real time speckle fringe detection

[viswa]

Hello all,

                   I have been trying to write a vi to detect real time dynamic vibration of a vibrating object using PULNIX 2013P CCD camera with 50 frames/sec. I am using PCI-1407 frame grabber and LV 7 version. I also attached an algorithm written in MS word. please kindly have a look at it and also attached my trial VI.  My problem is i am unable to configure single buffer there are vi's available to configure buffer list but i dont know its storage time between each frame and location of the buffers. I want to store intially 3 frames in 3 different buffers with time delay of 1/50 of a sec between 3 of them then after 3rd buffer should update itself every 1/50 sec. This updated frames should be passed to subsequent frames. finally subtraction 2 frames will dispay fringes in real time. Please help me out .......i am completely lost.....

[mickeyw]

Hi,

Many thanks for contacting the National Instruments forum. Unfortunately we do not have the sufficient resources to write complete applications for customers. If you do require this service, may I suggest contacting one of our alliance members at www.ni.com/alliance/ who will be able to help you with implementing your algorithm.

With regards to your acquisition, could you not use a grab function and then for every iteration of the loop write to a buffer? Also, are you using a Windows OS? As this is not a time deterministic system this will affect the results depending on how busy the processor is.

[viswa]

Hi Mike,

                i am using windows OS only. I am using also LV versions 6.1 and 7.0 which were installed in the same PC.  I did not have GRAB vi in IMAQ 2.5.4 and in vision 6.1. So i was trying to write vi using extract buffer and etc.....Thanks for your valuable information about alliance.....i will look into it.

regards

visu