| 摘要 |
A bilinear decimator converts an input data sequence representing a high resolution image formed by N horizontal pixel lines to an output data sequence representing a lower resolution image formed by P horizontal pixel lines where N > P. The decimation ratio P/N can be any rational fraction. When the decimation ratio reduces to the form 1-(1/n), the decimator computes each output sequence data value as a simple weighted average of pixel data values for two vertically adjacent high resolution image pixels. When the decimation ratio is other than of the form 1-(1/n), the decimator adds additional terms to the computation of output pixel data values when necessary to compensate for aliasing errors.
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