79 Image Interpolation (Zero Filling)

For discussion purposes, consider an image display monitor with a 512 × 512 pixel resolution. The image acquisition matrix in MRI is often lower, and some interpolation is typically performed automatically. A straightforward approach is to place an empty pixel between pixels (step 1 in Fig. 79.1) and assign the amplitude of this pixel to be the average value of the adjacent pixels (linear interpolation, step 2 in Fig. 79.1).

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