US Patent 7392755 Sewing machine capable of embroidery sewing

A sewing machine capable of embroidery sewing is configured to specify a type of embroidery frame by shooting an embroidery frame placed on an upper surface of the bed by a CCD or a CMOS image sensor disposed in an underside of an arm from an obliquely upward direction and obtaining an X-directional size and a Y-directional size of the embroidery frame, an embroiderable area size, and further a height-directional size of the embroidery frame by calculation based on image data shot by the image sensor.