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Determine block size for block processing
Syntax
siz = bestblk([m n],k) [mb,nb] = bestblk([m n],k)
Description
siz = bestblk([m n],k) returns, for an m-by-n image, the optimal block size for block processing. k is a scalar specifying the maximum row and column dimensions for the block; if the argument is omitted, it defaults to 100. siz is a 1-by-2 vector containing the row and column dimensions for the block.
[mb,nb] = bestblk([m n],k) returns the row and column dimensions for the block in mb and nb, respectively.
Algorithm
bestblk returns the optimal block size given m, n, and k. The algorithm for determining siz is:
m is less than or equal to k, return m.
m is greater than k, consider all values between min(m/10,k/2) and k. Return the value that minimizes the padding required.
n.
Example
siz = bestblk([640 800],72) siz = 64 50
See Also
blkproc