mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
405 lines
14 KiB
C++
405 lines
14 KiB
C++
/*
|
||
* GStreamer
|
||
* Copyright (C) 2013 Miguel Casas-Sanchez <miguelecasassanchez@gmail.com>
|
||
*
|
||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||
* copy of this software and associated documentation files (the "Software"),
|
||
* to deal in the Software without restriction, including without limitation
|
||
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
* and/or sell copies of the Software, and to permit persons to whom the
|
||
* Software is furnished to do so, subject to the following conditions:
|
||
*
|
||
* The above copyright notice and this permission notice shall be included in
|
||
* all copies or substantial portions of the Software.
|
||
*
|
||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||
* DEALINGS IN THE SOFTWARE.
|
||
*
|
||
* Alternatively, the contents of this file may be used under the
|
||
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
|
||
* which case the following provisions apply instead of the ones
|
||
* mentioned above:
|
||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Library General Public
|
||
* License as published by the Free Software Foundation; either
|
||
* version 2 of the License, or (at your option) any later version.
|
||
*
|
||
* This library is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Library General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Library General Public
|
||
* License along with this library; if not, write to the
|
||
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
||
* Boston, MA 02110-1301, USA.
|
||
*/
|
||
|
||
/**
|
||
* SECTION:element-grabcut
|
||
*
|
||
*
|
||
* This element is a wrapper around OpenCV grabcut implementation. GrabCut is an
|
||
* image segmentation method based on graph cuts technique. It can be seen as a
|
||
* way of fine-grain segmenting the image from some FG and BG "seed" areas. The
|
||
* OpenCV implementation follows the article [1].
|
||
* The "seed" areas are taken in this element from either an input bounding box
|
||
* coming from a face detection, or from alpha channel values. The input box is
|
||
* taken from a "face" event such as the one generated from the 'facedetect'
|
||
* element. The Alpha channel values should be one of the following (cv.hpp):
|
||
* enum{
|
||
* GC_BGD = 0, //!< background
|
||
* GC_FGD = 1, //!< foreground
|
||
* GC_PR_BGD = 2, //!< most probably background
|
||
* GC_PR_FGD = 3 //!< most probably foreground
|
||
* };
|
||
* with values over GC_PR_FGD interpreted as GC_PR_FGD. IN CASE OF no alpha mask
|
||
* input (all 0's or all 1's), the 'GstOpenCvFaceDetect-face' downstream event
|
||
* is used to create a bbox of PR_FG elements. If both foreground alpha
|
||
* is not specified and there is no face detection, nothing is done.
|
||
*
|
||
* [1] C. Rother, V. Kolmogorov, and A. Blake, "GrabCut: Interactive foreground
|
||
* extraction using iterated graph cuts, ACM Trans. Graph., vol. 23, pp. 309–314,
|
||
* 2004.
|
||
*
|
||
* ## Example launch line
|
||
*
|
||
* |[
|
||
* gst-launch-1.0 --gst-debug=grabcut=4 v4l2src device=/dev/video0 ! videoconvert ! grabcut ! videoconvert ! video/x-raw,width=320,height=240 ! ximagesink
|
||
* ]|
|
||
* Another example launch line
|
||
* |[
|
||
* 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
|
||
* ]|
|
||
*/
|
||
|
||
#ifdef HAVE_CONFIG_H
|
||
#include <config.h>
|
||
#endif
|
||
|
||
#include "gstgrabcut.h"
|
||
#include <opencv2/imgproc.hpp>
|
||
|
||
GST_DEBUG_CATEGORY_STATIC (gst_grabcut_debug);
|
||
#define GST_CAT_DEFAULT gst_grabcut_debug
|
||
|
||
using namespace cv;
|
||
/* Filter signals and args */
|
||
enum
|
||
{
|
||
/* FILL ME */
|
||
LAST_SIGNAL
|
||
};
|
||
|
||
enum
|
||
{
|
||
PROP_0,
|
||
PROP_TEST_MODE,
|
||
PROP_SCALE
|
||
};
|
||
|
||
#define DEFAULT_TEST_MODE FALSE
|
||
#define DEFAULT_SCALE 1.6
|
||
|
||
G_DEFINE_TYPE (GstGrabcut, gst_grabcut, GST_TYPE_OPENCV_VIDEO_FILTER);
|
||
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
|
||
GST_PAD_SINK,
|
||
GST_PAD_ALWAYS,
|
||
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGBA")));
|
||
|
||
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
|
||
GST_PAD_SRC,
|
||
GST_PAD_ALWAYS,
|
||
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGBA")));
|
||
|
||
|
||
static void gst_grabcut_set_property (GObject * object, guint prop_id,
|
||
const GValue * value, GParamSpec * pspec);
|
||
static void gst_grabcut_get_property (GObject * object, guint prop_id,
|
||
GValue * value, GParamSpec * pspec);
|
||
|
||
static GstFlowReturn gst_grabcut_transform_ip (GstOpencvVideoFilter * filter,
|
||
GstBuffer * buf, Mat img);
|
||
static gboolean gst_grabcut_set_caps (GstOpencvVideoFilter * filter,
|
||
gint in_width, gint in_height, int in_cv_type,
|
||
gint out_width, gint out_height, int out_cv_type);
|
||
|
||
//static void gst_grabcut_release_all_pointers (GstGrabcut * filter);
|
||
|
||
static void compose_matrix_from_image (Mat output, Mat input);
|
||
|
||
static int run_grabcut_iteration (Mat image_c, Mat mask_c, Mat bgdModel,
|
||
Mat fgdModel);
|
||
static int run_grabcut_iteration2 (Mat image_c, Mat mask_c, Mat bgdModel,
|
||
Mat fgdModel, Rect bbox);
|
||
|
||
/* Clean up */
|
||
static void
|
||
gst_grabcut_finalize (GObject * obj)
|
||
{
|
||
GstGrabcut *filter = GST_GRABCUT (obj);
|
||
|
||
filter->cvRGBin.release ();
|
||
filter->cvA.release ();
|
||
filter->cvB.release ();
|
||
filter->cvC.release ();
|
||
filter->cvD.release ();
|
||
filter->grabcut_mask.release ();
|
||
filter->bgdModel.release ();
|
||
filter->fgdModel.release ();
|
||
|
||
G_OBJECT_CLASS (gst_grabcut_parent_class)->finalize (obj);
|
||
}
|
||
|
||
/* initialize the grabcut's class */
|
||
static void
|
||
gst_grabcut_class_init (GstGrabcutClass * klass)
|
||
{
|
||
GObjectClass *gobject_class = (GObjectClass *) klass;
|
||
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
||
GstOpencvVideoFilterClass *cvbasefilter_class =
|
||
(GstOpencvVideoFilterClass *) klass;
|
||
GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
|
||
|
||
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_grabcut_finalize);
|
||
gobject_class->set_property = gst_grabcut_set_property;
|
||
gobject_class->get_property = gst_grabcut_get_property;
|
||
|
||
btrans_class->passthrough_on_same_caps = TRUE;
|
||
|
||
cvbasefilter_class->cv_trans_ip_func = gst_grabcut_transform_ip;
|
||
cvbasefilter_class->cv_set_caps = gst_grabcut_set_caps;
|
||
|
||
g_object_class_install_property (gobject_class, PROP_TEST_MODE,
|
||
g_param_spec_boolean ("test-mode", "test-mode",
|
||
"If true, the output RGB is overwritten with the segmented foreground. Alpha channel same as normal case ",
|
||
DEFAULT_TEST_MODE, (GParamFlags)
|
||
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
||
|
||
g_object_class_install_property (gobject_class, PROP_SCALE,
|
||
g_param_spec_float ("scale", "scale",
|
||
"Grow factor for the face bounding box, if present", 1.0,
|
||
4.0, DEFAULT_SCALE,
|
||
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
||
|
||
gst_element_class_set_static_metadata (element_class,
|
||
"Grabcut-based image FG/BG segmentation", "Filter/Effect/Video",
|
||
"Runs Grabcut algorithm on input alpha. Values: BG=0, FG=1, PR_BG=2, PR_FGD=3; \
|
||
NOTE: larger values of alpha (notably 255) are interpreted as PR_FGD too. \n\
|
||
IN CASE OF no alpha mask input (all 0's or all 1's), the 'face' \
|
||
downstream event is used to create a bbox of PR_FG elements.\n\
|
||
IF nothing is present, then nothing is done.", "Miguel Casas-Sanchez <miguelecasassanchez@gmail.com>");
|
||
|
||
gst_element_class_add_static_pad_template (element_class, &src_factory);
|
||
gst_element_class_add_static_pad_template (element_class, &sink_factory);
|
||
}
|
||
|
||
|
||
/* initialize the new element
|
||
* instantiate pads and add them to element
|
||
* set pad callback functions
|
||
* initialize instance structure
|
||
*/
|
||
static void
|
||
gst_grabcut_init (GstGrabcut * filter)
|
||
{
|
||
filter->test_mode = DEFAULT_TEST_MODE;
|
||
filter->scale = DEFAULT_SCALE;
|
||
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER (filter), TRUE);
|
||
}
|
||
|
||
|
||
static void
|
||
gst_grabcut_set_property (GObject * object, guint prop_id,
|
||
const GValue * value, GParamSpec * pspec)
|
||
{
|
||
GstGrabcut *grabcut = GST_GRABCUT (object);
|
||
|
||
switch (prop_id) {
|
||
case PROP_TEST_MODE:
|
||
grabcut->test_mode = g_value_get_boolean (value);
|
||
break;
|
||
case PROP_SCALE:
|
||
grabcut->scale = g_value_get_float (value);
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gst_grabcut_get_property (GObject * object, guint prop_id,
|
||
GValue * value, GParamSpec * pspec)
|
||
{
|
||
GstGrabcut *filter = GST_GRABCUT (object);
|
||
|
||
switch (prop_id) {
|
||
case PROP_TEST_MODE:
|
||
g_value_set_boolean (value, filter->test_mode);
|
||
break;
|
||
case PROP_SCALE:
|
||
g_value_set_float (value, filter->scale);
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* GstElement vmethod implementations */
|
||
/* this function handles the link with other elements */
|
||
static gboolean
|
||
gst_grabcut_set_caps (GstOpencvVideoFilter * filter, gint in_width,
|
||
gint in_height, int in_cv_type, gint out_width,
|
||
gint out_height, int out_cv_type)
|
||
{
|
||
GstGrabcut *grabcut = GST_GRABCUT (filter);
|
||
Size size;
|
||
|
||
size = Size (in_width, in_height);
|
||
|
||
|
||
grabcut->cvRGBin.create (size, CV_8UC3);
|
||
|
||
grabcut->cvA.create (size, CV_8UC1);
|
||
grabcut->cvB.create (size, CV_8UC1);
|
||
grabcut->cvC.create (size, CV_8UC1);
|
||
grabcut->cvD.create (size, CV_8UC1);
|
||
|
||
grabcut->grabcut_mask = Mat::zeros (size, CV_8UC1);
|
||
grabcut->bgdModel = Mat ();
|
||
grabcut->fgdModel = Mat ();
|
||
//initialise_grabcut (&(grabcut->GC), grabcut->cvRGBin, grabcut->grabcut_mask);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static GstFlowReturn
|
||
gst_grabcut_transform_ip (GstOpencvVideoFilter * filter, GstBuffer * buffer,
|
||
Mat img)
|
||
{
|
||
GstGrabcut *gc = GST_GRABCUT (filter);
|
||
gint alphapixels;
|
||
std::vector < Mat > channels (4);
|
||
|
||
GstVideoRegionOfInterestMeta *meta;
|
||
meta = gst_buffer_get_video_region_of_interest_meta (buffer);
|
||
if (meta) {
|
||
gc->facepos.x = (meta->x) - ((gc->scale - 1) * meta->w / 2);
|
||
gc->facepos.y = (meta->y) - ((gc->scale - 1) * meta->h / 2);
|
||
gc->facepos.width = meta->w * gc->scale * 0.9;
|
||
gc->facepos.height = meta->h * gc->scale * 1.1;
|
||
} else {
|
||
memset (static_cast < void *>(&(gc->facepos)), 0, sizeof (gc->facepos));
|
||
}
|
||
|
||
/* normally input should be RGBA */
|
||
split (img, channels);
|
||
gc->cvA = channels.at (0);
|
||
gc->cvB = channels.at (1);
|
||
gc->cvC = channels.at (2);
|
||
gc->cvD = channels.at (3);
|
||
cvtColor (img, gc->cvRGBin, COLOR_BGRA2BGR);
|
||
compose_matrix_from_image (gc->grabcut_mask, gc->cvD);
|
||
|
||
/* Pass cvD to grabcut_mask for the graphcut stuff but that only if
|
||
really there is something in the mask! otherwise -->input bbox is
|
||
what we use */
|
||
alphapixels = countNonZero (gc->cvD);
|
||
if ((0 < alphapixels) && (alphapixels < (gc->width * gc->height))) {
|
||
GST_INFO ("running on mask");
|
||
run_grabcut_iteration (gc->cvRGBin, gc->grabcut_mask, gc->bgdModel,
|
||
gc->fgdModel);
|
||
} else {
|
||
if ((abs (gc->facepos.width) > 2) && (abs (gc->facepos.height) > 2)) {
|
||
GST_INFO ("running on bbox (%d,%d),(%d,%d)", gc->facepos.x, gc->facepos.y,
|
||
gc->facepos.width, gc->facepos.height);
|
||
run_grabcut_iteration2 (gc->cvRGBin, gc->grabcut_mask, gc->bgdModel,
|
||
gc->fgdModel, gc->facepos);
|
||
} else {
|
||
GST_WARNING ("No face info present, skipping frame.");
|
||
return GST_FLOW_OK;
|
||
}
|
||
}
|
||
|
||
/* if we want to display, just overwrite the output */
|
||
if (gc->test_mode) {
|
||
/* get only FG, PR_FG */
|
||
bitwise_and (gc->grabcut_mask, Scalar (1), gc->grabcut_mask);
|
||
/* (saturated) FG, PR_FG --> 255 */
|
||
gc->grabcut_mask.convertTo (gc->grabcut_mask, -1, 255.0, 0.0);
|
||
|
||
bitwise_and (gc->grabcut_mask, gc->cvA, gc->cvA);
|
||
bitwise_and (gc->grabcut_mask, gc->cvB, gc->cvB);
|
||
bitwise_and (gc->grabcut_mask, gc->cvC, gc->cvC);
|
||
}
|
||
|
||
merge (channels, img);
|
||
|
||
if (gc->test_mode) {
|
||
rectangle (img,
|
||
Point (gc->facepos.x, gc->facepos.y),
|
||
Point (gc->facepos.x + gc->facepos.width,
|
||
gc->facepos.y + gc->facepos.height), CV_RGB (255, 0, 255), 1, 8, 0);
|
||
}
|
||
|
||
return GST_FLOW_OK;
|
||
}
|
||
|
||
/* entry point to initialize the plug-in
|
||
* initialize the plug-in itself
|
||
* register the element factories and other features
|
||
*/
|
||
gboolean
|
||
gst_grabcut_plugin_init (GstPlugin * plugin)
|
||
{
|
||
/* debug category for fltering log messages
|
||
*
|
||
*/
|
||
GST_DEBUG_CATEGORY_INIT (gst_grabcut_debug, "grabcut",
|
||
0,
|
||
"Grabcut image segmentation on either input alpha or input bounding box");
|
||
|
||
return gst_element_register (plugin, "grabcut", GST_RANK_NONE,
|
||
GST_TYPE_GRABCUT);
|
||
}
|
||
|
||
void
|
||
compose_matrix_from_image (Mat output, Mat input)
|
||
{
|
||
|
||
int x, y;
|
||
for (x = 0; x < output.cols; x++) {
|
||
for (y = 0; y < output.rows; y++) {
|
||
output.data[output.step[0] * y + x] =
|
||
(input.data[input.step[0] * y + x] <=
|
||
GC_PR_FGD) ? input.data[input.step[0] * y + x] : GC_PR_FGD;
|
||
}
|
||
}
|
||
}
|
||
|
||
int
|
||
run_grabcut_iteration (Mat image_c, Mat mask_c, Mat bgdModel, Mat fgdModel)
|
||
{
|
||
if (countNonZero (mask_c))
|
||
grabCut (image_c, mask_c, Rect (),
|
||
bgdModel, bgdModel, 1, GC_INIT_WITH_MASK);
|
||
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
run_grabcut_iteration2 (Mat image_c, Mat mask_c, Mat bgdModel, Mat fgdModel,
|
||
Rect bbox)
|
||
{
|
||
grabCut (image_c, mask_c, bbox, bgdModel, fgdModel, 1, GC_INIT_WITH_RECT);
|
||
|
||
return (0);
|
||
}
|