Class: OpenCV::IplConvKernel

Inherits:
Object
  • Object
show all
Defined in:
ext/opencv/iplconvkernel.cpp,
ext/opencv/iplconvkernel.cpp

Overview

Structuring element can be used in the morphological operations.

CvMat#erode, CvMat#dilate, CvMat#morphology_open, CvMat#morphology_close, CvMat#morphology_gradient, CvMat#morphology_tophat, CvMat#morphology_blackhat

Create by IplConvKernel.new or CvMat#to_IplConvKernel

Instance Method Summary collapse

Constructor Details

#new(cols, rows, anchor_x, anchor_y, shape[,values = nil]) ⇒ Object

Creates structuring element.

cols
  Number of columns in the structuring element.
rows
  Number of rows in the structuring element.
anchor_x
  Relative horizontal offset of the anchor point.
anchor_y
  Relative vertical offset of the anchor point.
shape
  Shape of the structuring element; may have the following values:
   :rect
   :cross
   :ellipse
   :custom

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# File 'ext/opencv/iplconvkernel.cpp', line 59

VALUE
rb_initialize(int argc, VALUE *argv, VALUE self)
{
  VALUE shape, rows, cols, anchor_x, anchor_y, values;
  rb_scan_args(argc, argv, "51", &cols, &rows, &anchor_x, &anchor_y, &shape, &values);
  int shape_type;
  int _cols = NUM2INT(cols);
  int _rows = NUM2INT(rows);
  int num_values;
  int *_values = NULL;
  const int INVALID_SHAPE = -1;
  
  shape_type = CVMETHOD("STRUCTURING_ELEMENT_SHAPE", shape, INVALID_SHAPE);
  if (shape_type == INVALID_SHAPE)
    rb_raise(rb_eTypeError, "argument 1 (shape) should be :rect or :cross or :ellipse or :custom.");
  if (shape_type == CV_SHAPE_CUSTOM) {
    if (NIL_P(values))
      rb_raise(rb_eArgError, "argument 6 (values) should not be nil when the shape is :custom.");
    num_values = RARRAY_LEN(values);
    _values = ALLOCA_N(int, num_values);
    VALUE *values_ptr = RARRAY_PTR(values);
    for (int i = 0; i < num_values; ++i)
      _values[i] = NUM2INT(values_ptr[i]);
  }
  try {
    DATA_PTR(self) = rb_cvCreateStructuringElementEx(_cols, _rows, NUM2INT(anchor_x), NUM2INT(anchor_y),
						     shape_type, _values);
  }
  catch (cv::Exception& e) {
    raise_cverror(e);
  }
  return self;
}

Instance Method Details

#anchorObject

Return anchor of the structuring element.


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# File 'ext/opencv/iplconvkernel.cpp', line 136

VALUE
rb_anchor(VALUE self)
{
  IplConvKernel *kernel = IPLCONVKERNEL(self);
  return cCvPoint::new_object(cvPoint(kernel->anchorX, kernel->anchorY));
}

#anchor_xInteger

Return relative horizontal offset of the anchor point.

Returns:

  • (Integer)

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# File 'ext/opencv/iplconvkernel.cpp', line 149

VALUE
rb_anchor_x(VALUE self)
{
  return INT2NUM(IPLCONVKERNEL(self)->anchorX);
}

#anchor_yInteger

Return relative vertical offset of the anchor point.

Returns:

  • (Integer)

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# File 'ext/opencv/iplconvkernel.cpp', line 161

VALUE
rb_anchor_y(VALUE self)
{
  return INT2NUM(IPLCONVKERNEL(self)->anchorY);
}

#colsInteger Also known as: columns

Return number of columns in the structuring element.

Returns:

  • (Integer)

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# File 'ext/opencv/iplconvkernel.cpp', line 112

VALUE
rb_cols(VALUE self)
{
  return INT2NUM(IPLCONVKERNEL(self)->nCols);
}

#rowsInteger

Return number of rows in the structuring element.

Returns:

  • (Integer)

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# File 'ext/opencv/iplconvkernel.cpp', line 124

VALUE
rb_rows(VALUE self)
{
  return INT2NUM(IPLCONVKERNEL(self)->nRows);
}

#sizeObject

Return the structuring element's size.


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# File 'ext/opencv/iplconvkernel.cpp', line 99

VALUE
rb_size(VALUE self)
{
  IplConvKernel *kernel = IPLCONVKERNEL(self);
  return cCvSize::new_object(cvSize(kernel->nCols, kernel->nRows));
}