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This commit is contained in:
John Cupitt 2010-11-10 21:45:03 +00:00
parent 526b441d5f
commit 297890cebd
2 changed files with 46 additions and 13 deletions
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2
libvips/morphology/im_rank.c
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@ -394,7 +394,7 @@ im_rank_raw( IMAGE *in, IMAGE *out, int xsize, int ysize, int order )
* @out: output image * @out: output image
* @width: window width * @width: window width
* @height: window height * @height: window height
* @order: select which * @order: select pixel
* *
* im_rank() does rank filtering on an image. A window of size @width by * im_rank() does rank filtering on an image. A window of size @width by
* @height is passed over the image. At each position, the pixels inside the * @height is passed over the image. At each position, the pixels inside the

57
libvips/morphology/im_rank_image.c
View File

@ -1,14 +1,10 @@
/* @(#) Sort a set of images, pixelwise, and pick out the index at each point. /* Sort a set of images, pixelwise, and pick out the index at each point.
* @(#)
* @(#) int im_rank_image( imarray, imout, no, index )
* @(#) IMAGE *imarray[], *imout;
* @(#) int no, index;
* @(#)
* @(#) All functions return 0 on success and -1 on error
* @(#)
* *
* 19/8/03 * 19/8/03
* - from im_maxvalue(), via im_gbandjoin() * - from im_maxvalue(), via im_gbandjoin()
* 10/11/10
* - gtkdoc
* - cleanups
*/ */
/* /*
@ -269,10 +265,28 @@ rank_gen( REGION *or, void *vseq, void *a, void *b )
return( 0 ); return( 0 );
} }
/* pair-wise rank of a vector of image descriptors. /**
* im_rank_image:
* @in: input image array
* @out: output image
* @n: number of input images
* @order: select pixel
*
* im_rank_image() sorts the input images pixel-wise, then outputs an image
* in which each pixel is selected from the sorted list by the
* @order parameter. For example, if @order
* is zero, then each output pixel will be the minimum of all the
* corresponding input pixels.
*
* It works for any uncoded, non-complex image type. All input images must
* match in size, format, and number of bands.
*
* See also: im_rank(), im_maxvalue().
*
* Returns: 0 on success, -1 on error
*/ */
int int
im_rank_image( IMAGE **in, IMAGE *out, int n, int index ) im_rank_image( IMAGE **in, IMAGE *out, int n, int order )
{ {
int i; int i;
Rank *rank; Rank *rank;
@ -281,7 +295,7 @@ im_rank_image( IMAGE **in, IMAGE *out, int n, int index )
im_error( "im_rank_image", "%s", _( "zero input images!" ) ); im_error( "im_rank_image", "%s", _( "zero input images!" ) );
return( -1 ); return( -1 );
} }
if( index < 0 || index > n - 1 ) { if( order < 0 || order > n - 1 ) {
im_error( "im_rank_image", im_error( "im_rank_image",
_( "index should be in range 0 - %d" ), n - 1 ); _( "index should be in range 0 - %d" ), n - 1 );
return( -1 ); return( -1 );
@ -297,7 +311,7 @@ im_rank_image( IMAGE **in, IMAGE *out, int n, int index )
im_check_bands_same( "im_rank_image", in[i], in[0] ) ) im_check_bands_same( "im_rank_image", in[i], in[0] ) )
return( -1 ); return( -1 );
if( !(rank = rank_new( in, out, n, index )) || if( !(rank = rank_new( in, out, n, order )) ||
im_cp_desc_array( out, rank->in ) || im_cp_desc_array( out, rank->in ) ||
im_demand_hint_array( out, IM_THINSTRIP, rank->in ) || im_demand_hint_array( out, IM_THINSTRIP, rank->in ) ||
im_generate( out, im_generate( out,
@ -307,6 +321,25 @@ im_rank_image( IMAGE **in, IMAGE *out, int n, int index )
return( 0 ); return( 0 );
} }
/**
* im_maxvalue:
* @in: input image array
* @out: output image
* @n: number of input images
*
* im_maxvalue() sorts the input images pixel-wise, then outputs an image
* in which each pixel is
* @order parameter. For example, if @order
* is zero, then each output pixel will be the minimum of all the
* corresponding input pixels.
*
* It works for any uncoded, non-complex image type. All input images must
* match in size, format, and number of bands.
*
* See also: im_rank(), im_maxvalue().
*
* Returns: 0 on success, -1 on error
*/
int int
im_maxvalue( IMAGE **in, IMAGE *out, int n ) im_maxvalue( IMAGE **in, IMAGE *out, int n )
{ {