Class: Webcam::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/rb_webcam.rb

Overview

Property Container of image from webcam. Get size, color_depth, mode, etc.. of image. Each instance have IplImage struct data. TODO: Having pointer to IplImage struct will be good for performance?

(Does whole structure copying occur at Image.new(iplimage) ?)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(iplimage_struct) ⇒ Image

Returns a new instance of Image.



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# File 'lib/rb_webcam.rb', line 133

def initialize(iplimage_struct)
  @iplimage_struct = iplimage_struct
end

Instance Attribute Details

#iplimage_struct ⇒ Object (readonly)

IplImage structure stored grabbed image from camera.



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# File 'lib/rb_webcam.rb', line 163

def iplimage_struct
  @iplimage_struct
end

Instance Method Details

#color_depth ⇒ Object

get color depth of image.



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# File 'lib/rb_webcam.rb', line 143

def color_depth
  @iplimage_struct.depth
end

#data ⇒ Object

String of image data



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# File 'lib/rb_webcam.rb', line 148

def data
  self.data_pointer.read_string(self.data_size)
end

#data_pointer ⇒ Object

FFI::Pointer to image data



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# File 'lib/rb_webcam.rb', line 153

def data_pointer
  @iplimage_struct.image_data
end

#data_size ⇒ Object

data size of image



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# File 'lib/rb_webcam.rb', line 158

def data_size
  @iplimage_struct.image_size
end

#size ⇒ Object

get size of image. Hash with :width, :height elements.



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# File 'lib/rb_webcam.rb', line 138

def size
  {width: @iplimage_struct.width, height: @iplimage_struct.height}
end