classify the picture
image(picture); % Show the picture
title(char(label)); % Show the label
drawnow;
end

  4 Comments

Show 1 older comment
before trying to use android camera i was using this for webcamera: so i bealive that snapshot should use the variable i use to call the camera?
camera = webcam; % Connect to the camera
net = myNet; % Load the neural net
while true
picture = camera.snapshot; % Take a picture
picture = imresize(picture,[227,227]); % Resize the picture
label = classify(net, picture); % Classify the picture
image(picture); % Show the picture
title(char(label)); % Show the label
drawnow;
end
But there you call snapshot on a webcam object, which I guess does have a snapshot function. An image does not. You can probably just remove that line as you already have the image, you don't need to take a snapshot if you just start with a single image. although to resize it you will have to use
fh.CData
to get the actual image data rather than the image graphics object.
But i am not using a single image, i am trying to use the data from a live stream witch was possible with webcam

Sign in to comment.

Products


Release

R2018b

0 Answers