/* * GStreamer * Copyright (C) 2005 Thomas Vander Stichele * Copyright (C) 2005 Ronald S. Bultje * Copyright (C) 2008 Michael Sheldon * Copyright (C) 2009 Noam Lewis * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-templatematch * * Performs template matching on videos and images, providing detected positions via bus messages. * * * Example launch line * |[ * gst-launch-0.10 videotestsrc ! decodebin ! videoconvert ! templatematch template=/path/to/file.jpg ! videoconvert ! xvimagesink * ]| * */ #ifdef HAVE_CONFIG_H # include #endif #include #include "gstopencvutils.h" #include "gsttemplatematch.h" GST_DEBUG_CATEGORY_STATIC (gst_template_match_debug); #define GST_CAT_DEFAULT gst_template_match_debug #define DEFAULT_METHOD (3) /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, PROP_METHOD, PROP_TEMPLATE, PROP_DISPLAY, }; /* the capabilities of the inputs and outputs. */ static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB")) ); static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB")) ); G_DEFINE_TYPE (GstTemplateMatch, gst_template_match, GST_TYPE_ELEMENT); static void gst_template_match_finalize (GObject * object); static void gst_template_match_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_template_match_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_template_match_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstFlowReturn gst_template_match_chain (GstPad * pad, GstObject * parent, GstBuffer * buf); static void gst_template_match_load_template (GstTemplateMatch * filter); static void gst_template_match_match (IplImage * input, IplImage * template, IplImage * dist_image, double *best_res, CvPoint * best_pos, int method); /* initialize the templatematch's class */ static void gst_template_match_class_init (GstTemplateMatchClass * klass) { GObjectClass *gobject_class; GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gobject_class = (GObjectClass *) klass; gobject_class->finalize = gst_template_match_finalize; gobject_class->set_property = gst_template_match_set_property; gobject_class->get_property = gst_template_match_get_property; g_object_class_install_property (gobject_class, PROP_METHOD, g_param_spec_int ("method", "Method", "Specifies the way the template must be compared with image regions. 0=SQDIFF, 1=SQDIFF_NORMED, 2=CCOR, 3=CCOR_NORMED, 4=CCOEFF, 5=CCOEFF_NORMED.", 0, 5, DEFAULT_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_TEMPLATE, g_param_spec_string ("template", "Template", "Filename of template image", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_DISPLAY, g_param_spec_boolean ("display", "Display", "Sets whether the detected template should be highlighted in the output", TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_set_metadata (element_class, "templatematch", "Filter/Effect/Video", "Performs template matching on videos and images, providing detected positions via bus messages.", "Noam Lewis "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_factory)); } /* initialize the new element * instantiate pads and add them to element * set pad callback functions * initialize instance structure */ static void gst_template_match_init (GstTemplateMatch * filter) { filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); gst_pad_set_event_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_template_match_handle_sink_event)); gst_pad_set_chain_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_template_match_chain)); filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); filter->template = NULL; filter->display = TRUE; filter->cvTemplateImage = NULL; filter->cvDistImage = NULL; filter->cvImage = NULL; filter->method = DEFAULT_METHOD; gst_template_match_load_template (filter); } static void gst_template_match_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTemplateMatch *filter = GST_TEMPLATE_MATCH (object); switch (prop_id) { case PROP_METHOD: switch (g_value_get_int (value)) { case 0: filter->method = CV_TM_SQDIFF; break; case 1: filter->method = CV_TM_SQDIFF_NORMED; break; case 2: filter->method = CV_TM_CCORR; break; case 3: filter->method = CV_TM_CCORR_NORMED; break; case 4: filter->method = CV_TM_CCOEFF; break; case 5: filter->method = CV_TM_CCOEFF_NORMED; break; } break; case PROP_TEMPLATE: filter->template = (char *) g_value_get_string (value); gst_template_match_load_template (filter); break; case PROP_DISPLAY: filter->display = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_template_match_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTemplateMatch *filter = GST_TEMPLATE_MATCH (object); switch (prop_id) { case PROP_METHOD: g_value_set_int (value, filter->method); break; case PROP_TEMPLATE: g_value_set_string (value, filter->template); break; case PROP_DISPLAY: g_value_set_boolean (value, filter->display); 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_template_match_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstTemplateMatch *filter; GstVideoInfo info; gboolean res = TRUE; filter = GST_TEMPLATE_MATCH (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); gst_video_info_from_caps (&info, caps); filter->cvImage = cvCreateImageHeader (cvSize (info.width, info.height), IPL_DEPTH_8U, 3); break; } default: break; } res = gst_pad_event_default (pad, parent, event); return res; } static void gst_template_match_finalize (GObject * object) { GstTemplateMatch *filter; filter = GST_TEMPLATE_MATCH (object); if (filter->cvImage) { cvReleaseImageHeader (&filter->cvImage); } if (filter->cvDistImage) { cvReleaseImage (&filter->cvDistImage); } if (filter->cvTemplateImage) { cvReleaseImage (&filter->cvTemplateImage); } G_OBJECT_CLASS (gst_template_match_parent_class)->finalize (object); } /* chain function * this function does the actual processing */ static GstFlowReturn gst_template_match_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstTemplateMatch *filter; CvPoint best_pos; double best_res; GstMapInfo info; filter = GST_TEMPLATE_MATCH (parent); /* FIXME Why template == NULL returns OK? * shouldn't it be a passthrough instead? */ if ((!filter) || (!buf) || filter->template == NULL) { return GST_FLOW_OK; } GST_LOG_OBJECT (filter, "Buffer size %u", (guint) gst_buffer_get_size (buf)); buf = gst_buffer_make_writable (buf); gst_buffer_map (buf, &info, GST_MAP_READWRITE); filter->cvImage->imageData = (char *) info.data; if (!filter->cvDistImage) { if (filter->cvTemplateImage->width > filter->cvImage->width) { GST_WARNING ("Template Image is wider than input image"); } else if (filter->cvTemplateImage->height > filter->cvImage->height) { GST_WARNING ("Template Image is taller than input image"); } else { GST_DEBUG_OBJECT (filter, "cvCreateImage (Size(%d-%d+1,%d) %d, %d)", filter->cvImage->width, filter->cvTemplateImage->width, filter->cvImage->height - filter->cvTemplateImage->height + 1, IPL_DEPTH_32F, 1); filter->cvDistImage = cvCreateImage (cvSize (filter->cvImage->width - filter->cvTemplateImage->width + 1, filter->cvImage->height - filter->cvTemplateImage->height + 1), IPL_DEPTH_32F, 1); if (!filter->cvDistImage) { GST_WARNING ("Couldn't create dist image."); } } } if (filter->cvTemplateImage && filter->cvImage && filter->cvDistImage) { GstStructure *s; GstMessage *m; gst_template_match_match (filter->cvImage, filter->cvTemplateImage, filter->cvDistImage, &best_res, &best_pos, filter->method); s = gst_structure_new ("template_match", "x", G_TYPE_UINT, best_pos.x, "y", G_TYPE_UINT, best_pos.y, "width", G_TYPE_UINT, filter->cvTemplateImage->width, "height", G_TYPE_UINT, filter->cvTemplateImage->height, "result", G_TYPE_DOUBLE, best_res, NULL); m = gst_message_new_element (GST_OBJECT (filter), s); gst_element_post_message (GST_ELEMENT (filter), m); if (filter->display) { CvPoint corner = best_pos; buf = gst_buffer_make_writable (buf); corner.x += filter->cvTemplateImage->width; corner.y += filter->cvTemplateImage->height; cvRectangle (filter->cvImage, best_pos, corner, CV_RGB (255, 32, 32), 3, 8, 0); } } return gst_pad_push (filter->srcpad, buf); } static void gst_template_match_match (IplImage * input, IplImage * template, IplImage * dist_image, double *best_res, CvPoint * best_pos, int method) { double dist_min = 0, dist_max = 0; CvPoint min_pos, max_pos; cvMatchTemplate (input, template, dist_image, method); cvMinMaxLoc (dist_image, &dist_min, &dist_max, &min_pos, &max_pos, NULL); if ((CV_TM_SQDIFF_NORMED == method) || (CV_TM_SQDIFF == method)) { *best_res = dist_min; *best_pos = min_pos; if (CV_TM_SQDIFF_NORMED == method) { *best_res = 1 - *best_res; } } else { *best_res = dist_max; *best_pos = max_pos; } } static void gst_template_match_load_template (GstTemplateMatch * filter) { if (filter->template) { filter->cvTemplateImage = cvLoadImage (filter->template, CV_LOAD_IMAGE_COLOR); if (!filter->cvTemplateImage) { GST_WARNING ("Couldn't load template image: %s. error: %s", filter->template, g_strerror (errno)); } } } /* entry point to initialize the plug-in * initialize the plug-in itself * register the element factories and other features */ gboolean gst_template_match_plugin_init (GstPlugin * templatematch) { /* debug category for fltering log messages */ GST_DEBUG_CATEGORY_INIT (gst_template_match_debug, "templatematch", 0, "Performs template matching on videos and images, providing detected positions via bus messages"); return gst_element_register (templatematch, "templatematch", GST_RANK_NONE, GST_TYPE_TEMPLATE_MATCH); }