Help with ROS image acquisition and processing

Hi there, I am currently working on a project involving a Bebop 2, ROS, and Matlab.

Here is the dilemma. The goal for this project is to interact with the Bebop using Matlab.

I am having an issue while acquiring images from the bebop. I find this quite peculiar. This is a more or less situation but basically the longer I run the code the longer the delay in the image is.

my code is pretty simple,

cam = rossubscriber('/bebop/image_raw'); 
tic;
while toc < 500
databad = receive(cam);
data = readImage(databad);
imshow(data)
end

For what ever reason, the lag time in the image goes from .5 seconds to almost 5 seconds over the course of a few seconds.

If anyone can help that would be awesome!

Answer 1

[Andres Drago]

Could you solve the delay problem? I'm working with the BB2 + ROS + Matlab and i have a delay of 5~7 seconds.

Answer 2

[Srijith Vijay]

Did you try having a 'drawnow' after the 'imshow' command?

Something like:

...
...
imshow(data);
drawnow; % To refresh the image window with new image, instantaneously
..

[kasra azizi]

i tried it and thats not worked