DSP or FPGA for high-speed image processing?

Question

Hi,I am going to start a project of onboard high-speed CMOS imageprocessing.I am goint to perform certain *block matching algorithm* or *FourierTransform* between successive frames and the fps would be 1000 ormore..The interface between the CMOS camera and the board is standordCamLink.I've learned that both DSP and FPGA based circuits can do certainonboard image processing tasks, and I'd like to know whick is better?DSP or FPGA?I know some corporations use FPGA based boards as development boardsfor their cameras. And my cooperators have some DSP developmentexperiences. So, the question arises, and I want your suggestions. I'dlike to know the advantages of each choise and maybe the direction ofonboard realtime high-speed image processing.Thanks! Any help would be appreciated.

Tim Wescott · Accepted Answer

Please go to wikipedia and look up "cross post".  Compare what they haveto say about cross posting with what they have to say about multipleposting.Then do it right.-- Tim WescottWescott Design ServicesPosting from Google?  See "Applied Control Theory for Embedded Systems" came out in April.See details at

Martin Thompson · Answer

Hi,What size of frame?  That's a lot of memory-bandwidth!Do you mean Camera Link?  There's VGA resolution cameras that'll do1000fps that way.  What's the end application?It depends.  Sorry!However, I think a single DSP is going to struggle to do a 2D FT ofeven a VGA image at 1000 fps.  And once you go beyond a single DSP, myopinion is you might as well go to FPGA as you have a lot moreflexibility in how you parallelise things then.If you want to do *really* high speed processing, FPGAs are a sensiblechoice.  Assuming your algorithms are a) parallelisable and b)actually compute limited, not memory latency or bandwidth limited.Cheers,Martin--  TRW Conekt - Consultancy in Engineering, Knowledge and Technology

kyori · Answer

Thanks for your advice and I am learning the rules.Tim Wescott wrote:

kyori · Answer

Hi,Thanks for your reply.256*256 frame (or even small) size will be ok.Generally the algorithm is kind of correlation of two sucessive frames.Best regards,kyoriMart

DSP or FPGA for high-speed image processing?

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