/usr/include/iulib/imglabels.h is in libiulib-dev 0.4+is+0.3-3ubuntu1.
This file is owned by root:root, with mode 0o644.
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// Copyright 2006 Deutsches Forschungszentrum fuer Kuenstliche Intelligenz
// or its licensors, as applicable.
// Copyright 1995-2005 Thomas M. Breuel
//
// You may not use this file except under the terms of the accompanying license.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you
// may not use this file except in compliance with the License. You may
// obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Project: iulib -- image understanding library
// File: imglabels.h
// Purpose: interface to corresponding .cc file
// Responsible: tmb
// Reviewer:
// Primary Repository:
// Web Sites: www.iupr.org, www.dfki.de
#ifndef h_imglabels__
#define h_imglabels__
#include "colib/colib.h"
namespace iulib {
/// Propagate labels across the entire image from a set of non-zero seeds.
void propagate_labels(colib::intarray &image);
void propagate_labels_to(colib::intarray &target,colib::intarray &seed);
bool dontcare(int x);
void remove_dontcares(colib::intarray &image);
int renumber_labels(colib::intarray &image,int start);
/// Label the connected components of an image.
int label_components(colib::intarray &image,bool four_connected=false);
void simple_recolor(colib::intarray &image);
void bounding_boxes(colib::narray<colib::rectangle> &result,colib::intarray &image);
/// bitreverse per channel to get some interesting colors for sequentially numbered regions
inline int interesting_colors(int x) {
int r = 0;
int g = 0;
int b = 0;
for(int i=0;i<8;i++) {
r = (r<<1) | (x&1); x >>= 1;
g = (g<<1) | (x&1); x >>= 1;
b = (b<<1) | (x&1); x >>= 1;
}
return (r<<16)|(g<<8)|b;
}
}
#endif
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