Digital resampling integrated circuit for fast image resizing ap

Details Digital resampling integrated circuit for fast image resizing ap Digital resampling integrated circuit for fast image resizing ap

1996-08-23

1998-09-15

Couso, Yon J.

Image analysis

Image transformation or preprocessing

Changing the image coordinates

382300, 382260, G06K 932

Patent

active

058091823

ABSTRACT:
A resampling application specific integrated circuit (RSA) supports image interpolation or decimation by any arbitrary factor in order to provide flexibility, and utilizes a neighborhood of up to 9.times.9 pixels to produce image data of high quality. The RSA contains a separate vertical and horizontal filter units for vertical resizing and horizontal resizing operations, vertical and horizontal position accumulator units, a configuration register unit for loading the vertical and horizontal position accumulator units, and a memory management unit to interface the RSA to external memory banks. The vertical and horizontal filter units contain nine multipliers and nine corresponding coefficient memories, with each memory preferably containing storage space for thirty-two coefficients. The coefficients are addressed on a pixel by pixel basis in response to the outputs of the vertical and horizontal position accumulator units. The RSA is designed to handle an input data stream that contains multiple color components and simultaneously resizes all of the color components.

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