DC - Decimate image/volume

(3/12/99)

PURPOSE

Decimate 2-D or 3-D real image/volume by discarding pixels.   Example.

SEE ALSO

DC S [Decimate image - Sum neighboring pixels]
IP [Interpolate/Resize using bilinear/trilinear interpolation]

USAGE

.OPERATION: DC

.INPUT FILE: VOL001
[Enter name of input file.]

.OUTPUT FILE: VOL002
[Enter name of output file.]

If input file is an image, SPIDER asks:

.DECIMATION FACTORS FOR X & Y: 3, 2
[Enter decimation factors for NX and NY dimensions. Factors are integers.]

If input file is a volume, SPIDER asks:

.DECIMATION FACTORS FOR X, Y, & Z: 3, 2, 3
[Enter decimation factor for NX, NY, & NZ dimensions. Factors are integers.]

NOTES

  1. In the above example, the dimensions of the the output file will be reduced to NX/3, NY/2, NZ/3. Only every third, second, and third (in respective dimensions) voxels will be retained, the remaining voxels will be skipped.

  2. Pixel size in header is updated.

SUBROUTINES

DECIMATE

CALLER

VTIL2

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