Portable three-dimensional image measuring device, three-dimensional image measuring method using same, and medical image matching system

A portable three-dimensional image measuring device comprising:

• a light source configured to output patterned light;
• a camera configured to generate an image of an object by receiving reflected light generated by reflecting the patterned light from the object;
• an optical path control element configured to reflect the patterned light output from the light source so that the object is irradiated with the patterned light, and to transmit the reflected light reflected from the object so that the reflected light reaches the camera;
• and
• a processor,
• wherein an optical path of the patterned light output from the light source and irradiated onto the object and an optical path of the reflected light reflected from the object and reaching the camera overlap coaxially in a section between the optical path control element and the object, and
• wherein the processor is configured to:
• measure a light intensity of reflected light at each of a plurality of points constituting a surface of the object using the image of the object acquired through the camera;
• generate phase data based on the measured light intensity;
• and
• generate a three-dimensional image of the surface of the object by calculating a height of each of the plurality of points based on the generated phase data.