libraries/libkface: Added (KDE face recognition wrapper library).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

5 files changed, 550 insertions, 0 deletions

diff --git a/libraries/libkface/README b/libraries/libkface/README
new file mode 100644
index 000000000000..8ccd70bdbc4e
--- /dev/null
+++ b/libraries/libkface/README
@@ -0,0 +1,2 @@
+A Qt/C++ wrapper around LibFace library to perform face recognition
+and detection over pictures.
diff --git a/libraries/libkface/libkface.SlackBuild b/libraries/libkface/libkface.SlackBuild
new file mode 100644
index 000000000000..51dad62750aa
--- /dev/null
+++ b/libraries/libkface/libkface.SlackBuild
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+# Slackware build script for libkface
+
+# Copyright 2015 Willy Sudiarto Raharjo <willysr@slackbuilds.org>
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=libkface
+VERSION=${VERSION:-15.08.2}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.xz
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# patch to support OpenCV3
+# https://quickgit.kde.org/?p=libkface.git&a=commit&h=a53bcebbfc4e6c42ee73adddc41f8c2f8f8f39c8
+patch -p1 < $CWD/libkface.patch
+
+mkdir -p build
+cd build
+  cmake \
+    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
+    -DMAN_INSTALL_DIR=/usr/man \
+    -DENABLE_OPENCV3=ON \
+    -DCMAKE_BUILD_TYPE=Release ..
+  make
+  make install DESTDIR=$PKG
+cd ..
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a COPYING* AUTHORS README TODO $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/libraries/libkface/libkface.info b/libraries/libkface/libkface.info
new file mode 100644
index 000000000000..3f13e9582188
--- /dev/null
+++ b/libraries/libkface/libkface.info
@@ -0,0 +1,10 @@
+PRGNAM="libkface"
+VERSION="15.08.2"
+HOMEPAGE="https://www.digikam.org"
+DOWNLOAD="http://download.kde.org/stable/applications/15.08.2/src/libkface-15.08.2.tar.xz"
+MD5SUM="ab51bf06908c4580769fed3bd2e2d774"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="opencv"
+MAINTAINER="Willy Sudiarto Raharjo"
+EMAIL="willysr@slackbuilds.org"
diff --git a/libraries/libkface/libkface.patch b/libraries/libkface/libkface.patch
new file mode 100644
index 000000000000..dff5711b74e4
--- /dev/null
+++ b/libraries/libkface/libkface.patch
@@ -0,0 +1,418 @@
+From: Gilles Caulier <caulier.gilles@gmail.com>
+Date: Sat, 05 Sep 2015 19:20:22 +0000
+Subject: apply patch #94414 to support OpenCV3
+X-Git-Url: http://quickgit.kde.org/?p=libkface.git&a=commitdiff&h=a53bcebbfc4e6c42ee73adddc41f8c2f8f8f39c8
+---
+apply patch #94414 to support OpenCV3
+CCBUGS: 349601
+---
+
+
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -9,6 +9,8 @@
+ 
+ message(STATUS "----------------------------------------------------------------------------------")
+ message(STATUS "Starting CMake configuration for: libkface")
++
++option(ENABLE_OPENCV3 "Build libkface with OpenCV3 instead OpenCV2 (default=OFF)" OFF)
+ 
+ find_package(Qt4 4.6.0 REQUIRED)
+ find_package(KDE4 REQUIRED)
+@@ -30,7 +32,12 @@
+ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules)
+ 
+ include(MacroOpenCV)
+-DETECT_OPENCV(2.4.9 core highgui objdetect contrib legacy imgproc)
++
++if (ENABLE_OPENCV3)
++    DETECT_OPENCV(3.0.0 core face highgui objdetect imgproc)
++else()
++    DETECT_OPENCV(2.4.9 core highgui objdetect contrib legacy imgproc)
++endif()
+ 
+ include_directories(${OpenCV_INCLUDE_DIRS})
+ 
+
+--- a/README
++++ b/README
+@@ -20,6 +20,11 @@
+ libqt      >= 4.6.x                    http://www.qtsoftware.com
+ libkde     >= 4.4.x                    http://www.kde.org
+ libopencv  >= 2.4.9                    http://opencv.willowgarage.com/wiki    (with opencv 'haarcascades' data files)
++
++CMake compilation options to custom libkface:
++
++Use CMake "-DENABLE_OPENCV3=on"        flag to compile libkface source code using OpenCV3 instead OpenCV2 (disabled by default).
++                                       OpenCV3 support needs extra contrib modules package, especially 'face' and 'legacy' components.
+ 
+ -- INSTALL ------------------------------------------------------------
+ 
+
+--- a/libkface/CMakeLists.txt
++++ b/libkface/CMakeLists.txt
+@@ -1,5 +1,5 @@
+ #
+-# Copyright (c) 2010-2014, Gilles Caulier, <caulier dot gilles at gmail dot com>
++# Copyright (c) 2010-2015, Gilles Caulier, <caulier dot gilles at gmail dot com>
+ #
+ # Redistribution and use is allowed according to the terms of the BSD license.
+ # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+--- a/libkface/detection/opencvfacedetector.cpp
++++ b/libkface/detection/opencvfacedetector.cpp
+@@ -18,7 +18,7 @@
+  *         <a href="alexjironkin at gmail dot com">alexjironkin at gmail dot com</a>
+  * @author Copyright (C) 2010 by Aditya Bhatt
+  *         <a href="adityabhatt at gmail dot com">adityabhatt at gmail dot com</a>
+- * @author Copyright (C) 2010-2014 by Gilles Caulier
++ * @author Copyright (C) 2010-2015 by Gilles Caulier
+  *         <a href="mailto:caulier dot gilles at gmail dot com">caulier dot gilles at gmail dot com</a>
+  * @author Copyright (C) 2010-2013 by Marcel Wiesweg
+  *         <a href="mailto:marcel dot wiesweg at gmx dot de">marcel dot wiesweg at gmx dot de</a>
+@@ -136,13 +136,14 @@
+ 
+     cv::Size getOriginalWindowSize() const
+     {
++#if OPENCV_VERSION <= OPENCV_MAKE_VERSION(2,4,11)
+         // This is a HACK which may break any time. Work around the fact that getOriginalWindowSize()
+         // always returns (0,0) and we need these values.
+         if (oldCascade)
+         {
+             return oldCascade->orig_window_size;
+         }
+-
++#endif
+         return cv::Size(0, 0);
+     }
+ 
+
+--- a/libkface/libopencv.h.cmake.in
++++ b/libkface/libopencv.h.cmake.in
+@@ -7,7 +7,7 @@
+  * @date   2010-06-16
+  * @brief  Wrapper for OpenCV header files
+  *
+- * @author Copyright (C) 2012-2014 by Gilles Caulier
++ * @author Copyright (C) 2012-2015 by Gilles Caulier
+  *         <a href="mailto:caulier dot gilles at gmail dot com">caulier dot gilles at gmail dot com</a>
+  *
+  * This program is free software; you can redistribute it
+@@ -31,16 +31,16 @@
+ 
+ // Pragma directives to reduce warnings from OpenCV header files.
+ #if not defined(__APPLE__) && defined(__GNUC__)
+-#pragma GCC diagnostic push
+-#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+-#pragma GCC diagnostic ignored "-Woverloaded-virtual"
++#   pragma GCC diagnostic push
++#   pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
++#   pragma GCC diagnostic ignored "-Woverloaded-virtual"
+ #endif
+ 
+ #if defined(__APPLE__) && defined(__clang__)
+-#pragma clang diagnostic push
+-#pragma clang diagnostic ignored "-Wnon-virtual-dtor"
+-#pragma clang diagnostic ignored "-Woverloaded-virtual"
+-#pragma clang diagnostic ignored "-Wcast-align"
++#   pragma clang diagnostic push
++#   pragma clang diagnostic ignored "-Wnon-virtual-dtor"
++#   pragma clang diagnostic ignored "-Woverloaded-virtual"
++#   pragma clang diagnostic ignored "-Wcast-align"
+ #endif
+ 
+ // OpenCV includes
+@@ -51,23 +51,30 @@
+ #define OPENCV_VERSION                         OPENCV_MAKE_VERSION(CV_MAJOR_VERSION,CV_MINOR_VERSION,CV_SUBMINOR_VERSION)
+ #define OPENCV_TEST_VERSION(major,minor,patch) ( OPENCV_VERSION >= OPENCV_MAKE_VERSION(major,minor,patch) )
+ 
+-#include <opencv2/core/core.hpp>
+-#include <opencv2/core/internal.hpp>
+-#include <opencv2/contrib/contrib.hpp>
++#if OPENCV_TEST_VERSION(3,0,0)
++#   include <opencv2/face.hpp>
++#   include <opencv2/core.hpp>
++#else
++#   include <opencv2/core/core.hpp>
++#   include <opencv2/core/internal.hpp>
++#   include <opencv2/contrib/contrib.hpp>
++#endif
+ 
+ // for old-style code
++#if OPENCV_VERSION <= OPENCV_MAKE_VERSION(2,4,11)
++#   include <opencv2/legacy/compat.hpp>
++#endif
+ #include <opencv2/opencv.hpp>
+-#include <opencv2/legacy/compat.hpp>
+ #include <opencv2/highgui/highgui_c.h>
+ #include <opencv/cvaux.h>
+ 
+ // Restore warnings
+ #if not defined(__APPLE__) && defined(__GNUC__)
+-#pragma GCC diagnostic pop
++#   pragma GCC diagnostic pop
+ #endif
+ 
+ #if defined(__APPLE__) && defined(__clang__)
+-#pragma clang diagnostic pop
++#   pragma clang diagnostic pop
+ #endif
+ 
+ #endif // LIB_OPEN_CV_H
+
+--- a/libkface/recognition-opencv-lbph/facerec_borrowed.cpp
++++ b/libkface/recognition-opencv-lbph/facerec_borrowed.cpp
+@@ -531,15 +531,17 @@
+     return ptr;
+ }
+ 
+-CV_INIT_ALGORITHM(LBPHFaceRecognizer, "FaceRecognizer.LBPH-KFaceIface",
+-                  obj.info()->addParam(obj, "radius",     obj.m_radius);
+-                  obj.info()->addParam(obj, "neighbors",  obj.m_neighbors);
+-                  obj.info()->addParam(obj, "grid_x",     obj.m_grid_x);
+-                  obj.info()->addParam(obj, "grid_y",     obj.m_grid_y);
+-                  obj.info()->addParam(obj, "threshold",  obj.m_threshold);
+-                  obj.info()->addParam(obj, "histograms", obj.m_histograms);         // modification: Make Read/Write
+-                  obj.info()->addParam(obj, "labels",     obj.m_labels);             // modification: Make Read/Write
+-                  obj.info()->addParam(obj, "statistic",  obj.m_statisticsMode));    // modification: Add parameter
++#if OPENCV_VERSION <= OPENCV_MAKE_VERSION(2,4,11)
++    CV_INIT_ALGORITHM(LBPHFaceRecognizer, "FaceRecognizer.LBPH-KFaceIface",
++                      obj.info()->addParam(obj, "radius",     obj.m_radius);
++                      obj.info()->addParam(obj, "neighbors",  obj.m_neighbors);
++                      obj.info()->addParam(obj, "grid_x",     obj.m_grid_x);
++                      obj.info()->addParam(obj, "grid_y",     obj.m_grid_y);
++                      obj.info()->addParam(obj, "threshold",  obj.m_threshold);
++                      obj.info()->addParam(obj, "histograms", obj.m_histograms);         // modification: Make Read/Write
++                      obj.info()->addParam(obj, "labels",     obj.m_labels);             // modification: Make Read/Write
++                      obj.info()->addParam(obj, "statistic",  obj.m_statisticsMode));    // modification: Add parameter
++#endif
+ 
+ } // namespace KFaceIface
+ 
+
+--- a/libkface/recognition-opencv-lbph/facerec_borrowed.h
++++ b/libkface/recognition-opencv-lbph/facerec_borrowed.h
+@@ -45,7 +45,11 @@
+ namespace KFaceIface
+ {
+ 
++#if OPENCV_TEST_VERSION(3,0,0)
++class LBPHFaceRecognizer : public cv::face::FaceRecognizer
++#else
+ class LBPHFaceRecognizer : public cv::FaceRecognizer
++#endif
+ {
+ public:
+ 
+@@ -99,8 +103,13 @@
+ 
+     ~LBPHFaceRecognizer() {}
+ 
++#if OPENCV_TEST_VERSION(3,0,0)
++    using cv::face::FaceRecognizer::save;
++    using cv::face::FaceRecognizer::load;
++#else
+     using cv::FaceRecognizer::save;
+     using cv::FaceRecognizer::load;
++#endif
+ 
+     static cv::Ptr<LBPHFaceRecognizer> create(int radius=1, int neighbors=8, int grid_x=8, int grid_y=8, double threshold = DBL_MAX, PredictionStatistics statistics = NearestNeighbor);
+ 
+@@ -139,6 +148,34 @@
+     /**
+      * Getter functions.
+      */
++#if OPENCV_TEST_VERSION(3,0,0)
++
++    int getNeighbors() const                             { return m_neighbors;            }
++    void setNeighbors(int _neighbors)                    { m_neighbors = _neighbors;      }
++
++    int getRadius()    const                             { return m_radius;               }
++    void setRadius(int radius)                           { m_radius = radius;             }
++
++    int getGrid_x()    const                             { return m_grid_x;               }
++    void setGrid_x(int _grid_x)                          { m_grid_x = _grid_x;            }
++
++    int getGrid_y()    const                             { return m_grid_y;               }
++    void setGrid_y(int _grid_y)                          { m_grid_y = _grid_y;            }
++
++    double getThreshold() const                          { return m_threshold;            }
++    void setThreshold(double _threshold)                 { m_threshold = _threshold;      }
++
++    void setHistograms(std::vector<cv::Mat> _histograms) { m_histograms = _histograms;    }
++    std::vector<cv::Mat> getHistograms() const           { return m_histograms;           }
++
++    void setLabels(cv::Mat _labels)                      { m_labels = _labels;            }
++    cv::Mat getLabels() const                            { return m_labels;               }
++
++    void setStatistic(int _statistic)                    { m_statisticsMode = _statistic; }
++    int getStatistic() const                             { return m_statisticsMode;       }
++
++#else
++
+     int neighbors() const { return m_neighbors; }
+     int radius()    const { return m_radius;    }
+     int grid_x()    const { return m_grid_x;    }
+@@ -146,6 +183,8 @@
+ 
+     // NOTE: Implementation done through CV_INIT_ALGORITHM macro from OpenCV.
+     cv::AlgorithmInfo* info() const;
++
++#endif
+ 
+ private:
+ 
+
+--- a/libkface/recognition-opencv-lbph/lbphfacemodel.cpp
++++ b/libkface/recognition-opencv-lbph/lbphfacemodel.cpp
+@@ -61,7 +61,11 @@
+     : cv::Ptr<LBPHFaceRecognizer>(LBPHFaceRecognizer::create()),
+       databaseId(0)
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setThreshold(100.0);
++#else
+     ptr()->set("threshold", 100.0);
++#endif
+ }
+ 
+ LBPHFaceModel::~LBPHFaceModel()
+@@ -80,9 +84,13 @@
+ 
+ const LBPHFaceRecognizer* LBPHFaceModel::ptr() const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    const LBPHFaceRecognizer* const ptr = cv::Ptr<LBPHFaceRecognizer>::operator KFaceIface::LBPHFaceRecognizer*();
++#else
+     const LBPHFaceRecognizer* const ptr = cv::Ptr<LBPHFaceRecognizer>::operator const KFaceIface::LBPHFaceRecognizer*();
+-
+-    if (!ptr) 
++#endif
++
++    if (!ptr)
+         kWarning() << "LBPHFaceRecognizer pointer is null";
+ 
+     return ptr;
+@@ -90,47 +98,83 @@
+ 
+ int LBPHFaceModel::radius() const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    return ptr()->getRadius();
++#else
+     return ptr()->get<int>("radius");
++#endif
+ }
+ 
+ void LBPHFaceModel::setRadius(int radius)
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setRadius(radius);
++#else
+     ptr()->set("radius", radius);
++#endif
+ }
+ 
+ int LBPHFaceModel::neighbors() const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    return ptr()->getNeighbors();
++#else
+     return ptr()->get<int>("neighbors");
++#endif
+ }
+ 
+ void LBPHFaceModel::setNeighbors(int neighbors)
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setNeighbors(neighbors);
++#else
+     ptr()->set("neighbors", neighbors);
++#endif
+ }
+ 
+ int LBPHFaceModel::gridX() const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    return ptr()->getGrid_x();
++#else
+     return ptr()->get<int>("grid_x");
++#endif
+ }
+ 
+ void LBPHFaceModel::setGridX(int grid_x)
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setGrid_x(grid_x);
++#else
+     ptr()->set("grid_x", grid_x);
++#endif
+ }
+ 
+ int LBPHFaceModel::gridY() const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    return ptr()->getGrid_y();
++#else
+     return ptr()->get<int>("grid_y");
++#endif
+ }
+ 
+ void LBPHFaceModel::setGridY(int grid_y)
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setGrid_y(grid_y);
++#else
+     ptr()->set("grid_y", grid_y);
++#endif
+ }
+ 
+ OpenCVMatData LBPHFaceModel::histogramData(int index) const
+ {
++#if OPENCV_TEST_VERSION(3,0,0)
++    return OpenCVMatData(ptr()->getHistograms().at(index));
++#else
+     return OpenCVMatData(ptr()->get<std::vector<cv::Mat> >("histograms").at(index));
++#endif
+ }
+ 
+ QList<LBPHistogramMetadata> LBPHFaceModel::histogramMetadata() const
+@@ -168,12 +212,24 @@
+         m_histogramMetadata << metadata;
+     }
+ 
++#if OPENCV_TEST_VERSION(3,0,0)
++    std::vector<cv::Mat> currentHistograms = ptr()->getHistograms();
++    cv::Mat currentLabels                  = ptr()->getLabels();
++#else
+     std::vector<cv::Mat> currentHistograms = ptr()->get<std::vector<cv::Mat> >("histograms");
+     cv::Mat currentLabels                  = ptr()->get<cv::Mat>("labels");
++#endif
++
+     currentHistograms.insert(currentHistograms.end(), newHistograms.begin(), newHistograms.end());
+     currentLabels.push_back(newLabels);
++
++#if OPENCV_TEST_VERSION(3,0,0)
++    ptr()->setHistograms(currentHistograms);
++    ptr()->setLabels(currentLabels);
++#else
+     ptr()->set("histograms", currentHistograms);
+-    ptr()->set("labels", currentLabels);
++    ptr()->set("labels",     currentLabels);
++#endif
+ 
+ /*
+     //Most cumbersome and inefficient way through a file storage which we were forced to use if we used standard OpenCV
+@@ -215,7 +271,11 @@
+ 
+     // Update local information
+     // We assume new labels are simply appended
++#if OPENCV_TEST_VERSION(3,0,0)
++    cv::Mat currentLabels = ptr()->getLabels();
++#else
+     cv::Mat currentLabels = ptr()->get<cv::Mat>("labels");
++#endif
+ 
+     for (int i = m_histogramMetadata.size() ; i < currentLabels.rows ; i++)
+     {
+
diff --git a/libraries/libkface/slack-desc b/libraries/libkface/slack-desc
new file mode 100644
index 000000000000..d48907b19ba4
--- /dev/null
+++ b/libraries/libkface/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+        |-----handy-ruler------------------------------------------------------|
+libkface: libkface (KDE face recognition wrapper library)
+libkface:
+libkface: A Qt/C++ wrapper around LibFace library to perform face recognition
+libkface: and detection over pictures.
+libkface: This library is used by kipi-plugins, digiKam and others.
+libkface:
+libkface:
+libkface:
+libkface:
+libkface: For more information, visit:  https://www.digikam.org
+libkface: