Measurement system, information processing apparatus, information processing method, and medium
AssigneeCanon Kabushiki Kaisha
InventorTakuya Shimada
Life of this patent
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Abstract
A measurement apparatus includes an illumination unit configured to illuminate a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another, an imaging unit configured to image the measurement object illuminated based on the illumination images, a first calculation unit configured to calculate phase information of a change in a luminance value at each of pixels based on a plurality of images captured by the imaging unit, and a first acquisition unit configured to acquire, from the phase information, a maximum reflection direction where a reflection direction is maximized on the measurement object.
Claims23
A measurement apparatus comprising:
- an illumination unit configured to illuminate a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another;
- an imaging unit configured to image the measurement object illuminated based on the illumination images;
- a first calculation unit configured to calculate phase information of a change in a luminance value at each pixel based on a plurality of images captured by the imaging unit;
- and
- a first acquisition unit configured to acquire, from the phase information, a maximum reflection direction where a reflection direction is maximized on the measurement object.
A non-transitory computer-readable storage medium storing a program that causes a computer to perform a method comprising:
- illuminating a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another;
- imaging the measurement object illuminated based on the illumination images;
- calculating phase information of a change in a luminance value at each of pixels based on a plurality of images captured in the imaging;
- and
- acquiring, from the phase information, a two-dimensional distribution of an optical normal direction according to a maximum reflection direction where a reflection direction is maximized on the measurement object.
A measurement method comprising:
- illuminating a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another;
- imaging the measurement object illuminated based on the illumination images;
- calculating phase information of a change in a luminance value at each of pixels based on a plurality of images captured in the imaging;
- and
- acquiring, from the phase information, a two-dimensional distribution of an optical normal direction according to a maximum reflection direction where a reflection direction is maximized on the measurement object.
A measurement apparatus comprising:
- an illumination unit configured to illuminate a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated, according to periodic functions, out of phase with one another;
- an imaging unit configured to image the measurement object illuminated based on the illumination images;
- a first calculation unit configured to calculate amplitude information of a change in a luminance value at each of pixels based on a plurality of images captured by the imaging unit;
- and
- a first acquisition unit configured to acquire, from the amplitude information, a two-dimensional distribution of gloss image clarity of the measurement object.
A non-transitory computer-readable storage medium storing a program that causes a computer to perform a method comprising:
- illuminating a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another;
- imaging the measurement object illuminated based on the illumination images;
- calculating amplitude information of a change in a luminance value at each of pixels based on a plurality of images captured in the imaging;
- and
- acquiring, from the amplitude information, a two-dimensional distribution of gloss image clarity of the measurement object.
A measurement method comprising:
- illuminating a measurement object with use of a plurality of point light sources configured to emit light based on illumination images modulated according to periodic functions out of phase with one another;
- imaging the measurement object illuminated based on the illumination images;
- calculating amplitude information of a change in a luminance value at each of pixels based on a plurality of images captured in the imaging;
- and
- acquiring, from the amplitude information, a two-dimensional distribution of gloss image clarity of the measurement object.
Dependencies are inferred from the claim text.