how to count only adjacent(linked) 1's quantity in 7X7 matrix buffer using fpga?

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Have a look at the Lutz Algorithm - Ive seen it implemented in an FPGA before:

http://comjnl.oxfordjournals.org/content/23/3/262.full.pdf

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Tricky, thank you so much your answer.

i was considerate like breadth first search algorithm. but restrict condition is time. i have to calculate yellow('1') q'ty in 13X13 matrix within 108us(short time).

now i am learning linked information that you suggest to me. maybe much time need because i am beginner. if i solve then i will replay. thank you.