Depth estimation from live video stream

I have two calibrated cameras and webcam support package and image acquisition toolbox. in this post depth is estimated from two recorded videos but my application is real-time and I want to estimate depth from live video stream. how can I do this ?

[Brattv]

Hi, It seems like your problem is the image acquisition. I dont have this toolbox myself but try this.

1. Call the function "gigecamlist" from the command window. This should return a model if your camera is GigE Vision compliant.

2. Create two camera objects with the "gigecam" function. Use the serial number that was found with the gigecamlist command to seperate them. The call should be something like

cameraLeft = gigecam('serialnumber')
cameraRight = gigecam('serialnumber')

3. Use the "snapshot" function to get the images.

[imageLeft tsLeft] = snapshot(cameraLeft)
[imageRight tsRight] = snapshot(cameraRight)

where ts is a timestamp.

[john john]

@Vegard Brattland : thanks for your help. in this case it should estimate depth from live video stream .is snapshot() works for this case?

[Brattv]

The snapshot function should return images from both of your cameras. I have no idea if this will work but try

frameLeft = imageLeft;
frameRight = imageRight;

[frameLeftRect, frameRightRect] = ...
    rectifyStereoImages(frameLeft, frameRight, stereoParams);

figure;
imshow(stereoAnaglyph(frameLeftRect, frameRightRect));
title('Rectified Video Frames');

Notice that the stereoParams should contain your calibration parameters.

Answer 1

[Brattv]

Posting the discussion in the comment as answer. Feel free to chose it if it solved the problem

1. Call the function "gigecamlist" from the command window. This should return a model if your camera is GigE Vision compliant.

2. Create two camera objects with the "gigecam" function. Use the serial number that was found with the gigecamlist command to seperate them. The call should be something like

cameraLeft = gigecam('serialnumber')
cameraRight = gigecam('serialnumber')

3. Use the "snapshot" function to get the images.

[imageLeft tsLeft] = snapshot(cameraLeft)
[imageRight tsRight] = snapshot(cameraRight)

The snapshot function should return images from both of your cameras. I have no idea if this will work but try

frameLeft = imageLeft;
frameRight = imageRight;
[frameLeftRect, frameRightRect] = ...
    rectifyStereoImages(frameLeft, frameRight, stereoParams);
figure;
imshow(stereoAnaglyph(frameLeftRect, frameRightRect));
title('Rectified Video Frames');