stuff
This commit is contained in:
John Cupitt
parent
2872fc8eb8
commit
531feb10a1
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@ -43,6 +43,7 @@
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- add IM_SWAP
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- dilate/erode do (!=0) on non-uchar images
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- add multipass Orc to im_conv(), 3.5x faster for 5x5 mask
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- im_profile() works for any image format, any number of bands
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12/5/10 started 7.22.2
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- the conditional image of ifthenelse can be any format, a (!=0) is added if
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4
TODO
4
TODO
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@ -1,7 +1,3 @@
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- gtkdoc for im_profile() next
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- nip2-7.22.3 on Windows is not adding the path you load from to the set of
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@ -1,21 +1,12 @@
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/* @(#) dir = 0:
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* @(#) For each vertical line, find the position of the first
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* @(#) non-zero pixel from the top. Output is USHORT with
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* @(#) width = input width, height = 1.
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* @(#)
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* @(#) dir = 1:
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* @(#) For each horizontal line, find the position of the first
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* @(#) non-zero pixel from the left. Output is USHORT with
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* @(#) width = 1, height = input height
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* @(#)
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* @(#) int im_profile( IMAGE *in, IMAGE *out, int dir )
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* @(#)
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* @(#) Returns 0 on success and non-zero on error
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/* find image profiles
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*
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* 11/8/99 JC
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* - from im_cntlines()
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* 22/4/04
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* - now outputs horizontal/vertical image
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* 9/11/10
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* - any image format, any number of bands
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* - gtk-doc
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*/
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/*
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@ -55,23 +46,57 @@
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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/**
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* im_profile:
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* @in: input image
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* @out: output image
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* @dir: search direction
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*
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* im_profile() searches inward from the edge of @in and finds the
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* first non-zero pixel. It outputs an image containing a list of the offsets
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* for each row or column.
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*
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* If @dir == 0, then im_profile() searches down from the top edge, writing an
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* image as wide as the input image, but only 1 pixel high, containing the
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* number of pixels down to the first non-zero pixel for each column of input
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* pixels.
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*
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* If @dir == 1, then im_profile() searches across from the left edge,
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* writing an image as high as the input image, but only 1 pixel wide,
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* containing the number of pixels across to the
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* first non-zero pixel for each row of input pixels.
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*
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* See also: im_cntlines().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_profile( IMAGE *in, IMAGE *out, int dir )
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{
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int x, y;
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int sz;
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unsigned short *buf;
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int x, y, b;
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/* If in is not uchar, do (!=0) to make a uchar image.
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*/
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if( in->BandFmt != IM_BANDFMT_UCHAR ) {
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IMAGE *t;
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if( !(t = im_open_local( out, "im_profile", "p" )) ||
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im_notequalconst( in, t, 0 ) )
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return( -1 );
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in = t;
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}
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/* Check im.
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*/
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if( im_iocheck( in, out ) )
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if( im_iocheck( in, out ) ||
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im_check_uncoded( "im_profile", in ) ||
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im_check_format( "im_profile", in, IM_BANDFMT_UCHAR ) )
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return( -1 );
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if( in->Coding != IM_CODING_NONE || in->BandFmt != IM_BANDFMT_UCHAR ||
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in->Bands != 1 ) {
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im_error( "im_profile", "%s",
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_( "1-band uchar uncoded only" ) );
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return( -1 );
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}
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if( dir != 0 && dir != 1 ) {
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if( dir != 0 &&
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dir != 1 ) {
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im_error( "im_profile", "%s", _( "dir not 0 or 1" ) );
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return( -1 );
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}
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@ -90,19 +115,22 @@ im_profile( IMAGE *in, IMAGE *out, int dir )
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out->BandFmt = IM_BANDFMT_USHORT;
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if( im_setupout( out ) )
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return( -1 );
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if( !(buf = IM_ARRAY( out, out->Xsize, unsigned short )) )
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sz = IM_IMAGE_N_ELEMENTS( out );
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if( !(buf = IM_ARRAY( out, sz, unsigned short )) )
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return( -1 );
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if( dir == 0 ) {
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/* Find vertical lines.
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*/
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for( x = 0; x < in->Xsize; x++ ) {
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PEL *p = (PEL *) IM_IMAGE_ADDR( in, x, 0 );
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for( x = 0; x < sz; x++ ) {
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PEL *p = (PEL *) IM_IMAGE_ADDR( in, 0, 0 ) + x;
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int lsk = IM_IMAGE_SIZEOF_LINE( in );
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for( y = 0; y < in->Ysize; y++ )
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if( p[y * lsk] )
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for( y = 0; y < in->Ysize; y++ ) {
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if( *p )
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break;
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p += lsk;
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}
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buf[x] = y;
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}
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@ -111,22 +139,28 @@ im_profile( IMAGE *in, IMAGE *out, int dir )
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return( -1 );
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}
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else {
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/* Count horizontal lines.
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/* Search horizontal lines.
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*/
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for( y = 0; y < in->Ysize; y++ ) {
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PEL *p = (PEL *) IM_IMAGE_ADDR( in, 0, y );
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for( x = 0; x < in->Xsize; x++ )
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if( p[x] )
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break;
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for( b = 0; b < in->Bands; b++ ) {
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PEL *p1;
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buf[0] = x;
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p1 = p + b;
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for( x = 0; x < in->Xsize; x++ ) {
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if( *p1 )
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break;
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p1 += in->Bands;
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}
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buf[b] = x;
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}
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if( im_writeline( y, out, (PEL *) buf ) )
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return( -1 );
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}
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}
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return( 0 );
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}
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