Re: Determining row of pixels among a group that has the max number

homer123123123@[EMAIL PROTECTED]
 wrote:
> Hello,
> 
> I am a newbie to the area of image processing. I have  a 30pixel by
> 30pixel greyscale image. It consists of 30 groups of 1x10 pixels. I
> need to find out which of the these groups has the maximum number of
> pixels above a given threshold. The brute force way would be to
> determine the number of pixels that are above a given threshold in
> each of the 1x10pixels. Then, repeat this procedure for all 30 groups.
> Sort them and then determine the group.

Seems like it is either 90 of 10x1 pixels or 30 of 30x1. And sounds a 
bit like a homework question. But even so a hint or two may not go amiss.
> 
> Is there an easier way to do this using some kind of filter or some
> algorithm. I need to do this in hardware and will have to estimate the
> power efficiency of the two techniques.

If it was being programmed you could keep track of block with the best 
threshold N found so far and if it ever reaches 10 return an immediate 
result. You can give up on any blocks where 10-N have failed the 
threshold test (you already have a better block).
> 
> Any help is much appreciated.

Regards,
Martin Brown
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