MATLAB Answers

ActiveX, Camera uEye

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Jirka Kolben
Jirka Kolben on 2 Sep 2011
Commented: Myrtle42 on 13 Jun 2018
Hello, i have uEye cam and i need control the camera by ActiveX interface in matlab.
code:
actxcontrollist
h=actxcontrol('UEYECAM.uEyeCamCtrl.1','position',[20 20 640 512]);
methods(h)
d=h.InitCamera(1)
But matlab show error dialog: ERROR while calling error function. Propably not initialized.
Please help me. Thanks

  1 Comment

Adam Wyatt
Adam Wyatt on 4 Jun 2015
I've created a file exchange submission which should significantly aid you all: File ID: #51099

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Accepted Answer

Adam Wyatt
Adam Wyatt on 9 Dec 2014
ActiveX uses the COM interface, which is now no longer supported by IDS (uEye cameras). It is now recommended to use the .NET interface, which is fairly similar to the end user). Here is an example:
Using the .NET assembly is not quite as straightforward as with C# because Matlab does not directly support pointers, but there is a workaround as pointed out below.
Remember to "EXIT" your camera before trying to re-initialise the same camera
% Add NET assembly if it does not exist
% May need to change specific location of library
asm = System.AppDomain.CurrentDomain.GetAssemblies;
if ~any(arrayfun(@(n) strncmpi(char(asm.Get(n-1).FullName), ...
'uEyeDotNet', length('uEyeDotNet')), 1:asm.Length))
NET.addAssembly(...
'C:\Program Files\IDS\uEye\Develop\DotNet\signed\uEyeDotNet.dll');
end
% Create camera object handle
cam = uEye.Camera;
% Open 1st available camera
% Returns if unsuccessful
if ~strcmp(char(cam.Init), 'SUCCESS')
error('Could not initialize camera');
end
% Set display mode to bitmap (DiB)
if ~strcmp(char(cam.Display.Mode.Set(uEye.Defines.DisplayMode.DiB)), ...
'SUCCESS')
error('Could not set display mode');
end
% Set colormode to 8-bit RAW
if ~strcmp(char(cam.PixelFormat.Set(uEye.Defines.ColorMode.SensorRaw8)), ...
'SUCCESS')
error('Could not set pixel format');
end
% Set trigger mode to software (single image acquisition)
if ~strcmp(char(cam.Trigger.Set(uEye.Defines.TriggerMode.Software)), 'SUCCESS')
error('Could not set trigger format');
end
% Allocate image memory
[ErrChk, img.ID] = cam.Memory.Allocate(true);
if ~strcmp(char(ErrChk), 'SUCCESS')
error('Could not allocate memory');
end
% Obtain image information
[ErrChk, img.Width, img.Height, img.Bits, img.Pitch] ...
= cam.Memory.Inquire(img.ID);
if ~strcmp(char(ErrChk), 'SUCCESS')
error('Could not get image information');
end
% Acquire image
if ~strcmp(char(cam.Acquisition.Freeze(true)), 'SUCCESS')
error('Could not acquire image');
end
% Extract image
[ErrChk, tmp] = cam.Memory.CopyToArray(img.ID);
if ~strcmp(char(ErrChk), 'SUCCESS')
error('Could not obtain image data');
end
% Reshape image
img.Data = reshape(uint8(tmp), [img.Width, img.Height, img.Bits/8]);
% Draw image
himg = imshow(img.Data, 'Border', 'tight');
% Acquire & draw 100 times
for n=1:100
% Acquire image
if ~strcmp(char(cam.Acquisition.Freeze(true)), 'SUCCESS')
error('Could not acquire image');
end
% Extract image
[ErrChk, tmp] = cam.Memory.CopyToArray(img.ID);
if ~strcmp(char(ErrChk), 'SUCCESS')
error('Could not obtain image data');
end
% Reshape image
img.Data = reshape(uint8(tmp), [img.Width, img.Height, img.Bits/8]);
% Draw image
set(himg, 'CData', img.Data);
drawnow;
end
% Close camera
if ~strcmp(char(cam.Exit), 'SUCCESS')
error('Could not close camera');
end

  2 Comments

Yarden Allon
Yarden Allon on 26 Jul 2015
Hi Adam, Do you know how to get a live video feed using the .NET interface?
Myrtle42
Myrtle42 on 13 Jun 2018
Hi Adam and Yarden -- I have the same question, wondering if anyone found a solution. I'd like to record video from an IDS uEye camera using the .NET interface in freerun mode to get the max framerate. Can anyone provide an example of 1) Configuring the camera in freerun mode and 2) Saving the resulting video as either .avi or mp4?

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More Answers (1)

Wolfgang
Wolfgang on 4 Aug 2014
Hi Jirka, did you manage to control the camera? I'm having similar problems at the moment... Thank you for your help!

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