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US 9,752,870 B2Granted
Information processing apparatus, control method thereof and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsTatsuya Suzuki, Tetsuri Sonoda
Life of this patent
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Abstract
An information processing apparatus for generating a projection pattern used in three-dimensional measurement of a target object, comprising: determination means for determining a projection code string for generating the projection pattern based on distance information of the target object which is obtained in advance; and generation means for generating a pattern image of the projection pattern based on a projection code string determined by the determination means.
Claims8
An information processing apparatus for generating a projection pattern used in three-dimensional measurement of a target object, the information processing apparatus comprising:
- an obtaining unit configured to obtain first distance information of the target object based on a first image obtained by capturing the target object onto which a first projection pattern is projected and to obtain second distance information of the target object based on a second image obtained by capturing the target object onto which a second projection pattern is projected, wherein the first projection pattern is generated based on a first projection code string and the second projection pattern is generated based on a second projection code string;
- a determination unit configured to determine a projection code string for generating a projection pattern to be projected based on the first distance information and the second distance information;
- a generation unit configured to generate a pattern image of the projection pattern to be projected based on a projection code string determined by the determination unit;
- an image capturing unit configured to capture the target object on which the pattern image is projected and to obtain an image;
- a pattern obtaining unit configured to extract a captured pattern from the image to obtain a captured code string;
- an association unit configured to collate the projection code string with the captured code string to perform association between the projection code string and the captured code string;
- and
- a measurement unit configured to measure distance information of the target object based on the association,
- wherein the determination unit determines the projection code string based on the difference between a distance value indicated by the first distance information and a distance value indicated by the second distance information.
6 more elements
A control method for an information processing apparatus for generating a projection pattern used in three-dimensional measurement of a target object, the control method comprising:
- a first obtaining step of obtaining first distance information of the target object based on a first image obtained by capturing the target object onto which a first projection pattern is projected, wherein the first projection pattern is generated based on a first projection code string;
- a second obtaining step of obtaining second distance information of the target object based on a second image obtained by capturing the target object onto which a second projection pattern is projected, wherein the second projection pattern is generated based on a second projection code string;
- a determination step of determining a projection code string for generating a projection pattern to be projected based on the first distance information and the second distance information;
- and
- a generation step of generating a pattern image of the projection pattern to be projected based on a projection code string determined in the determination step;
- an image capturing step of capturing the target object on which the pattern image is projected and obtaining an image;
- a pattern obtaining step of extracting a captured pattern from the image to obtain a captured code string;
- an association step of collating the projection code string with the captured code string to perform association between the projection code string and the captured code string;
- and
- a measurement step of measuring distance information of the target object based on the association,
- wherein the projection code string is determined based on the difference between a distance value indicated by the first distance information and a distance value indicated by the second distance information.
8 more elements
A non-transitory computer-readable storage medium storing a computer program to cause a computer to execute steps in a control method for an information processing apparatus for generating a projection pattern used in three-dimensional measurement of a target object, the control method comprising:
- a first obtaining step of obtaining first distance information of the target object based on a first image obtained by capturing the target object onto which a first projection pattern is projected, wherein the first projection pattern is generated based on a first projection code string;
- a second obtaining step of obtaining second distance information of the target object based on a second image obtained by capturing the target object onto which a second projection pattern is projected, wherein the second projection pattern is generated based on a second projection code string;
- a determination step of determining a projection code string for generating a projection pattern to be projected based on the first distance information and the second distance information;
- and
- a generation step of generating a pattern image of the projection pattern to be projected based on a projection code string determined in the determination step;
- an image capturing step of capturing the target object on which the pattern image is projected and obtaining an image;
- a pattern obtaining step of extracting a captured pattern from the image to obtain a captured code string;
- an association step of collating the projection code string with the captured code string to perform association between the projection code string and the captured code string;
- and
- a measurement step of measuring distance information of the target object based on the association,
- wherein the projection code string is determined based on the difference between a distance value indicated by the first distance information and a distance value indicated by the second distance information.
8 more elements
Dependencies are inferred from the claim text.