Ranging device and ranging methhod
AssigneeGuangzhou Tyrafos Semiconductor Technologies Co., LTD
InventorsPing-Hung Yin, Jia-Shyang Wang
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Abstract
A ranging device and a ranging method are provided. The ranging device includes a light source, an image sensor, and a processor. The light source projects a plurality of projection patterns onto a surface of an object to be measured at different times. The image sensor senses the surface of the object to be measured in synchronization with projection times of the projection patterns to obtain a plurality of sensing images respectively corresponding to the projection patterns. The processor analyzes the sensing images to determine depth information of the object to be measured. The processor performs trigonometric calculations to obtain the depth information.
Claims16
A ranging device, comprising:
- a light source configured to project a plurality of projection patterns onto a surface of an object to be measured at different times;
- an image sensor configured to sense the surface in synchronization with projection times of the projection patterns of the object to be measured to obtain a plurality of sensing images respectively corresponding to the projection patterns;
- and
- a processor coupled to the light source and the image sensor and configured to analyze the sensing images to determine depth information of the object to be measured, wherein the processor performs a trigonometric calculation to obtain the depth information,
- wherein when a sequence of positions of the projection patterns in the sensing images does not conform to a projection sequence of the projection patterns, the processor determines the depth information by ignoring at least a part of the sensing images.
A ranging method, comprising:
- projecting a plurality of projection patterns onto a surface of an object to be measured at different times by a light source;
- sensing the surface of the object to be measured by an image sensor in synchronization with projection times of the projection patterns to obtain a plurality of sensing images respectively corresponding to the projection patterns;
- analyzing the sensing images to determine depth information of the object to be measured, wherein the depth information is generated by performing trigonometric calculations;
- and
- when a sequence of positions of the projection patterns in the sensing images does not conform to a projection sequence of the projection patterns, determining the depth information by ignoring at least a part of the sensing images.
Dependencies are inferred from the claim text.