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1D Catmull-Rom cubic interpolation performed one direction at a time IS the same as 2D Catmull-Rom bicubic

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This commit is contained in:
Nicolas Robidoux 2010-05-18 17:01:12 +00:00
parent fe1143f650
commit 4f9e33aaf4
1 changed files with 3 additions and 6 deletions
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9
libvips/resample/bicubic.cpp
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@ -29,9 +29,6 @@
/* Bicubic (catmull-rom) interpolator derived from Nicolas Robidoux's /* Bicubic (catmull-rom) interpolator derived from Nicolas Robidoux's
* original YAFR resampler with permission and thanks. * original YAFR resampler with permission and thanks.
*
* Note: This may actually be an implementation of a Keys bicubic
* convolution method. To be checked.
*/ */
/* /*
@ -79,9 +76,9 @@ typedef struct _VipsInterpolateBicubic {
typedef struct _VipsInterpolateBicubicClass { typedef struct _VipsInterpolateBicubicClass {
VipsInterpolateClass parent_class; VipsInterpolateClass parent_class;
/* Precalculated interpolation matricies. int (used for pel sizes up /* Precalculated interpolation matrices. int (used for pel
* to short), and double (for all others). We go to scale + 1, so * sizes up to short), and double (for all others). We go to
* we can round-to-nearest safely. * scale + 1, so we can round-to-nearest safely.
*/ */
/* We could keep a large set of 2d 4x4 matricies, but this actually /* We could keep a large set of 2d 4x4 matricies, but this actually