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Optical ranging system and optical ranging method

A technology of optical distance measurement and distance measurement method, which is applied in the field of distance measurement system, and can solve problems such as insufficient exposure, inability to calculate the distance of a long-distance object to be measured, and reduced calculation accuracy of the optical distance measurement system.

Active Publication Date: 2016-06-08
PIXART IMAGING INC
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Problems solved by technology

[0003] However, when there are multiple UUTs with different distances in the space at the same time, the near-distance UUTs may have overexposure, while the far-distance UUTs may have underexposure. situation, the calculation accuracy of the optical ranging system may be reduced
In particular, when the exposure of the distant object under test is insufficient, there will be a problem that the object distance of the distant object cannot be calculated

Method used

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  • Optical ranging system and optical ranging method
  • Optical ranging system and optical ranging method
  • Optical ranging system and optical ranging method

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Embodiment Construction

[0038] Please refer to figure 1 As shown, it is a schematic block diagram of an optical ranging system according to an embodiment of the present invention. The optical ranging system 1 includes an image sensor 11 and a processing unit 13 . The image sensor 11 is preferably an active image sensor, such as a complementary metal-oxide-semiconductor (CMOS) image sensor, which can change the exposure time (exposure time) when acquiring the image F or use multiple exposures Different image regions of the image F are acquired at different times (examples are described in detail later).

[0039] The processing unit 13 can be, for example, a digital signal processor (DSP), a single chip (MCU), a central processing unit (CPU), etc., for receiving the image F output by the image sensor 11 for post-processing, And control the image acquisition of the image sensor 11 . In one embodiment, the processing unit 13 may include an exposure control unit 131, a multiplexing module 133, and a di...

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Abstract

The invention relates to an optical ranging system, which comprises an image sensor and a processing unit, wherein the processing unit generates an image to be calculated according to at least an image acquired by the image sensor, and different image areas of the image to be calculated are corresponding to different exposure times so as to increase the accuracy of the distance calculation.

Description

technical field [0001] The present invention relates to a ranging system, and more particularly to an optical ranging system and method using a multiplex exposure mechanism. Background technique [0002] Optical ranging systems calculate the distance to objects using triangulation methods. For example, an optical rangefinder system may include a light source as well as a camera. The light source projects light toward the object under test, and the camera receives reflected light from the object under test to form an image frame. When the spatial relationship between the light source and the camera is known, the distance of the object under test can be calculated according to the image position of the object in the image frame according to triangulation. [0003] However, when there are multiple UUTs with different distances in the space at the same time, the near-distance UUTs may have overexposure, while the far-distance UUTs may have underexposure. In this case, the cal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/00
Inventor 王国振
Owner PIXART IMAGING INC