imShrink

PURPOSE ^

Used to shrink a multidimensional array I by integer amount.

SYNOPSIS ^

function I = imShrink( I, ratios )

DESCRIPTION ^

 Used to shrink a multidimensional array I by integer amount.

 ratios specifies the block dimensions.  For example, ratios=[2 3 4]
 shrinks a 3 dimensional array I by a factor of 2 along the first
 dimension, 3 along the secong and 4 along the third.  ratios must be
 strictly positive integers.  A value of 1 means no shrinking is done
 along a given dimension.

 Can handle very large arrays in a memory efficient manner. All the work
 is done by localSum with the 'block' shape flag.

 USAGE
  I = imShrink( I, ratios )

 INPUTS
  I       - k dimensional input array
  ratios  - k element int vector of shrinking factors

 OUTPUTS
  I       - shrunk version of input

 EXAMPLE
  load trees; I=ind2gray(X,map);
  I2 = imShrink( I, [2 2] );
  figure(1); im(I); figure(2); im(I2);

 See also IMRESIZE, LOCALSUM

 Piotr's Image&Video Toolbox      Version 2.12
 Copyright 2008 Piotr Dollar.  [pdollar-at-caltech.edu]
 Please email me if you find bugs, or have suggestions or questions!
 Licensed under the Lesser GPL [see external/lgpl.txt]

CROSS-REFERENCE INFORMATION ^

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