Purdue University
School of Electrical and Computer Engineering

EE637 Digital Imaging Processing
Results of Matlab decimation example

Each of the following illustrates the effect of subsampling followed by interpolation using pixel replication.

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Original Image

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Decimation by 8 using subsampling without filtering

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Decimation by 4 using subsampling without filtering

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Decimation by 4 using block average filtering

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Decimation by 4 using ideal low pass filtering