WO2019041116A1 - 光学测距方法以及光学测距装置 - Google Patents
光学测距方法以及光学测距装置 Download PDFInfo
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- WO2019041116A1 WO2019041116A1 PCT/CN2017/099408 CN2017099408W WO2019041116A1 WO 2019041116 A1 WO2019041116 A1 WO 2019041116A1 CN 2017099408 W CN2017099408 W CN 2017099408W WO 2019041116 A1 WO2019041116 A1 WO 2019041116A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2513—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object with several lines being projected in more than one direction, e.g. grids, patterns
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
- G01S17/894—3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4865—Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
Definitions
- the present invention relates to an optical ranging method and an optical ranging device, and more particularly to an optical ranging method and an optical ranging device that are mutually correctable.
- the optical ranging device can acquire its distance/depth information with respect to the target using a 3D image sensing system, and thus generate three-dimensional image data by the pitch value or distance value of each pixel of the 3D image, which is also referred to as a distance.
- Image or depth map can be used in a variety of applications to get more information about objects in the scene captured by the camera, solving different tasks in the field of industrial sensors.
- a 3D image sensing system emits incident light through a light emitting diode and utilizes a plurality of pixel circuits in the pixel array to acquire reflected light corresponding to the incident light.
- the prior art has developed a method for measuring the distance according to the time-of-flight (ToF) between the modulated incident light and the reflected light.
- the advantage of using the modulated light for the time-of-flight ranging is that the background light is resistant. Good interference and poor accuracy.
- the prior art has developed the use of structured light and triangulation to measure distance, which has better accuracy, but its ability to resist background light interference is poor.
- the triangulation method needs to correct some parameters when calculating the distance, and the flying time measurement distance has the time-of-flight error. When the parameters required by the triangulation method and the time-of-flight error are unknown, Existing optical ranging devices cannot accurately provide distance/depth information of the target.
- the present invention provides an optical ranging method, which is applied to an optical ranging device, the optical ranging device comprising a light emitting module and a photosensitive module, wherein the light emitting module emits incident light, and the photosensitive module Receiving reflected light reflected from the object reflection point and generating an image, the correction method comprising determining an expression of a first measurement distance according to the plurality of first parameters; according to the incident light and the reflected light Calculating a time-of-flight measurement distance according to the flight time; calculating an optimal value of the plurality of first parameters and corresponding to the time-of-flight measurement distance according to the expression of the first measurement distance and the flying time measurement distance An optimal value of the time-of-flight error; and obtaining the optical ranging device from the measured distance according to the time of flight, the optimal value of the plurality of first parameters, and the optimal value of the time-of-flight error Image depth information of the object reflection point; wherein the plurality of first parameters include a first angle,
- the step of determining the first measurement distance according to the plurality of first parameters comprises: determining coordinates of the object reflection point relative to the photosensitive module according to the plurality of first parameters; according to the coordinates, Determining an expression of a return distance of the object reflection point with respect to the photosensitive module and an expression of a distance of the object reflection point with respect to the light-emitting module; and an expression of the first measurement distance is The sum of the expression of the return distance and the expression of the forward distance.
- calculating an optimal value of the plurality of first parameters and a time-of-flight error corresponding to the measured time of the flying time according to the expression of the first measured distance and the measured time of the flying time includes: formulating an objective function according to the expression of the first measured distance and the measured time of the flying time; And calculating an optimal value of the plurality of first parameters and an optimal value of the time-of-flight error corresponding to the time-of-flight measurement distance according to the objective function.
- the objective function is an absolute value of the expression of the first measured distance and the flying time measuring distance and the flying time error.
- the step of calculating an optimal value of the plurality of first parameters and an optimal value of the time-of-flight error corresponding to the time-of-flight measurement distance according to the objective function comprises: using a Gauss-Newton algorithm, according to the target a function calculates an optimal value of the plurality of first parameters and an optimal value of a time-of-flight error corresponding to the time-of-flight measurement distance.
- the incident light includes structured light
- the determining, according to the plurality of first parameters, the expression of the first measured distance comprises determining according to the reflected light corresponding to the structured light and the plurality of first parameters.
- the incident light includes modulated light
- calculating a time-of-flight measurement distance according to a time of flight between the incident light and the reflected light comprises: according to the reflected light corresponding to the modulated light and Flight time, calculate the time measurement distance.
- the invention further provides an optical distance measuring device, comprising: a light emitting module for emitting incident light; a photosensitive module for receiving reflected light reflected from a reflection point of the object, and generating an image; and a calculation module coupled to the a photosensitive module, the calculation module includes: a structured photon module, configured to determine an expression of the first measured distance according to the plurality of first parameters; and a modulated photon module for using the incident light and the reflected light Calculating the time-of-flight measurement distance; the optimal calculation sub-module is configured to calculate an optimal value of the plurality of first parameters according to the expression of the first measurement distance and the time-of-flight measurement distance And an optimal value of a time-of-flight error corresponding to the time-of-flight measurement distance; and an acquisition sub-module for measuring a distance according to the time of flight, an optimal value of the plurality of first parameters, and the flying And obtaining an image depth information of the optical ranging device relative to the object reflection point; wherein the plurality of first
- the invention combines the measurement distance of the triangulation method and the measurement distance of the time-of-flight distance measurement method into one, and uses the measurement distance of the time-of-flight distance measurement method to correct the parameters required by the triangulation method, and uses the amount of the triangulation method.
- the distance is measured to correct the time-of-flight error of the time-of-flight ranging method to solve the shortcomings in the prior art.
- FIG. 1 is a schematic view of an optical distance measuring device according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of a process according to an embodiment of the present invention.
- Figure 3 is a schematic diagram of a three-dimensional space coordinate.
- FIG. 4 is a schematic diagram of a process according to an embodiment of the present invention.
- FIG. 1 is a schematic diagram of an optical ranging device 10 according to an embodiment of the present invention.
- the optical distance measuring device 10 includes a light emitting module 12, a light sensing module 14, and a calculation module 16.
- the light emitting module 12 can include a light emitting diode (LED) for emitting incident light, and the light emitting diode can be an infrared light emitting diode.
- the photosensitive module 14 may be an imaging unit, which may include a lens (Lens) and an image sensor (Image Sensor) for receiving reflected light reflected from the object reflection point OBJ and generating an image.
- the computing module 16 can include a structural photonic module, a modulated photonic module, an optimal computing sub-module, and an obtaining sub-module.
- the computing module 16 can include a processing unit and a storage unit, which can be an application processor ( Application Process, AP) or digital signal A digital signal processor (DSP) can store program code for instructing the processing unit to execute a flow to calculate image depth information of the optical ranging device 10 with respect to the object reflection point OBJ.
- AP Application Process
- DSP digital signal processor
- the incident light emitted by the light-emitting module 12 is Modulated and Structured Light, that is, the incident light has the characteristics of Structured Light and Modulated Light.
- the incident light since the incident light has the characteristic of structured light, the incident light may have a light-dark distribution such as a stripe spatially; since the incident light has the characteristic of modulated light, the incident light may follow
- the modulation signal input to the light module 12 exhibits a light and dark change in time (Temporally). Other details regarding structured light and modulated light characteristics are known to those of ordinary skill in the art and will not be described again.
- the photosensitive module 14 and the calculation module 16 can calculate the first measurement distance D1 by using the characteristics of the structured light and the triangulation method; using the characteristics of the modulated light, and according to the flight time between the incident light and the reflected light (Time of Flight, ToF), calculate the time-of-flight measurement distance D ToF .
- the calculation module 16 when calculating the first measurement distance D1 by using the characteristics of the structured light and the triangulation method, the calculation module 16 needs to know the parameters ⁇ , ⁇ , b in advance, where ⁇ is the target reflection point OBJ relative to The elevation angle of the light-emitting module 12 and the light-sensing module 14, ⁇ is the azimuth angle of the object reflection point OBJ with respect to the light-emitting module 12 and the light-sensing module 14, and b is between the light-emitting module 12 and the light-sensing module 14. distance.
- the parameters ⁇ , ⁇ , and b need to be known in advance, and the calculation module 16 has a way to calculate the first measurement distance D1 by using the triangulation method. That is, when the calculation module 16 calculates the first measurement distance D1 using the structured light characteristics and the triangulation method, the parameters ⁇ , ⁇ , b are unknown to the calculation module 16. On the other hand, the calculation module 16 uses the time-of-flight measurement distance D ToF calculated by the flight time to have a time-of-flight error ⁇ ToF , and the time-of-flight error ⁇ ToF is also unknown to the calculation module 16 .
- the parameters ⁇ , ⁇ , b and the time-of-flight error ⁇ ToF have an uncertainty (Uncertainty) for the calculation module 16, and the first measurement distance D1 and the fly-time measurement distance D ToF cannot be accurately Represents the image depth information of the optical ranging device 10 with respect to the object reflection point OBJ.
- the calculation module corrects the parameters ⁇ , ⁇ , b in the case where the distance between the optical distance measuring device and the object reflection point is known. In other words, the user needs to place the object reflection point. In the case of a known distance from the optical distance measuring device, the calculation module corrects the parameters ⁇ , ⁇ , b, and the prior art brings operational inconvenience.
- the present invention utilizes the mutual measurement triangulation method and the time-of-flight distance measurement method, specifically, The present invention utilizes the time-of-flight measurement distance D ToF to correct the parameters ⁇ , ⁇ , b required by the calculation module 16 for calculating the first measurement distance D1 by using the triangulation method, and correcting by using the first measurement distance D1.
- the present invention utilizes the time-of-flight measurement distance D ToF to correct the parameters ⁇ , ⁇ , b required by the calculation module 16 for calculating the first measurement distance D1 by using the triangulation method, and correcting by using the first measurement distance D1.
- FIG. 2 is a schematic diagram of a process 20 according to an embodiment of the present invention.
- the process 20 can be compiled into program code and stored in a storage unit, and the process 20 can be executed by the calculation module 16. As shown in FIG. 2, the process 20 includes the following steps:
- Step 202 Determine an expression corresponding to the first measurement distance D1( ⁇ , ⁇ , b) of the parameters ⁇ , ⁇ , b according to the parameters ⁇ , ⁇ , b.
- Step 204 Calculate a time-of-flight measurement distance D ToF corresponding to the flight time according to a flight time between the incident light and the reflected light.
- Step 208 Calculate an optimal value of the parameters ⁇ , ⁇ , b and an optimal value of the flight time error ⁇ ToF according to the objective function r( ⁇ , ⁇ , b, ⁇ ToF ).
- Step 210 Calculate image depth information of the optical ranging device 10 with respect to the object reflection point OBJ according to the optimal values of the flying time measurement distance D ToF , the parameters ⁇ , ⁇ , b, and the flying time error ⁇ ToF .
- the structured photonic module of the calculation module 16 determines an expression corresponding to the first measurement distance D1( ⁇ , ⁇ , b) of the parameters ⁇ , ⁇ , b according to the parameters ⁇ , ⁇ , b.
- the calculation module 16 may first obtain the image coordinate (x 0 , y 0 ) of the object reflection point OBJ in the image, and obtain the object according to the image coordinates (x 0 , y 0 ) and the parameters ⁇ , ⁇ , b.
- the coordinates (X 0 , Y 0 , Z 0 ) of the reflection point OBJ with respect to the photosensitive module 14 and the outward distance of the object reflection point OBJ with respect to the light-emitting module 12 are determined according to the coordinates (X 0 , Y 0 , Z 0 ).
- the expression and the expression of the return distance of the object reflection point OBJ with respect to the photosensitive module 14, the expression of the first measurement distance D1 ( ⁇ , ⁇ , b) is the sum of the forward distance and the return distance.
- the calculation module 16 can determine the coordinates (X 0 , Y 0 , Z 0 ) of the object reflection point OBJ relative to the photosensitive module 14 according to the image coordinates (x 0 , y 0 ) and the parameters ⁇ , ⁇ , b. 4, and according to the coordinates (X 0 , Y 0 , Z 0 ) determined by the formula 4, determine the travel distance is And determine the return distance is Accordingly, the calculation module 16 can determine that the first measurement distance D1 ( ⁇ , ⁇ , b) is
- FIG. 3 is a schematic diagram of three-dimensional space coordinates of the object reflection point OBJ, the light-emitting module 12, and the photosensitive module 14.
- the coordinate points O, P, and P 0 respectively represent the coordinates of the photosensitive module 14, the object reflection point OBJ, and the light-emitting module 12 in three-dimensional space, and it is assumed that the photosensitive module 14 is located at the coordinate origin O (ie, the photosensitive module 14/coordinate point).
- the coordinates of O are (0, 0, 0)), the coordinates of the object reflection point OBJ/coordinate point P are (X 0 , Y 0 , Z 0 ), and the coordinates of the light-emitting module 12 / coordinate point P 0 are (0, - b, 0).
- the focal length of the known lens is f
- the modulation photon module of the calculation module 16 in step 204 calculates the technical details of the time-of-flight measurement distance D ToF corresponding to the flight time based on the flight time between the incident light and the reflected light, which is known to those of ordinary skill in the art. Therefore, it will not be repeated here.
- the optimal calculation sub-module of the calculation module 16 formulates the objective function r( ⁇ , ⁇ , b, ⁇ ToF ) as
- the optimal calculation sub-module of the calculation module 16 calculates the optimal values of the parameters ⁇ , ⁇ , b and the optimal value of the flight time error ⁇ ToF according to the objective function r( ⁇ , ⁇ , b, ⁇ ToF ).
- the calculation module 16 may utilize a Recursive/Iterative algorithm to find the solution of Equation 6.
- the optimal calculation sub-module of the calculation module 16 can use the Gauss-Newton algorithm, the Gradient-Related algorithm, the Golden Search algorithm, etc. to obtain the solution of Equation 6.
- the best parameters ⁇ , ⁇ , b and the time-of-flight error ⁇ ToF are obtained .
- the Gauss Newton algorithm, the gradient correlation algorithm, and the gold search algorithm are known to those skilled in the art, and thus will not be described herein.
- Step 400 Start.
- Step 402 Obtain parameters ⁇ n , ⁇ n , b n and time-of-flight error ⁇ ToF,n .
- Step 404 Calculate the objective function r( ⁇ n , ⁇ n , b n , ⁇ ToF, n ) according to the parameters ⁇ n , ⁇ n , b n and the time-of-flight error ⁇ ToF,n .
- Step 406 Calculate the parameters ⁇ n+1 , ⁇ n+1 , b n+1 and the time-of-flight error ⁇ ToF,n+1 .
- Step 408 Determine whether convergence is achieved? If yes, go to step 412; if no, go to step 410.
- Step 412 End.
- the obtaining sub-module of the computing module 16 can be based on the parameters corresponding to the optimal parameters ⁇ , ⁇ , b. Or D ToF + ⁇ ToF corresponding to the optimal time-of-flight error ⁇ ToF , the image depth information of the optical distance measuring device 10 with respect to the object reflection point OBJ is obtained.
- the calculation module 16 formulates the objective function r( ⁇ , ⁇ , b, ⁇ ToF ) in step 206, and finds in step 208 that the objective function r( ⁇ , ⁇ , b, ⁇ ToF ) reaches the minimum value.
- Good parameters ⁇ , ⁇ , b and optimal time-of-flight error ⁇ ToF steps 206, 208 are substantially equivalent to using the measuring distance of the time-of-flight ranging method to correct the parameters ⁇ , ⁇ , b required for triangulation, and The fly-time error ⁇ ToF of the time-of-flight ranging method is corrected by the measurement distance of the triangulation method (the first measurement distance D1).
- the present invention utilizes steps 206, 208 to achieve the effects of the parameters ⁇ , ⁇ , b required for mutual calibration triangulation and the time-of-flight error ⁇ ToF of the time-of-flight ranging method.
- the calculation module 16 is based on the values corresponding to the optimal parameters ⁇ , ⁇ , b.
- the image depth information of the optical ranging device 10 obtained from the D ToF + ⁇ ToF corresponding to the optimal time-of-flight error ⁇ ToF with respect to the object reflection point OBJ can be regarded as the measurement distance of the triangulation method and the time-of-flight distance measurement method.
- the measurement distance combining/fusion (Fusion) is one, which can simultaneously have the precision of structured light and triangulation, and the advantages of modulated light and fly-time ranging method against background light interference.
- the present invention utilizes the measuring distance of the time-of-flight ranging method to correct the parameters required for the triangulation method, and uses the measuring distance of the triangulation method to correct the time-of-flight error of the time-of-flight ranging method, which is equivalent to
- the measurement distance of the triangulation method and the measurement distance of the time-of-flight distance measurement method are combined into one, which can simultaneously have the precision of the structured light and the triangulation method, and the advantages of the modulated light and the flying time ranging method against the background light interference. .
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Abstract
Description
Claims (14)
- 一种光学测距方法,应用于光学测距装置,所述光学测距装置包括发光模块以及感光模块,其中所述发光模块发射入射光,所述感光模块接受反射自对象反射点的反射光,并产生图像,其特征在于,所述方法包括:根据复数个第一参数,确定第一量测距离的表达式;根据所述入射光与所述反射光之间的飞行时间,计算飞时量测距离;根据所述第一量测距离的表达式与所述飞时量测距离,计算复数个第一参数的最优值和对应于所述飞时量测距离的飞时误差的最优值;以及根据所述飞时量测距离、所述复数个第一参数的最优值以及所述飞时误差的最优值,取得所述光学测距装置相对于所述对象反射点的影像深度信息;其中,所述复数个第一参数包括第一角度、第二角度以及所述发光模块与所述感光模块之间的第一距离;其中,所述第一角度为所述对象反射点相对于所述发光模块及所述感光模块的俯仰角,所述第二角度为所述对象反射点相对于所述发光模块及所述感光模块的方位角。
- 如权利要求1所述的光学测距方法,其特征在于,根据复数个第一参数,确定第一量测距离的表达式步骤包括:根据复数个第一参数,确定所述对象反射点相对于所述感光模块的坐标;根据所述坐标,确定所述对象反射点相对于所述感光模块的回程距离的表达式以及所述对象反射点相对于所述发光模块的去程距离的表达式;以及第一量测距离的表达式为所述回程距离的表达式与所述去程距离的表达式的总和。
- 如权利要求1所述的光学测距方法,其特征在于,根据所述第一量测距离的表达式与所述飞时量测距离,计算所述复数个第一参数的最优值和对应于所述飞时量测距离的飞时误差的最优值步骤包括:根据所述第一量测距离的表达式及所述飞时量测距离,制定目标函数;以及根据所述目标函数,计算复数个第一参数的最优值以及对应于所述飞时量测距离的飞时误差的最优值。
- 如权利要求3所述的光学测距方法,其特征在于,所述目标函数为所述第一量测距离的表达式与所述飞时量测距离及飞时误差相减的绝对值。
- 如权利要求3所述的光学测距方法,其特征在于,根据所述目标函数,计算复数个第一参数的最优值以及对应于所述飞时量测距离的飞时误差的最优值步骤包括:利用高斯牛顿算法,根据所述目标函数,计算复数个第一参数的最优值以及对应于所述飞时量测距离的飞时误差的最优值。
- 如权利要求1所述的光学测距方法,其特征在于,所述入射光包括结构光,所述根据复数个第一参数,确定第一量测距离的表达式包括:根据对应于所述结构光的反射光以及复数个第一参数,确定第一量测距离的表达式。
- 如权利要求1所述的光学测距方法,其特征在于,所述入射光包括调变光,所述根据所述入射光与所述反射光之间的飞行时间,计算飞时量测距离包括:根据对应于所述调变光的反射光以及飞行时间,计算飞时量测距离。
- 一种光学测距装置,其特征在于,包括:发光模块,用来发射入射光;感光模块,用来接受反射自对象反射点的反射光,并产生图像;以及计算模块,耦接于所述感光模块,所述计算模块包括:结构光子模块,用于根据复数个第一参数,确定第一量测距离的表达式;调变光子模块,用于根据所述入射光与所述反射光之间的飞行时间,计算飞时量测距离;最优计算子模块,用于根据所述第一量测距离的表达式与所述飞时量测距离,计算复数个第一参数的最优值和对应于所述飞时量测距离的飞时误差的最优值;以及取得子模块,用于根据所述飞时量测距离、所述复数个第一参数的最优值以及所述飞时误差的最优值,取得所述光学测距装置相对于所述对象反射点的影像深度信息;其中,所述复数个第一参数包括第一角度、第二角度以及所述发光模块与所述感光模块之间的第一距离;其中,所述第一角度为所述对象反射点相对于所述发光模块及所述感光模块的俯仰角,所述第二角度为所述对象反射点相对于所述发光模块及所述感光模块的方位角。
- 如权利要求8所述的光学测距装置,其特征在于,所述结构光子模块具体用来执行以下步骤:根据复数个第一参数,确定所述对象反射点相对于所述感光模块的坐标;根据所述坐标,确定所述对象反射点相对于所述感光模块的回程距离的表达式以及所述对象反射点相对于所述发光模块的去程距离的表达式;以及第一量测距离的表达式为所述回程距离的表达式与所述去程距离的的表达式的总和。
- 如权利要求8所述的光学测距装置,其特征在于,所述最优计算子模块用来执行以下步骤:根据所述第一量测距离的表达式、所述飞时量测距离,制定目标函数;以及根据所述目标函数,计算复数个第一参数的最优值以及对应于所述飞时量测距离的飞时误差的最优值。
- 如权利要求10所述的光学测距装置,其特征在于,所述目标函数为所述第一量测距离的表达式与所述飞时量测距离及飞时误差相减的绝对值。
- 如权利要求10所述的光学测距装置,其特征在于,所述最优计算子模块用来执行以下步骤:利用高斯牛顿算法,根据所述目标函数,计算复数个第一参数的最优值以及对应于所述飞时量测距离的飞时误差的最优值。
- 如权利要求8所述的光学测距装置,其特征在于,所述入射光包括结构光,所述结构光子模块用来执行以下步骤:根据对应于所述结构光的反射光以及复数个第一参数,确定第一量测距离的表达式;
- 如权利要求8所述的光学测距装置,其特征在于,所述入射光包括调变光,所述调变光子模块用来执行以下步骤:根据对应于所述调变光的反射光以及飞行时间,计算飞时量测距离。
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WO2019070867A2 (en) | 2017-10-08 | 2019-04-11 | Magik Eye Inc. | DISTANCE MEASUREMENT USING A LONGITUDINAL GRID PATTERN |
CN112119628B (zh) | 2018-03-20 | 2022-06-03 | 魔眼公司 | 调整相机曝光以用于三维深度感测和二维成像 |
US11474245B2 (en) | 2018-06-06 | 2022-10-18 | Magik Eye Inc. | Distance measurement using high density projection patterns |
US11475584B2 (en) | 2018-08-07 | 2022-10-18 | Magik Eye Inc. | Baffles for three-dimensional sensors having spherical fields of view |
CN109470166B (zh) * | 2018-11-09 | 2020-12-08 | 业成科技(成都)有限公司 | 结构光深度感测器及感测方法 |
WO2020150131A1 (en) | 2019-01-20 | 2020-07-23 | Magik Eye Inc. | Three-dimensional sensor including bandpass filter having multiple passbands |
WO2020197813A1 (en) | 2019-03-25 | 2020-10-01 | Magik Eye Inc. | Distance measurement using high density projection patterns |
CN110986816B (zh) * | 2019-10-20 | 2022-02-11 | 奥比中光科技集团股份有限公司 | 一种深度测量系统及其测量方法 |
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CN114730010B (zh) * | 2019-12-01 | 2024-05-31 | 魔眼公司 | 利用飞行时间信息增强基于三角测量的三维距离测量 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013104784A (ja) * | 2011-11-14 | 2013-05-30 | Mitsubishi Electric Corp | 光3次元カメラ |
CN104903677A (zh) * | 2012-12-17 | 2015-09-09 | Lsi公司 | 用于将使用不同深度成像技术生成的深度图像合并的方法和装置 |
CN105572684A (zh) * | 2014-11-05 | 2016-05-11 | 日立-Lg数据存储韩国公司 | 距离测量设备 |
TW201632912A (zh) * | 2014-12-02 | 2016-09-16 | 新加坡恒立私人有限公司 | 深度感測模組及深度感測方法 |
US20170068319A1 (en) * | 2015-09-08 | 2017-03-09 | Microvision, Inc. | Mixed-Mode Depth Detection |
CN106780618A (zh) * | 2016-11-24 | 2017-05-31 | 周超艳 | 基于异构深度摄像机的三维信息获取方法及其装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6570646B2 (en) | 2001-03-06 | 2003-05-27 | The Regents Of The University Of California | Optical distance measurement device and method thereof |
CN1632463A (zh) * | 2004-12-28 | 2005-06-29 | 天津大学 | 基于角度测量的三角法测距误差补偿装置 |
EP1931942A1 (de) * | 2005-10-06 | 2008-06-18 | Gutehoffnungshütte Radsatz GmbH | Verfahren zur berührungslosen dynamischen erfassung des profils eines festkörpers |
EP1882959A1 (de) * | 2006-07-17 | 2008-01-30 | Leica Geosystems AG | Optisches Distanzmessverfahren und entsprechender optischer Distanzmesser |
JP5338228B2 (ja) * | 2008-09-29 | 2013-11-13 | カシオ計算機株式会社 | 画像生成装置、及びプログラム |
DE102009046124A1 (de) * | 2009-10-28 | 2011-05-05 | Ifm Electronic Gmbh | Verfahren und Vorrichtung zur Kalibrierung eines 3D-TOF-Kamerasystems |
US8970827B2 (en) * | 2012-09-24 | 2015-03-03 | Alces Technology, Inc. | Structured light and time of flight depth capture with a MEMS ribbon linear array spatial light modulator |
EP2728306A1 (en) * | 2012-11-05 | 2014-05-07 | Hexagon Technology Center GmbH | Method and device for determining three-dimensional coordinates of an object |
CN103090846B (zh) * | 2013-01-15 | 2016-08-10 | 广州市盛光微电子有限公司 | 一种测距装置、测距系统及其测距方法 |
CN104280739A (zh) * | 2013-07-10 | 2015-01-14 | 富泰华工业(深圳)有限公司 | 距离测量系统及方法 |
US10061028B2 (en) * | 2013-09-05 | 2018-08-28 | Texas Instruments Incorporated | Time-of-flight (TOF) assisted structured light imaging |
CN104266605B (zh) * | 2014-06-27 | 2017-01-11 | 西北工业大学 | 一种三维激光扫描成像仪的成像方法 |
US9377533B2 (en) * | 2014-08-11 | 2016-06-28 | Gerard Dirk Smits | Three-dimensional triangulation and time-of-flight based tracking systems and methods |
JP2020500310A (ja) * | 2016-11-17 | 2020-01-09 | トリナミクス ゲゼルシャフト ミット ベシュレンクテル ハフツング | 少なくとも1つの物体を光学的に検出するための検出器 |
-
2017
- 2017-08-29 KR KR1020187016159A patent/KR102134688B1/ko active IP Right Grant
- 2017-08-29 EP EP17872880.4A patent/EP3477251B1/en active Active
- 2017-08-29 WO PCT/CN2017/099408 patent/WO2019041116A1/zh unknown
- 2017-08-29 CN CN201780001028.9A patent/CN109729721B/zh active Active
-
2018
- 2018-05-09 US US15/974,705 patent/US10908290B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013104784A (ja) * | 2011-11-14 | 2013-05-30 | Mitsubishi Electric Corp | 光3次元カメラ |
CN104903677A (zh) * | 2012-12-17 | 2015-09-09 | Lsi公司 | 用于将使用不同深度成像技术生成的深度图像合并的方法和装置 |
CN105572684A (zh) * | 2014-11-05 | 2016-05-11 | 日立-Lg数据存储韩国公司 | 距离测量设备 |
TW201632912A (zh) * | 2014-12-02 | 2016-09-16 | 新加坡恒立私人有限公司 | 深度感測模組及深度感測方法 |
US20170068319A1 (en) * | 2015-09-08 | 2017-03-09 | Microvision, Inc. | Mixed-Mode Depth Detection |
CN106780618A (zh) * | 2016-11-24 | 2017-05-31 | 周超艳 | 基于异构深度摄像机的三维信息获取方法及其装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3477251A4 * |
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