Digital image interpolator using a plurality of interpolation ke

Details Digital image interpolator using a plurality of interpolation ke Digital image interpolator using a plurality of interpolation ke

1991-05-14

1992-06-23

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 41, 358428, 364723, G06K 942, G06K 936, G06F 738

Patent

active

051250420

ABSTRACT:
An interpolator for enlarging or reducing a digital image includes an interpolation coefficient memory containing interpolation coefficients representing a one dimension interpolation kernel. A row interpolator receives image pixel values, retrieves interpolation coefficients from the memory, and produces interpolated pixel values by interpolating in a row direction. A column interpolator receives multiple rows of interpolated pixel values from the row interpolator, retrieves interpolation coefficients from the memory, and produces rows of interpolated pixel values by interpolating in a column direction.

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"Cubic Convolution Interpolation of Digital Image Processing", by Robert G. Keys, IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ALS, p. 29, No. 6, Dec. 1981, pp. 1153-1160.

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