Patent ID: 7545972

Claim:
A test tube type discrimination apparatus comprising: a tube rack which holds test tubes arranged in a line, an opening of the tubes being held on top, the tube rack being conveyed in a direction corresponding to the line of the test tubes; a first electronic camera which is located above the tube rack and picks up a top view image of each of the test tubes held in the tube rack, a second electronic camera which is located at a side of the tube rack and picks up a side view image of each of the test tubes held in the tube rack, the first and second electronic cameras simultaneously picking up the top view image and the side view image; an extracting unit which receives the top view image picked up by the first electronic camera and the side view image picked up by the second electronic camera and extracts a top view image edge and a side view image edge to recognize a test tube pattern of each of the test tubes, the test tube pattern including opening and side patterns; a reference pattern memory which stores plural reference patterns each of which including a reference opening pattern and a reference side pattern of each of the test tubes of plural types; and a comparison determination unit which compares the opening pattern and the side pattern recognized by the extracting unit with the reference opening pattern and the reference side pattern of each of the test tubes included in the plural reference patterns stored in the reference pattern memory to determine a type of each of the test tubes held in the tube rack.