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Image Acquisition Camera - High Speed - Fast Capture

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Jeremy
Jeremy 2013-2-11
评论： Walter Roberson 2018-1-5
Hello,
I am using Matlab 2012 with Image Acquisition Toolbox 2012.
I am using a generic webcam (Logitech Sphere AF) with the command
frame=getsnapshot(obj);
for image capture with the following default properties:
% % Device Specific Default Properties:
% BacklightCompensation = on
% Brightness = 128
% Contrast = 32
% Exposure = -7
% ExposureMode = auto
% Focus = 0
% FocusMode = auto
% FrameRate = 30.0000
% Gain = 0
% HorizontalFlip = off
% Pan = 0
% Saturation = 32
% Sharpness = 224
% Tilt = 0
% VerticalFlip = off
% WhiteBalance = 4000
% WhiteBalanceMode = auto
I am trying to find a faster camera model and property settings, if possible on a usb connection.
Does anyone have any suggestions for a specific camera model and associated manually configured properties settings for maximum frame capture speed?
Best, Jeremy

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采纳的回答

Thomas
Thomas 2013-2-23
编辑：Walter Roberson 2013-2-23
Jeremy,
We use the Thorlabs CMOS camera and get frame rates of several hundred Hertz using mex files, for regions of interest of 32 x 32 pixels. There is some memory management involved, and we use separate mex files for opening the camera (once per session), grabbing a frame, and closing the camera (once per session). We also have a mex file for setting the pixel clock, the exposure, and the frame rate. I don't promise it will work for you, but I've posted the files for the time being here, along with the code required to create the mex files and a demo m-file that tests it all out.
http://www.bifanofamily.com/Thorlabs_cam.zip
By the way, we also do SLM compensation through scattering media! Good luck.
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Walter Roberson
Walter Roberson 2018-1-5
Chris Stockbridge mentioned a File Exchange contribution; did you give that a try?

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更多回答（4 个）

Chris Stockbridge
Chris Stockbridge 2015-10-20
All of the files for working with the Thorlabs DCx series of cameras can now be found on the MATLAB file exchange here: Thorlabs DCx
Walter Roberson
Walter Roberson 2013-2-11
David Tarkowski
David Tarkowski 2013-2-11
Your question is a little vague, but I think that this example should help you out.
Jeremy
Jeremy 2013-2-11
Thank you for your response,
I am imaging the speckle pattern of light scattered through tissue from the beam output of a spatial light modulator for an adaptive optics experiment.
The modulator is controlled by an lcd with a frame rate of ~60Hz. I am trying to setup frame capture at this speed (~60Hz ; elapsed time 0.05 sec) or faster if possible. The decorrelation time constant for the tissue is 3-4secs so every little bit helps.
One option is to buy a Thorlabs DCC1545M and play with the mex interface(from previous thread below)
http://www.mathworks.com/matlabcentral/answers/35918
which is tricky but should enable optimization of device properties to achieve a faster frame rate.
I am searching for some specific cmos usb devices which have been shown to work with Matlab that have faster hardware performance than the above devices.
Jeremy

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