Correct typo in comment for out parameter of inverlut() and remove some trailing whitespace
This commit is contained in:
Alistair Thomas
parent
0563330b43
commit
103452c3ee
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@ -1,7 +1,7 @@
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/* invert a lut
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*
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* Written on: 5/6/01
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* Modified on :
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* Modified on :
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*
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* 7/7/03 JC
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* - generate image rather than doublemask (arrg)
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@ -17,7 +17,7 @@
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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@ -65,7 +65,7 @@ typedef struct _VipsInvertlut {
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/* Input image.
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*/
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VipsImage *in;
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VipsImage *in;
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/* .. and cast to a matrix.
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*/
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@ -119,31 +119,31 @@ vips_invertlut_build_init( VipsInvertlut *lut )
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int x, y;
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if( !lut->mat ||
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lut->mat->Xsize < 2 ||
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lut->mat->Xsize < 2 ||
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lut->mat->Ysize < 1 ) {
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vips_error( class->nickname, "%s", _( "bad input matrix" ) );
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return( -1 );
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}
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if( lut->size < 1 ||
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if( lut->size < 1 ||
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lut->size > 65536 ) {
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vips_error( class->nickname, "%s", _( "bad size" ) );
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return( -1 );
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}
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if( !(lut->buf =
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if( !(lut->buf =
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VIPS_ARRAY( NULL, lut->size * (lut->mat->Xsize - 1), double )) )
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return( -1 );
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if( !(lut->data = VIPS_ARRAY( NULL, lut->mat->Ysize, double * )) )
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return( -1 );
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for( y = 0; y < lut->mat->Ysize; y++ )
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for( y = 0; y < lut->mat->Ysize; y++ )
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lut->data[y] = VIPS_MATRIX( lut->mat, 0, y );
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/* Sanity check for data range.
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*/
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for( y = 0; y < lut->mat->Ysize; y++ )
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for( x = 0; x < lut->mat->Xsize; x++ )
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if( lut->data[y][x] > 1.0 ||
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for( y = 0; y < lut->mat->Ysize; y++ )
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for( x = 0; x < lut->mat->Xsize; x++ )
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if( lut->data[y][x] > 1.0 ||
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lut->data[y][x] < 0.0 ) {
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vips_error( class->nickname,
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_( "element (%d, %d) is %g, "
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@ -204,10 +204,10 @@ vips_invertlut_build_create( VipsInvertlut *lut )
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/* Inside the loop to avoid /0 errors for last ==
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* (size - 1).
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*/
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double fac = (1 - lut->data[height - 1][0]) /
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double fac = (1 - lut->data[height - 1][0]) /
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((lut->size - 1) - last);
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lut->buf[b + k * bands] =
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lut->buf[b + k * bands] =
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lut->data[height - 1][0] + (k - last) * fac;
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}
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@ -255,17 +255,17 @@ vips_invertlut_build( VipsObject *object )
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return( -1 );
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if( vips_check_matrix( class->nickname, lut->in, &lut->mat ) )
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return( -1 );
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return( -1 );
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if( vips_invertlut_build_init( lut ) ||
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vips_invertlut_build_create( lut ) )
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return( -1 );
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return( -1 );
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vips_image_init_fields( create->out,
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lut->size, 1, lut->mat->Xsize - 1,
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VIPS_FORMAT_DOUBLE, VIPS_CODING_NONE,
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lut->size, 1, lut->mat->Xsize - 1,
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VIPS_FORMAT_DOUBLE, VIPS_CODING_NONE,
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VIPS_INTERPRETATION_HISTOGRAM, 1.0, 1.0 );
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if( vips_image_write_line( create->out, 0, (VipsPel *) lut->buf ) )
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if( vips_image_write_line( create->out, 0, (VipsPel *) lut->buf ) )
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return( -1 );
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return( 0 );
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@ -285,14 +285,14 @@ vips_invertlut_class_init( VipsInvertlutClass *class )
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vobject_class->description = _( "build an inverted look-up table" );
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vobject_class->build = vips_invertlut_build;
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VIPS_ARG_IMAGE( class, "in", 0,
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_( "Input" ),
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VIPS_ARG_IMAGE( class, "in", 0,
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_( "Input" ),
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_( "Matrix of XY coordinates" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsInvertlut, in ) );
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G_STRUCT_OFFSET( VipsInvertlut, in ) );
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VIPS_ARG_INT( class, "size", 5,
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_( "Size" ),
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VIPS_ARG_INT( class, "size", 5,
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_( "Size" ),
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_( "LUT size to generate" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsInvertlut, size ),
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@ -303,13 +303,13 @@ vips_invertlut_class_init( VipsInvertlutClass *class )
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static void
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vips_invertlut_init( VipsInvertlut *lut )
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{
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lut->size = 256;
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lut->size = 256;
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}
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/**
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* vips_invertlut: (method)
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* @in: input mask
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* @out: (out): utput LUT
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* @out: (out): output LUT
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* @...: %NULL-terminated list of optional named arguments
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*
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* Optional arguments:
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@ -320,9 +320,9 @@ vips_invertlut_init( VipsInvertlut *lut )
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* will map reals to targets. Handy for linearising images from
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* measurements of a colour chart. All values in [0,1]. Piecewise linear
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* interpolation, extrapolate head and tail to 0 and 1.
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*
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*
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* Eg. input like this:
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*
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*
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* <tgroup cols='4' align='left' colsep='1' rowsep='1'>
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* <tbody>
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* <row>
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@ -352,12 +352,12 @@ vips_invertlut_init( VipsInvertlut *lut )
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*
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* Means a patch with 10% reflectance produces an image with 20% in
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* channel 1, 30% in channel 2, and 10% in channel 3, and so on.
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*
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*
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* Inputs don't need to be sorted (we do that). Generate any precision
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* LUT, default to 256 elements.
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*
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* It won't work too well for non-monotonic camera responses
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* (we should fix this). Interpolation is simple piecewise linear; we ought to
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* It won't work too well for non-monotonic camera responses
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* (we should fix this). Interpolation is simple piecewise linear; we ought to
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* do something better really.
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*
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* See also: vips_buildlut().
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