Three-dimensional shape measuring apparatus

A three-dimensional shape measuring apparatus comprising:

• a light source that emits a laser beam;
• a projection part that generates pattern light having plural areas, intensity-modulated to ternary or higher representation values based on a pattern code, using the laser beam, and projects the pattern light onto an object;
• an image pickup part that performs image pickup on the light, reflected from the object by projection of the pattern light to simultaneously obtain a pattern image and a luminance image;
• an arithmetic part that calculates range information about a distance to the object based on the pattern code and the pattern image;
• and
• a three-dimensional image formation part that forms a three-dimensional image based on the range information obtained by calculation by the arithmetic part and luminance information obtained by the image pickup part.

A three-dimensional shape measuring apparatus comprising:

• a light source that emits a laser beam;
• a projection part that generates pattern light having plural areas, intensity-modulated to ternary or higher representation values based on a pattern code, using the laser beam, and projects the pattern light onto an object;
• a camera having a first and second image pickup part, and the camera receiving reflected light from the object and dividing the reflected light to the first and second image pickup part so that the first and second image pickup part obtains respectively a first and second pattern image;
• and
• an arithmetic part that modifies the pattern code based on the first pattern image, and calculates range information about a distance to the object based on the modified pattern code and the second pattern image.