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Optical distance measuring system enabling dynamic exposure time

A technology of exposure time and optical ranging, which is applied in the field of ranging systems and can solve problems such as insufficient exposure, inability to calculate the distance of objects to be measured at long distances, and reduced calculation accuracy of the optical ranging system.

Active Publication Date: 2016-08-17
PIXART IMAGING INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 over exposure, while the far-distance UUTs may have underexposure. ), the calculation accuracy of the optical ranging system may be reduced
In particular, when the exposure of the distant DUT is underexposed, there will be a problem that the object distance of the far DUT cannot be calculated

Method used

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  • Optical distance measuring system enabling dynamic exposure time
  • Optical distance measuring system enabling dynamic exposure time
  • Optical distance measuring system enabling dynamic exposure time

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Embodiment Construction

[0021] Such as figure 1 As shown, it is a 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, but is not limited thereto, and it can change the exposure time (exposure time) when the image F is acquired (for example, it will be described in detail later. ).

[0022] The processing unit 13 can be, for example, a digital signal processor (DSP), a single-chip microcomputer (MCU), a central processing unit (CPU), an application-specific integrated circuit (ASIC), etc., for receiving the image F outputted by the image sensor 11. to perform subsequent processing, and to control the image acquisition of the image sensor 11 . In some embodiments, the processing unit 13 may include an exposure control unit 131, a multiplexing modu...

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Abstract

The invention discloses an optical distance measuring system. The optical distance measuring system comprises an image sensor and a processing unit; and the processing unit generates an image to be calculated according to at least one image obtained by the image sensor, wherein different image regions of the image to be calculated are corresponding to different exposure time. With the optical distance measuring system adopted, the accuracy of distance calculation can be increased.

Description

technical field [0001] The invention relates to a ranging system, in particular to an optical ranging system with dynamic exposure time. 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 position of the object image 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 over exposure, while the far-distance UUTs may have underexposure. ), the calculation accuracy of the optical distance measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
Inventor 王国振周效瑜
Owner PIXART IMAGING INC