Loop-up table image scaling for rational factors

Details Loop-up table image scaling for rational factors Loop-up table image scaling for rational factors

1994-02-25

1995-04-25

Couso, Yon J.

Image analysis

Histogram processing

For setting a threshold

382 44, 345127, G06K 936

Patent

active

054106168

ABSTRACT:
A method and apparatus for scaling image pixel data by a rational scale factor of L/M utilizes look-up tables for input pixel addressing and convolution of up to two adjacent input pixels which offers an improved implementation of a conventional sampling rate conversion system wherein the input pixels are upsampled by a factor of L by inserting L-1 zeroes, interpolating the zero upsamples by finite impulse response techniques and down-sampling the interpolated data by a factor of M.

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