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454 lines
15 KiB
C++
454 lines
15 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2013 Miguel Casas-Sanchez <miguelecasassanchez@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-grabcut
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*
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*
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* This element is a wrapper around OpenCV grabcut implementation. GrabCut is an
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* image segmentation method based on graph cuts technique. It can be seen as a
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* way of fine-grain segmenting the image from some FG and BG "seed" areas. The
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* OpenCV implementation follows the article [1].
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* The "seed" areas are taken in this element from either an input bounding box
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* coming from a face detection, or from alpha channel values. The input box is
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* taken from a "face" event such as the one generated from the 'facedetect'
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* element. The Alpha channel values should be one of the following (cv.hpp):
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* enum{
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* GC_BGD = 0, //!< background
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* GC_FGD = 1, //!< foreground
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* GC_PR_BGD = 2, //!< most probably background
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* GC_PR_FGD = 3 //!< most probably foreground
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* };
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* with values over GC_PR_FGD interpreted as GC_PR_FGD. IN CASE OF no alpha mask
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* input (all 0's or all 1's), the 'GstOpenCvFaceDetect-face' downstream event
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* is used to create a bbox of PR_FG elements. If both foreground alpha
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* is not specified and there is no face detection, nothing is done.
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*
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* [1] C. Rother, V. Kolmogorov, and A. Blake, "GrabCut: Interactive foreground
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* extraction using iterated graph cuts, ACM Trans. Graph., vol. 23, pp. 309–314,
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* 2004.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch-1.0 --gst-debug=grabcut=4 v4l2src device=/dev/video0 ! videoconvert ! grabcut ! videoconvert ! video/x-raw,width=320,height=240 ! ximagesink
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* ]|
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* Another example launch line
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* |[
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* gst-launch-1.0 --gst-debug=grabcut=4 v4l2src device=/dev/video0 ! videoconvert ! facedetect display=0 ! videoconvert ! grabcut test-mode=true ! videoconvert ! video/x-raw,width=320,height=240 ! ximagesink
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* ]|
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <gst/gst.h>
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#include "gstgrabcut.h"
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extern "C"
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{
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#include <gst/video/gstvideometa.h>
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}
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GST_DEBUG_CATEGORY_STATIC (gst_grabcut_debug);
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#define GST_CAT_DEFAULT gst_grabcut_debug
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/* Filter signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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PROP_TEST_MODE,
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PROP_SCALE
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};
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#define DEFAULT_TEST_MODE FALSE
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#define DEFAULT_SCALE 1.6
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G_DEFINE_TYPE (GstGrabcut, gst_grabcut, GST_TYPE_VIDEO_FILTER);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGBA")));
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGBA")));
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static void gst_grabcut_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_grabcut_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_grabcut_transform_ip (GstVideoFilter * btrans,
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GstVideoFrame * frame);
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static gboolean gst_grabcut_set_info (GstVideoFilter * filter,
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GstCaps * incaps, GstVideoInfo * in_info,
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GstCaps * outcaps, GstVideoInfo * out_info);
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static void gst_grabcut_release_all_pointers (GstGrabcut * filter);
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static gboolean gst_grabcut_stop (GstBaseTransform * basesrc);
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static void compose_matrix_from_image (CvMat * output, IplImage * input);
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static int initialise_grabcut (struct grabcut_params *GC, IplImage * image_c,
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CvMat * mask_c);
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static int run_grabcut_iteration (struct grabcut_params *GC,
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IplImage * image_c, CvMat * mask_c, CvRect * bbox);
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static int run_grabcut_iteration2 (struct grabcut_params *GC,
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IplImage * image_c, CvMat * mask_c, CvRect * bbox);
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static int finalise_grabcut (struct grabcut_params *GC);
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/* initialize the grabcut's class */
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static void
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gst_grabcut_class_init (GstGrabcutClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
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GstVideoFilterClass *video_class = (GstVideoFilterClass *) klass;
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gobject_class->set_property = gst_grabcut_set_property;
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gobject_class->get_property = gst_grabcut_get_property;
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btrans_class->stop = gst_grabcut_stop;
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btrans_class->passthrough_on_same_caps = TRUE;
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video_class->transform_frame_ip = gst_grabcut_transform_ip;
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video_class->set_info = gst_grabcut_set_info;
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g_object_class_install_property (gobject_class, PROP_TEST_MODE,
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g_param_spec_boolean ("test-mode", "test-mode",
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"If true, the output RGB is overwritten with the segmented foreground. Alpha channel same as normal case ",
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DEFAULT_TEST_MODE, (GParamFlags)
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (gobject_class, PROP_SCALE,
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g_param_spec_float ("scale", "scale",
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"Grow factor for the face bounding box, if present", 1.0,
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4.0, DEFAULT_SCALE,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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gst_element_class_set_static_metadata (element_class,
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"Grabcut-based image FG/BG segmentation", "Filter/Effect/Video",
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"Runs Grabcut algorithm on input alpha. Values: BG=0, FG=1, PR_BG=2, PR_FGD=3; \
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NOTE: larger values of alpha (notably 255) are interpreted as PR_FGD too. \n\
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IN CASE OF no alpha mask input (all 0's or all 1's), the 'face' \
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downstream event is used to create a bbox of PR_FG elements.\n\
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IF nothing is present, then nothing is done.", "Miguel Casas-Sanchez <miguelecasassanchez@gmail.com>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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}
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/* initialize the new element
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* instantiate pads and add them to element
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* set pad calback functions
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* initialize instance structure
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*/
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static void
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gst_grabcut_init (GstGrabcut * filter)
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{
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filter->test_mode = DEFAULT_TEST_MODE;
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filter->scale = DEFAULT_SCALE;
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gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), FALSE);
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}
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static void
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gst_grabcut_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGrabcut *grabcut = GST_GRABCUT (object);
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switch (prop_id) {
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case PROP_TEST_MODE:
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grabcut->test_mode = g_value_get_boolean (value);
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break;
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case PROP_SCALE:
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grabcut->scale = g_value_get_float (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_grabcut_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstGrabcut *filter = GST_GRABCUT (object);
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switch (prop_id) {
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case PROP_TEST_MODE:
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g_value_set_boolean (value, filter->test_mode);
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break;
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case PROP_SCALE:
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g_value_set_float (value, filter->scale);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* GstElement vmethod implementations */
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/* this function handles the link with other elements */
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static gboolean
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gst_grabcut_set_info (GstVideoFilter * filter,
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GstCaps * incaps, GstVideoInfo * in_info,
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GstCaps * outcaps, GstVideoInfo * out_info)
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{
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GstGrabcut *grabcut = GST_GRABCUT (filter);
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CvSize size;
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size = cvSize (in_info->width, in_info->height);
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/* If cvRGBA is already allocated, it means there's a cap modification,
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so release first all the images. */
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if (NULL != grabcut->cvRGBAin)
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gst_grabcut_release_all_pointers (grabcut);
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grabcut->cvRGBAin = cvCreateImageHeader (size, IPL_DEPTH_8U, 4);
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grabcut->cvRGBin = cvCreateImage (size, IPL_DEPTH_8U, 3);
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grabcut->cvA = cvCreateImage (size, IPL_DEPTH_8U, 1);
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grabcut->cvB = cvCreateImage (size, IPL_DEPTH_8U, 1);
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grabcut->cvC = cvCreateImage (size, IPL_DEPTH_8U, 1);
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grabcut->cvD = cvCreateImage (size, IPL_DEPTH_8U, 1);
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grabcut->grabcut_mask = cvCreateMat (size.height, size.width, CV_8UC1);
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cvZero (grabcut->grabcut_mask);
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initialise_grabcut (&(grabcut->GC), grabcut->cvRGBin, grabcut->grabcut_mask);
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return TRUE;
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}
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/* Clean up */
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static gboolean
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gst_grabcut_stop (GstBaseTransform * basesrc)
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{
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GstGrabcut *filter = GST_GRABCUT (basesrc);
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if (filter->cvRGBAin != NULL)
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gst_grabcut_release_all_pointers (filter);
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return TRUE;
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}
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static void
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gst_grabcut_release_all_pointers (GstGrabcut * filter)
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{
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cvReleaseImage (&filter->cvRGBAin);
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cvReleaseImage (&filter->cvRGBin);
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cvReleaseImage (&filter->cvA);
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cvReleaseImage (&filter->cvB);
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cvReleaseImage (&filter->cvC);
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cvReleaseImage (&filter->cvD);
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finalise_grabcut (&(filter->GC));
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}
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static GstFlowReturn
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gst_grabcut_transform_ip (GstVideoFilter * btrans, GstVideoFrame * frame)
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{
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GstGrabcut *gc = GST_GRABCUT (btrans);
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gint alphapixels;
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GstVideoRegionOfInterestMeta *meta;
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meta = gst_buffer_get_video_region_of_interest_meta (frame->buffer);
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if (meta) {
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gc->facepos.x = (meta->x) - ((gc->scale - 1) * meta->w / 2);
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gc->facepos.y = (meta->y) - ((gc->scale - 1) * meta->h / 2);
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gc->facepos.width = meta->w * gc->scale * 0.9;
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gc->facepos.height = meta->h * gc->scale * 1.1;
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} else {
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memset (&(gc->facepos), 0, sizeof (gc->facepos));
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}
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gc->cvRGBAin->imageData = (char *) GST_VIDEO_FRAME_COMP_DATA (frame, 0);
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/* normally input should be RGBA */
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cvSplit (gc->cvRGBAin, gc->cvA, gc->cvB, gc->cvC, gc->cvD);
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cvCvtColor (gc->cvRGBAin, gc->cvRGBin, CV_BGRA2BGR);
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compose_matrix_from_image (gc->grabcut_mask, gc->cvD);
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/* Pass cvD to grabcut_mask for the graphcut stuff but that only if
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really there is something in the mask! otherwise -->input bbox is
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what we use */
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alphapixels = cvCountNonZero (gc->cvD);
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if ((0 < alphapixels) && (alphapixels < (gc->width * gc->height))) {
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GST_INFO ("running on mask");
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run_grabcut_iteration (&(gc->GC), gc->cvRGBin, gc->grabcut_mask, NULL);
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} else {
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if ((abs (gc->facepos.width) > 2) && (abs (gc->facepos.height) > 2)) {
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GST_INFO ("running on bbox (%d,%d),(%d,%d)", gc->facepos.x, gc->facepos.y,
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gc->facepos.width, gc->facepos.height);
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run_grabcut_iteration2 (&(gc->GC), gc->cvRGBin, gc->grabcut_mask,
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&(gc->facepos));
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} else {
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GST_WARNING ("No face info present, skipping frame.");
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return GST_FLOW_OK;
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}
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}
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/* if we want to display, just overwrite the output */
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if (gc->test_mode) {
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/* get only FG, PR_FG */
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cvAndS (gc->grabcut_mask, cvRealScalar (1), gc->grabcut_mask, NULL);
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/* (saturated) FG, PR_FG --> 255 */
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cvConvertScale (gc->grabcut_mask, gc->grabcut_mask, 255.0, 0.0);
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cvAnd (gc->grabcut_mask, gc->cvA, gc->cvA, NULL);
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cvAnd (gc->grabcut_mask, gc->cvB, gc->cvB, NULL);
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cvAnd (gc->grabcut_mask, gc->cvC, gc->cvC, NULL);
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}
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cvMerge (gc->cvA, gc->cvB, gc->cvC, gc->cvD, gc->cvRGBAin);
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if (gc->test_mode) {
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cvRectangle (gc->cvRGBAin,
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cvPoint (gc->facepos.x, gc->facepos.y),
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cvPoint (gc->facepos.x + gc->facepos.width,
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gc->facepos.y + gc->facepos.height), CV_RGB (255, 0, 255), 1, 8, 0);
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}
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return GST_FLOW_OK;
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}
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/* entry point to initialize the plug-in
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* initialize the plug-in itself
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* register the element factories and other features
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*/
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gboolean
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gst_grabcut_plugin_init (GstPlugin * plugin)
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{
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/* debug category for fltering log messages
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*
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*/
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GST_DEBUG_CATEGORY_INIT (gst_grabcut_debug, "grabcut",
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0,
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"Grabcut image segmentation on either input alpha or input bounding box");
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return gst_element_register (plugin, "grabcut", GST_RANK_NONE,
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GST_TYPE_GRABCUT);
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}
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void
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compose_matrix_from_image (CvMat * output, IplImage * input)
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{
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int x, y;
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for (x = 0; x < output->cols; x++) {
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for (y = 0; y < output->rows; y++) {
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CV_MAT_ELEM (*output, uchar, y, x) =
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(cvGetReal2D (input, y, x) <= cv::GC_PR_FGD) ? cvGetReal2D (input, y,
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x) : cv::GC_PR_FGD;
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}
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}
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}
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int
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initialise_grabcut (struct grabcut_params *GC, IplImage * image_c,
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CvMat * mask_c)
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{
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GC->image = (void *) new cv::Mat (image_c, false); /* "true" refers to copydata */
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GC->mask = (void *) new cv::Mat (mask_c, false);
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GC->bgdModel = (void *) new cv::Mat (); /* "true" refers to copydata */
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GC->fgdModel = (void *) new cv::Mat ();
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return (0);
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}
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int
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run_grabcut_iteration (struct grabcut_params *GC, IplImage * image_c,
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CvMat * mask_c, CvRect * bbox)
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{
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((cv::Mat *) GC->image)->data = (uchar *) image_c->imageData;
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((cv::Mat *) GC->mask)->data = mask_c->data.ptr;
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if (cvCountNonZero (mask_c))
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grabCut (*((cv::Mat *) GC->image), *((cv::Mat *) GC->mask), cv::Rect (),
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*((cv::Mat *) GC->bgdModel), *((cv::Mat *) GC->fgdModel), 1,
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cv::GC_INIT_WITH_MASK);
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return (0);
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}
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int
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run_grabcut_iteration2 (struct grabcut_params *GC, IplImage * image_c,
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CvMat * mask_c, CvRect * bbox)
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{
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((cv::Mat *) GC->image)->data = (uchar *) image_c->imageData;
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((cv::Mat *) GC->mask)->data = mask_c->data.ptr;
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grabCut (*((cv::Mat *) GC->image), *((cv::Mat *) GC->mask), *(bbox),
|
||
*((cv::Mat *) GC->bgdModel), *((cv::Mat *) GC->fgdModel), 1,
|
||
cv::GC_INIT_WITH_RECT);
|
||
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
finalise_grabcut (struct grabcut_params *GC)
|
||
{
|
||
delete ((cv::Mat *) GC->image);
|
||
delete ((cv::Mat *) GC->mask);
|
||
delete ((cv::Mat *) GC->bgdModel);
|
||
delete ((cv::Mat *) GC->fgdModel);
|
||
|
||
return (0);
|
||
}
|