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opencv: cvlaplace: add scale and shift properties

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Add scale and shift properties so these can be used to tweak the values
used in cvConvertScale() instead of using only defaults.
This commit is contained in:
Luis de Bethencourt 2015-09-29 13:52:47 +01:00
parent ff8f648f37
commit 6bc00355b8
2 changed files with 31 additions and 2 deletions
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31
ext/opencv/gstcvlaplace.c
View file

@ -83,10 +83,14 @@ enum
enum
{
PROP_0,
PROP_APERTURE_SIZE
PROP_APERTURE_SIZE,
PROP_SCALE,
PROP_SHIFT
};
#define DEFAULT_APERTURE_SIZE 3
#define DEFAULT_SCALE_FACTOR 1.0
#define DEFAULT_SHIFT 0.0
G_DEFINE_TYPE (GstCvLaplace, gst_cv_laplace, GST_TYPE_OPENCV_VIDEO_FILTER);
@ -143,6 +147,14 @@ gst_cv_laplace_class_init (GstCvLaplaceClass * klass)
g_param_spec_int ("aperture-size", "aperture size",
"Size of the extended Laplace Kernel (1, 3, 5 or 7)", 1, 7,
DEFAULT_APERTURE_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SCALE,
g_param_spec_double ("scale", "scale factor",
"Scale factor", 0.0, G_MAXDOUBLE,
DEFAULT_SCALE_FACTOR, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SHIFT,
g_param_spec_double ("shift", "Shift",
"Value added to the scaled source array elements", 0.0, G_MAXDOUBLE,
DEFAULT_SHIFT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
@ -160,6 +172,8 @@ static void
gst_cv_laplace_init (GstCvLaplace * filter)
{
filter->aperture_size = DEFAULT_APERTURE_SIZE;
filter->scale = DEFAULT_SCALE_FACTOR;
filter->shift = DEFAULT_SHIFT;
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), FALSE);
}
@ -277,6 +291,12 @@ gst_cv_laplace_set_property (GObject * object, guint prop_id,
filter->aperture_size = g_value_get_int (value);
}
break;
case PROP_SCALE:
filter->scale = g_value_get_double (value);
break;
case PROP_SHIFT:
filter->shift = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -293,6 +313,12 @@ gst_cv_laplace_get_property (GObject * object, guint prop_id,
case PROP_APERTURE_SIZE:
g_value_set_int (value, filter->aperture_size);
break;
case PROP_SCALE:
g_value_set_double (value, filter->scale);
break;
case PROP_SHIFT:
g_value_set_double (value, filter->shift);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -308,7 +334,8 @@ gst_cv_laplace_transform (GstOpencvVideoFilter * base, GstBuffer * buf,
g_assert (filter->intermediary_img);
cvLaplace (img, filter->intermediary_img, filter->aperture_size);
cvConvertScale (filter->intermediary_img, outimg, 1, 0);
cvConvertScale (filter->intermediary_img, outimg, filter->scale,
filter->shift);
return GST_FLOW_OK;
}

2
ext/opencv/gstcvlaplace.h
View file

@ -70,6 +70,8 @@ struct _GstCvLaplace
GstOpencvVideoFilter element;
gint aperture_size;
gdouble scale;
gdouble shift;
IplImage *intermediary_img;
};