private function calculateDimensions()
	{
		# calculate capatcha text box dimensions
		# which are the minimum image resource dimensions
	
		$this->_calculated_text_box['dimensions'] = $this->getTextBoxDimensions(
														$this->_background_text['size'],
														0,
														$this->_background_text['font'],
														$this->_code
														);

		# calculate how much each character takes from width
		$this->_calculated_text_box['char_width'] = $this->_calculated_text_box['dimensions']['width'] / $this->_code_length;

		# calculate additional width to add to the minimum text box width later
		$this->_calculated_text_box['additional_width'] = $this->_calculated_text_box['char_width'] * $this->_code_length + $this->_blocks_seperation;

		$this->_calculated_text_box['additional_height'] = rand( 5, 15 );	
		
		# set Initial Image Information width, height
		
		$this->_image_info['width']  = $this->_calculated_text_box['dimensions']['width']  + $this->_calculated_text_box['additional_width'];
			
		$this->_image_info['height'] = $this->_calculated_text_box['dimensions']['height'] + $this->_calculated_text_box['additional_height'];
		
		
		# Method End
	}