WO2020186943A1 - 移动设备的姿态确定装置、方法和视觉里程计 - Google Patents
移动设备的姿态确定装置、方法和视觉里程计 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/269—Analysis of motion using gradient-based methods
Definitions
- the present disclosure relates to the field of computer technology, and in particular to a posture determination device of a mobile device, a posture method of a mobile device, a visual odometer and a computer-readable storage medium.
- the visual odometer can determine the position and posture of the robot by analyzing and processing related image sequences, and then record the entire trajectory of the robot.
- the visual odometer combines the image information of adjacent frames in the video stream, and uses the local map to optimize the camera pose of the corresponding frame based on the geometric characteristics of the image; or based on the IMU (Inertial Measurement Unit) to provide Information to determine the camera pose.
- IMU Inertial Measurement Unit
- an apparatus for determining a posture of a mobile device including one or more processors configured to determine the current frame and the previous frame in the video stream acquired by the mobile device.
- Image difference characteristics between frames according to the image difference characteristics, the first machine learning model is used to obtain current encoding information; according to the current encoding information and at least one historical encoding information, the second machine learning model is used to determine the movement The attitude of the device.
- the current frame is the Mth frame, and M is a positive integer greater than 1. At least one of the movement distance or the posture change of the mobile device corresponding to the Nth frame to the N-1th frame If the threshold is exceeded, the coding information of the Nth frame is stored as the historical coding information, and N is a positive integer less than M.
- the various channel components of the current coding information are fused to obtain the current coding information after fusion;
- the correlation between the various channel components is to fuse each channel component of the historical coding information to obtain the fused historical coding information; according to the fused current coding information and the fused historical coding information, use
- the second machine learning model determines the posture of the mobile device.
- the first weight of each channel component is determined according to the correlation between each channel component of the current coding information; the each channel component is weighted according to the first weight to obtain the The current encoding information after the fusion is described.
- the second weight of each channel component is determined according to the correlation between each channel component of each historical coded information; each channel component is weighted according to the second weight to obtain The fused historical coding information.
- the historical coding information is fused to obtain integrated historical coding information; according to the integrated historical coding information and the current coding information, the second The machine learning model determines the posture of the mobile device.
- the third weight of each historical coding information is determined according to the correlation between each historical coding information; according to the third weight, the weighted sum of each historical coding information is performed to obtain the Describes comprehensive historical coding information.
- the current encoding information and the historical encoding information are spliced according to the channel dimension direction to generate output encoding information; according to the output encoding information, the second machine learning model is used to determine the mobile device Gesture.
- the image difference feature is acquired through an optical flow network model; at least one of the first machine learning model and the second machine learning model is ConvLSTM (Convolutional Long Short-Term Memory Network, convolution Long short-term memory network) model.
- ConvLSTM Convolutional Long Short-Term Memory Network, convolution Long short-term memory network
- a method for determining the posture of a mobile device including: determining the image difference feature between the current frame and the previous frame in the video stream acquired by the mobile device; and according to the image difference Characteristic, using a first machine learning model to determine current encoding information; using a second machine learning model to determine the posture of the mobile device according to the current encoding information and at least one piece of historical encoding information.
- the current frame is the Mth frame, and M is a positive integer greater than 1. At least one of the movement distance or the posture change of the mobile device corresponding to the Nth frame to the N-1th frame If the threshold is exceeded, the coding information of the Nth frame is stored as the historical coding information, and N is a positive integer less than M.
- the various channel components of the current coding information are fused to obtain the current coding information after fusion;
- the correlation between the various channel components is to fuse each channel component of the historical coding information to obtain the fused historical coding information; according to the fused current coding information and the fused historical coding information, use
- the second machine learning model determines the posture of the mobile device.
- the first weight of each channel component is determined according to the correlation between each channel component of the current coding information; the each channel component is weighted according to the first weight to obtain the The current encoding information after the fusion is described.
- the second weight of each channel component is determined according to the correlation between each channel component of each historical coded information; each channel component is weighted according to the second weight to obtain The historical coding information after the fusion.
- the at least one piece of historical coding information includes multiple pieces of historical coding information, and according to the correlation between each piece of historical coding information, the pieces of historical coding information are fused to obtain comprehensive historical coding information; Synthesize the historical coding information and the current coding information, and use a second machine learning model to determine the posture of the mobile device.
- the third weight of each historical coding information is determined according to the correlation between each historical coding information; according to the third weight, the weighted sum of each historical coding information is performed to obtain the Describes comprehensive historical coding information.
- the current encoding information and the historical encoding information are spliced according to the channel dimension direction to generate output encoding information; according to the output encoding information, the second machine learning model is used to determine the mobile device Gesture.
- the image difference feature is obtained through an optical flow network model; at least one of the first machine learning model and the second machine learning model is a ConvLSTM model.
- a visual odometer including: the posture determination apparatus as described in any of the foregoing embodiments, configured to determine the posture of the mobile device according to the video stream shot by the mobile device.
- the visual odometer further includes an image sensor for acquiring the video stream.
- a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the posture determination method as described in any of the foregoing embodiments is implemented.
- Fig. 1 is a flowchart showing a method for determining a posture of a mobile device according to an embodiment of the present disclosure
- Fig. 2a is a schematic diagram showing a method for determining a posture of a mobile device according to an embodiment of the present disclosure
- FIG. 2b is a schematic diagram showing ConvLSTM used in a method for determining a posture of a mobile device according to an embodiment of the present disclosure
- FIG. 3 is a flowchart showing an embodiment of step 130 in FIG. 1;
- FIG. 4 is a schematic diagram showing an embodiment of step 1320 in FIG. 3;
- FIG. 5 is a flowchart showing another embodiment of step 130 in FIG. 1;
- FIG. 6 is a schematic diagram showing an embodiment of step 1321 in FIG. 5;
- FIG. 7 is a flowchart showing another embodiment of step 130 in FIG. 1;
- Fig. 8 is a block diagram showing an apparatus for determining a posture of a mobile device according to an embodiment of the present disclosure
- FIG. 9 is a block diagram showing an apparatus for determining a posture of a mobile device according to another embodiment of the present disclosure.
- FIG. 10 is a block diagram showing a visual odometer according to an embodiment of the present disclosure.
- Fig. 1 is a flowchart showing a method for determining a posture of a mobile device according to an embodiment of the present disclosure.
- the method includes: step 110, determining the image difference feature; step 120, determining the current encoding information; and step 130, determining the posture of the mobile device.
- step 110 the image difference feature between the current frame and the previous frame in the video stream acquired by the mobile device is determined.
- the mobile device may be a movable platform such as a robot, an unmanned vehicle, a drone, etc., and images are taken by a camera based on an image sensor such as a CCD or CMOS.
- a movable platform such as a robot, an unmanned vehicle, a drone, etc.
- images are taken by a camera based on an image sensor such as a CCD or CMOS.
- the image difference feature can be obtained through a convolutional neural network (CNN).
- CNN convolutional neural network
- optical flow network Learning Optical Flow with Convolutional Networks
- Flownet Learning Optical Flow with Convolutional Networks
- optical flow network (FlowNet 2.0: Evolution of Optical Flow Estimation with Deep Networks) model can be used to obtain image difference features.
- two adjacent frames of images can be superimposed and input into the optical flow network model, and the feature extraction part of the optical flow network model is used to extract the image difference features.
- the image difference feature is a high-dimensional feature, and the number of channels (such as 1024) of the high-dimensional feature can be determined according to the resolution of the current frame image.
- the optical flow network model can perform multiple convolution processing on the overlapped image, and extract the offset of each pixel of two adjacent frames of image as the image difference feature according to the convolution processing result.
- high-dimensional redundant image information can be converted into high-level, abstract semantic features, which solves the problem that related technologies based on geometric features are susceptible to environmental factors (such as occlusion, lighting changes, dynamic objects, etc.), thereby improving The accuracy of attitude determination is improved.
- the first machine learning model is used to determine the current encoding information according to the image difference characteristics.
- the first machine learning model may be an RNN (Recurrent Neural Network) model, such as a ConvLSTM model.
- historical coding information (that is, coding information corresponding to key frames) that has an important influence on pose determination can be filtered from the historical output of the RNN model as effective information.
- the effective information can be fused with the current coded information to jointly determine the current posture of the mobile device. For example, in the case that at least one of the movement distance or posture change corresponding to the mobile device from the Nth frame to the N-1th frame exceeds the threshold, the Nth frame is determined to be a key frame; the code of the Nth frame extracted by the RNN model is stored The information is used as historical coding information.
- a second machine learning model is used to determine the posture of the mobile device according to the current encoding information and at least one historical encoding information.
- the second machine learning model may be an RNN model, such as a ConvLSTM model. Using the RNN model to decode the encoded information, the posture of the mobile device can be determined.
- This current posture determined based on current coding information and historical coding information is a posture determined by global optimization (that is, absolute posture) in the global range from the first frame to the current frame of the video stream.
- the absolute posture is more accurate.
- the ConvLSTM model does not need to rely on the information provided by the IMU, and only relies on visual information to determine the attitude determination state, thereby reducing the cost of attitude determination.
- Fig. 2a is a schematic diagram showing a method for determining a posture of a mobile device according to an embodiment of the present disclosure.
- the extracted current coding information from 1 to T is x 1 to x T.
- the historical coding information stored at each time is S 2 to S T.
- the current coding information and historical coding information at each time are used as the input of the first machine learning model (such as ConvLSTM) to obtain output coding information O 1 to O T at each time.
- X t , h t , and o t represent input characteristics, state variables and output respectively.
- step 130 may be implemented by the steps in Figure 2a.
- ConvLSTM Framework Connection LSTM, fully connected long short-term memory
- the machine learning model (such as neural network, etc.) have the required functions, before using the machine learning model, it also includes the use of multiple samples, such as sample images, sample data, etc. for machine learning The steps of model training.
- the trained machine learning model can be used in the above methods.
- the required machine learning model can be trained and obtained in a supervised manner (samples and labels corresponding to the samples).
- FIG. 3 is a flowchart showing an embodiment of step 130 in FIG. 1.
- step 130 includes: step 1310, fusing each channel component of the current coded information; step 1320, fusing each channel component of the historical coded information; and step 1330, determining the posture of the mobile device.
- step 1310 according to the correlation between the channel components of the current encoded information, the channel components of the current encoded information are fused.
- the first weight of each channel component is determined according to the correlation between each channel component of the current encoded information; each channel component is weighted according to the first weight to obtain the current encoded information after fusion.
- the current encoding information is the output O t of the first machine learning model at the current moment.
- O t has J channel components: O t1 , O t2 ... O tJ .
- step 1320 according to the correlation between the various channel components of the historical coding information, the various channel components of the historical coding information are fused.
- the second weight of each channel component is determined according to the correlation between each channel component of each historical coding information; each channel component is weighted according to the second weight to obtain the fused historical coding information .
- the set of stored historical coding information is S
- S contains I historical coding information S 1 , S 2 ... S i ... S I
- i is a positive integer smaller than 1.
- Any S i has J channel components: S i1 , S i2 ... S iJ .
- S i1, S i2 ... S iJ weighted processing to obtain S 'i.
- These S'i constitute the fused historical coded information set S'.
- step 1330 the second machine learning model is used to determine the posture of the mobile device according to the fused current coding information and historical coding information.
- step 1310 and step 1320 are not executed in an order, and can also be processed in parallel; only step 1310 or step 1320 can also be executed.
- FIG. 4 is a schematic diagram showing an embodiment of step 1320 in FIG. 3.
- any history of a reservoir having a plurality of encoded information S i 4 channel components According to the correlation coefficient between each channel component, the weight of each channel component is calculated by the gate function. The channel components are weighted to obtain the fused S'i .
- 130 may be implemented through the steps in FIG. 3.
- FIG. 5 is a flowchart showing another embodiment of step 130 in FIG. 1.
- step 130 includes: step 1321, fusing various historical coding information; and step 1330', determining the posture of the mobile device.
- step 1321 according to the correlation between the historical coding information, the historical coding information is merged to obtain comprehensive historical coding information.
- the third weight of each historical coding information is determined according to the correlation between each historical coding information; according to the third weight, each historical coding information is weighted and summed to obtain comprehensive historical coding information.
- the correlation between the historical coding information S 1 , S 2 ... S i ... S I is calculated, and the corresponding weight of S 1 , S 2 ... S i ... S I is determined according to the correlation. Perform weighted summation on S 1 , S 2 ...S i ...S I to obtain comprehensive historical coding information
- the integrated historical coding information can be fused; it is also possible to fuse each channel component of the historical coding information according to the embodiment in Figure 2 to obtain S', and then perform the fusion of each historical coding information in S'according to the embodiment in Figure 3 Fusion.
- the historical coding information can be firstly integrated in space or time.
- a second machine learning model is used to determine the posture of the mobile device according to the integrated historical coding information and current coding information.
- FIG. 6 is a schematic diagram showing an embodiment of step 1321 in FIG. 5.
- the set S of stored historical coding information includes S 1 , S 2 ... S i ... S I.
- the correlation coefficient between the S 1, S 2 ... S i ... S I, S 1 is calculated using the gate function, S 2 ... S i ... S I corresponding to the right weight.
- S 1, S 2 ... S i ... S I obtained weighted S '1, S 2 ... S ' i ... S 'I.
- S '1, S 2 ... S ' i ... S 'I summed integrated encoded information history
- step 130 may be implemented by the steps in FIG. 7.
- FIG. 7 is a flowchart showing another embodiment of step 130 in FIG. 1.
- step 130 includes: step 1322, splicing current coding information and historical coding information; and step 1330", determining the posture of the mobile device.
- the current coding information and historical coding information are spliced according to the channel dimension direction to generate output coding information. That is to say, the current coding information and historical coding information are used as the feature matrix, and each layer (ie, each channel) of the matrix is used as a part for splicing. For example, it can be spliced by a neural network model with two convolutional layers (for example, the size of the convolution kernel is 3 ⁇ 3, and the convolution step size is 1).
- the historical coding information and the current coding information may be merged in time and space before splicing.
- step 1330 the second machine learning model is used to determine the posture of the mobile device according to the output code information.
- the posture determination method provided by the embodiment of the present disclosure was tested on the public unmanned driving data set KITTI, and the average rotation error did not exceed 3 degrees per 100 meters, and the average translation error did not exceed 5%.
- Fig. 8 is a block diagram showing an apparatus for determining a posture of a mobile device according to an embodiment of the present disclosure.
- the device 8 for determining the posture of the mobile device includes one or more processors 81.
- the processor 81 is configured to obtain the image difference feature between the current frame and the previous frame in the video stream shot by the mobile device.
- the image difference feature is obtained through the optical flow network model.
- the processor 81 is configured to: use the first machine learning model to obtain current coding information according to the image difference characteristics; and use the second machine learning model to determine the posture of the mobile device according to the current coding information and at least one piece of historical coding information.
- at least one of the first machine learning model and the second machine learning model is a ConvLSTM model.
- the posture determination device further includes a memory 82.
- the memory 82 is configured to store the encoding information of the Nth frame as historical encoding information when at least one of the movement distance or the posture change corresponding to the mobile device from the Nth frame to the N-1th frame exceeds a threshold.
- the processor 81 fuses each channel component of the currently encoded information according to the correlation between each channel component of the currently encoded information.
- the processor 81 fuses the various channel components of the historical coding information according to the correlation between the various channel components of the historical coding information.
- the processor 81 uses the second machine learning model to determine the posture of the mobile device according to the fused current coding information and historical coding information.
- the processor 81 determines the first weight of each channel component according to the correlation between each channel component of the currently encoded information.
- the processor 81 weights each channel component according to the first weight to obtain the current encoded information after fusion.
- the processor 81 determines the second weight of each channel component according to the correlation between each channel component of each piece of historical coding information.
- the processor 81 weights each channel component according to the second weight to obtain the fused historical coding information.
- the processor 81 fuses various historical coding information according to the correlation between various historical coding information to obtain comprehensive historical coding information.
- the processor 81 uses the second machine learning model to determine the posture of the mobile device according to the integrated historical coding information.
- the processor 81 determines the third weight of each historical encoding information according to the correlation between each historical encoding information.
- the processor 81 performs a weighted summation on the historical coding information according to the third weight to obtain comprehensive historical coding information.
- the processor 81 splices current encoding information and historical encoding information according to the channel dimension direction to generate output encoding information.
- the processor 81 uses the second machine learning model to determine the posture of the mobile device according to the output code information.
- FIG. 9 is a block diagram showing an apparatus for determining a posture of a mobile device according to another embodiment of the present disclosure.
- the posture determination device can be expressed in the form of a general-purpose computing device.
- the computer system includes a memory 910, a processor 920, and a bus 900 connecting different system components.
- the memory 910 may include, for example, a system memory, a nonvolatile storage medium, and the like.
- the system memory for example, stores an operating system, an application program, a boot loader (Boot Loader), and other programs.
- the system memory may include volatile storage media, such as random access memory (RAM) and/or cache memory.
- RAM random access memory
- the non-volatile storage medium stores, for example, instructions for executing corresponding embodiments of the display method.
- Non-volatile storage media include, but are not limited to, magnetic disk storage, optical storage, flash memory, etc.
- the processor 920 can be implemented by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors and other discrete hardware components.
- DSP digital signal processor
- ASIC application-specific integrated circuit
- FPGA field programmable gate array
- each module such as the judgment module and the determination module can be implemented by a central processing unit (CPU) running instructions for executing corresponding steps in the memory, or can be implemented by a dedicated circuit that executes the corresponding steps.
- CPU central processing unit
- the bus 900 can use any bus structure among a variety of bus structures.
- the bus structure includes, but is not limited to, an industry standard architecture (ISA) bus, a microchannel architecture (MCA) bus, and a peripheral component interconnect (PCI) bus.
- ISA industry standard architecture
- MCA microchannel architecture
- PCI peripheral component interconnect
- the computer system may also include an input/output interface 930, a network interface 940, a storage interface 950, and so on. These interfaces 930, 940, 950, and the memory 910 and the processor 920 may be connected through a bus 900.
- the input and output interface 930 can provide a connection interface for input and output devices such as a display, a mouse, and a keyboard.
- the network interface 940 provides a connection interface for various networked devices.
- the storage interface 940 provides a connection interface for external storage devices such as floppy disks, U disks, and SD cards.
- FIG. 10 is a block diagram showing a visual odometer according to an embodiment of the present disclosure.
- the visual odometer 10 includes the posture determination device 11 in any of the above embodiments, which is used to determine the posture of the mobile device according to the video stream shot by the mobile device.
- the visual odometer 10 further includes an imaging device, such as an image sensor 12, for acquiring a video stream.
- an imaging device such as an image sensor 12, for acquiring a video stream.
- the imaging device can communicate with the processor in the attitude determination device 11 through wireless, such as Bluetooth, Wi-Fi, etc.; or through wired, such as network cables, cables, wiring, etc., and the attitude determination device The processor communication connection in 11.
- the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transitory storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. .
- the method and system of the present disclosure may be implemented in many ways.
- the method and system of the present disclosure can be implemented by software, hardware, firmware or any combination of software, hardware, and firmware.
- the above-mentioned order of the steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated.
- the present disclosure can also be implemented as programs recorded in a recording medium, and these programs include machine-readable instructions for implementing the method according to the present disclosure.
- the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
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Abstract
Description
Claims (21)
- 一种移动设备的姿态确定装置,包括一个或多个处理器,所述处理器被配置为:确定所述移动设备获取的视频流中当前帧与上一帧之间的图像差别特征;根据所述图像差别特征,利用第一机器学习模型,确定当前编码信息;根据所述当前编码信息和至少一个历史编码信息,利用第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求1所述的姿态确定装置,其中,所述当前帧为第M帧,M为大于1的正整数;所述姿态确定装置还包括存储器,所述存储器被配置为:在从第N帧到第N-1帧对应的所述移动设备的运动距离或者姿态变化中的至少一个超过阈值的情况下,存储第N帧的编码信息作为所述历史编码信息,N为小于M的正整数。
- 根据权利要求1所述的姿态确定装置,其中,根据所述当前编码信息和至少一个历史编码信息,利用第二机器学习模型确定所述移动设备的姿态包括:根据所述当前编码信息的各通道分量之间的相关性,对所述当前编码信息的各通道分量进行融合,得到融合后的当前编码信息;根据所述历史编码信息的各通道分量之间的相关性,对所述历史编码信息的各通道分量进行融合,得到融合后的历史编码信息;根据所述融合后的当前编码信息和所述融合后的历史编码信息,利用第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求3所述的姿态确定装置,其中,对所述当前编码信息的各通道分量进行融合包括:根据所述当前编码信息各通道分量之间的相关性,确定所述各通道分量的第一权重;根据所述第一权重,对所述各通道分量进行加权,得到所述融合后的当前编码信息。
- 根据权利要求3所述的姿态确定装置,其中,对所述历史编码信息的各通道分量进行融合包括:根据每个历史编码信息的各通道分量之间的相关性,确定所述各通道分量的第二权重;根据所述第二权重,对所述各通道分量进行加权,得到所述融合后的历史编码信息。
- 根据权利要求1所述的姿态确定装置,其中,所述至少一个历史编码信息包括多个历史编码信息,利用第二机器学习模型确定所述移动设备的姿态包括:根据各历史编码信息之间的相关性,对所述各历史编码信息进行融合,得到综合历史编码信息;根据所述综合历史编码信息和所述当前编码信息,利用所述第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求6所述的姿态确定装置,其中,对所述各历史编码信息进行融合包括:根据各历史编码信息之间的相关性,确定所述各历史编码信息的第三权重;根据所述第三权重,对所述各历史编码信息进行加权求和,得到所述综合历史编码信息。
- 根据权利要求1所述的姿态确定装置,其中,所述利用第二机器学习模型确定所述移动设备的姿态包括:将所述当前编码信息和所述历史编码信息,按照通道维度方向拼接,生成输出编码信息;根据所述输出编码信息,利用所述第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求1-8任一项所述的姿态确定装置,其中,所述图像差别特征通过光流网络模型获取;所述第一机器学习模型和所述第二机器学习模型中的至少一个为卷积长短期记忆ConvLSTM模型。
- 一种移动设备的姿态确定方法,包括:确定所述移动设备获取的视频流中当前帧与上一帧之间的图像差别特征;根据所述图像差别特征,利用第一机器学习模型,确定当前编码信息;根据所述当前编码信息和至少一个历史编码信息,利用第二机器学习模型,确定所述移动设备的姿态。
- 根据权利要求10所述的姿态确定方法,其中,所述当前帧为第M帧,M为大于1的正整数,所述的姿态确定方法还包括:在从第N帧到第N-1帧对应的所述移动设备的运动距离或者姿态变化中的至少一个超过阈值的情况下,存储第N帧的编码信息作为所述历史编码信息,N为小于M的正整数。
- 根据权利要求10所述的姿态确定方法,其中,根据所述当前编码信息和至少一个历史编码信息,利用第二机器学习模型确定所述移动设备的姿态包括:根据所述当前编码信息的各通道分量之间的相关性,对所述当前编码信息的各通道分量进行融合,得到融合后的当前编码信息;根据所述历史编码信息的各通道分量之间的相关性,对所述历史编码信息的各通道分量进行融合,得到融合后的历史编码信息;根据所述融合后的当前编码信息和所述融合后的历史编码信息,利用所述第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求12所述的姿态确定方法,其中,对所述当前编码信息的各通道分量进行融合包括:根据所述当前编码信息各通道分量之间的相关性,确定所述各通道分量的第一权重;根据所述第一权重,对所述各通道分量进行加权,得到所述融合后的当前编码信息。
- 根据权利要求12所述的姿态确定方法,其中,对所述历史编码信息的各通道分量进行融合包括:根据每个历史编码信息的各通道分量之间的相关性,确定所述各通道分量的第二权重;根据所述第二权重,对所述各通道分量进行加权,得到所述融合后的所述历史编码信息。
- 根据权利要求10所述的姿态确定方法,其中,所述至少一个历史编码信息包括多个历史编码信息,利用第二机器学习模型确定所述移动设备的姿态包括:根据各历史编码信息之间的相关性,对所述各历史编码信息进行融合,得到综合历史编码信息;根据所述综合历史编码信息和所述当前编码信息,利用第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求15所述的姿态确定方法,其中,对所述各历史编码信息进行融合包括:根据各历史编码信息之间的相关性,确定所述各历史编码信息的第三权重;根据所述第三权重,对所述各历史编码信息进行加权求和,得到所述综合历史编码信息。
- 根据权利要求10所述的姿态确定方法,其中,所述利用第二机器学习模型确定所述移动设备的姿态包括:将所述当前编码信息和所述历史编码信息,按照通道维度方向拼接,生成输出编码信息;根据所述输出编码信息,利用所述第二机器学习模型确定所述移动设备的姿态。
- 根据权利要求10-17任一项所述的姿态确定方法,其中,所述图像差别特征通过光流网络模型获取;所述第一机器学习模型和所述第二机器学习模型中的至少一个为卷积长短期记忆ConvLSTM模型。
- 一种视觉里程计,包括:权利要求1-9任一项所述的姿态确定装置,用于根据移动设备拍摄的视频流确定所述移动设备的姿态。
- 根据权利要求19所述的视觉里程计,还包括:图像传感器,用于获取所述视频流。
- 一种计算机可读存储介质,其上存储有计算机程序,该程序被处理器执行时实现如权利要求10-18中任一项所述的姿态确定方法。
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| CN112268564B (zh) * | 2020-12-25 | 2021-03-02 | 中国人民解放军国防科技大学 | 一种无人机降落空间位置和姿态端到端估计方法 |
| CN112651345B (zh) * | 2020-12-29 | 2023-11-10 | 深圳市优必选科技股份有限公司 | 一种人体姿态识别模型优化方法、装置和终端设备 |
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