Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system(CWS) can acquire road condition, adjacent vehicle march conditi...Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system(CWS) can acquire road condition, adjacent vehicle march condition as well as its dynamics performance continuously, then it can forecast the oncoming potential collision and give a warning. Based on the analysis of driver's driving behavior, algorithm's warning norms are determined. Based on warning norms adopting machine vision method, the cooperation collision warning algorithm(CWA) model with multi-input and multi-output is established which is used in supporting vehicle CWS. The CWA is tested using the actual data and the result shows that this algorithm can identify and carry out warning for vehicle collision efficiently, which has important meaning for improving the vehicle travel safety.展开更多
Accurate stereo vision calibration is a preliminary step towards high-precision visual posi- tioning of robot. Combining with the characteristics of genetic algorithm (GA) and particle swarm optimization (PSO), a ...Accurate stereo vision calibration is a preliminary step towards high-precision visual posi- tioning of robot. Combining with the characteristics of genetic algorithm (GA) and particle swarm optimization (PSO), a three-stage calibration method based on hybrid intelligent optimization is pro- posed for nonlinear camera models in this paper. The motivation is to improve the accuracy of the calibration process. In this approach, the stereo vision calibration is considered as an optimization problem that can be solved by the GA and PSO. The initial linear values can be obtained in the frost stage. Then in the second stage, two cameras' parameters are optimized separately. Finally, the in- tegrated optimized calibration of two models is obtained in the third stage. Direct linear transforma- tion (DLT), GA and PSO are individually used in three stages. It is shown that the results of every stage can correctly find near-optimal solution and it can be used to initialize the next stage. Simula- tion analysis and actual experimental results indicate that this calibration method works more accu- rate and robust in noisy environment compared with traditional calibration methods. The proposed method can fulfill the requirements of robot sophisticated visual operation.展开更多
6G is envisioned as the next generation of wireless communication technology,promising unprecedented data speeds,ultra-low Latency,and ubiquitous Connectivity.In tandem with these advancements,blockchain technology is...6G is envisioned as the next generation of wireless communication technology,promising unprecedented data speeds,ultra-low Latency,and ubiquitous Connectivity.In tandem with these advancements,blockchain technology is leveraged to enhance computer vision applications’security,trustworthiness,and transparency.With the widespread use of mobile devices equipped with cameras,the ability to capture and recognize Chinese characters in natural scenes has become increasingly important.Blockchain can facilitate privacy-preserving mechanisms in applications where privacy is paramount,such as facial recognition or personal healthcare monitoring.Users can control their visual data and grant or revoke access as needed.Recognizing Chinese characters from images can provide convenience in various aspects of people’s lives.However,traditional Chinese character text recognition methods often need higher accuracy,leading to recognition failures or incorrect character identification.In contrast,computer vision technologies have significantly improved image recognition accuracy.This paper proposed a Secure end-to-end recognition system(SE2ERS)for Chinese characters in natural scenes based on convolutional neural networks(CNN)using 6G technology.The proposed SE2ERS model uses the Weighted Hyperbolic Curve Cryptograph(WHCC)of the secure data transmission in the 6G network with the blockchain model.The data transmission within the computer vision system,with a 6G gradient directional histogram(GDH),is employed for character estimation.With the deployment of WHCC and GDH in the constructed SE2ERS model,secure communication is achieved for the data transmission with the 6G network.The proposed SE2ERS compares the performance of traditional Chinese text recognition methods and data transmission environment with 6G communication.Experimental results demonstrate that SE2ERS achieves an average recognition accuracy of 88%for simple Chinese characters,compared to 81.2%with traditional methods.For complex Chinese characters,the average recognition accuracy improves to 84.4%with our system,compared to 72.8%with traditional methods.Additionally,deploying the WHCC model improves data security with the increased data encryption rate complexity of∼12&higher than the traditional techniques.展开更多
针对设施葡萄园采收环节作业机械化程度低、现有葡萄采收机器人作业效率低的问题,本研究设计了一种基于机器视觉的设施葡萄自动采收机。提出了基于果穗位置信息的平均切割位置定位算法与采收执行系统控制算法;构建了基于YOLOv5的葡萄果...针对设施葡萄园采收环节作业机械化程度低、现有葡萄采收机器人作业效率低的问题,本研究设计了一种基于机器视觉的设施葡萄自动采收机。提出了基于果穗位置信息的平均切割位置定位算法与采收执行系统控制算法;构建了基于YOLOv5的葡萄果穗识别模型,并通过田间试验确定了机器最佳作业参数,系统评估了其采收效能。结果表明:所构建的葡萄果穗识别模型F1分数达0.95,均值平均精度(mean Average Precision,mAP)为0.98,田间识别准确率Rr为95.35%;该机能够在底盘前进过程中完成采收执行系统定位与果穗收获作业。当前进速度为1 km/h时采收效果最优,采收成功率Rh达91.68%,采收损伤率Rb为3.99%,单穗采收效率Re为0.91 s。本研究为设施葡萄的智能化、高效低损采收提供了一套创新的技术方案,对推进设施葡萄生产机械化发展具有参考价值。展开更多
为了防止工程机械作业时触碰架空输电线缆导致安全事故,该文研制了面向架空线缆安全预警的双目视觉测距系统,基于改进半全局立体匹配(semi global block matching,SGBM)算法提高了双目相机的图像立体匹配精度。该系统可同时测量电缆多...为了防止工程机械作业时触碰架空输电线缆导致安全事故,该文研制了面向架空线缆安全预警的双目视觉测距系统,基于改进半全局立体匹配(semi global block matching,SGBM)算法提高了双目相机的图像立体匹配精度。该系统可同时测量电缆多点距离,并以测距最小值作为有效测距值,通过与安全阈值距离的比较判断是否预警。结果表明,改进的SGBM算法的图像处理时间为23.528ms,整体错误率和非遮挡错误率分别为2.89%和2.36%,能在兼顾运行效率的前提下提升图像立体匹配度、提升线缆成像质量。应用改进SGBM算法的线缆视觉测距系统有较好的测量精度和稳定性,其测距相对误差最大值不超过3%,能够满足实际环境下的性能要求。展开更多
基金Sponsored by the Special Development Foundation of High School’s Doctor Subject of China (20030006007)
摘要Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system(CWS) can acquire road condition, adjacent vehicle march condition as well as its dynamics performance continuously, then it can forecast the oncoming potential collision and give a warning. Based on the analysis of driver's driving behavior, algorithm's warning norms are determined. Based on warning norms adopting machine vision method, the cooperation collision warning algorithm(CWA) model with multi-input and multi-output is established which is used in supporting vehicle CWS. The CWA is tested using the actual data and the result shows that this algorithm can identify and carry out warning for vehicle collision efficiently, which has important meaning for improving the vehicle travel safety.
摘要Accurate stereo vision calibration is a preliminary step towards high-precision visual posi- tioning of robot. Combining with the characteristics of genetic algorithm (GA) and particle swarm optimization (PSO), a three-stage calibration method based on hybrid intelligent optimization is pro- posed for nonlinear camera models in this paper. The motivation is to improve the accuracy of the calibration process. In this approach, the stereo vision calibration is considered as an optimization problem that can be solved by the GA and PSO. The initial linear values can be obtained in the frost stage. Then in the second stage, two cameras' parameters are optimized separately. Finally, the in- tegrated optimized calibration of two models is obtained in the third stage. Direct linear transforma- tion (DLT), GA and PSO are individually used in three stages. It is shown that the results of every stage can correctly find near-optimal solution and it can be used to initialize the next stage. Simula- tion analysis and actual experimental results indicate that this calibration method works more accu- rate and robust in noisy environment compared with traditional calibration methods. The proposed method can fulfill the requirements of robot sophisticated visual operation.
基金supported by the Inner Mongolia Natural Science Fund Project(2019MS06013)Ordos Science and Technology Plan Project(2022YY041)Hunan Enterprise Science and Technology Commissioner Program(2021GK5042).
摘要6G is envisioned as the next generation of wireless communication technology,promising unprecedented data speeds,ultra-low Latency,and ubiquitous Connectivity.In tandem with these advancements,blockchain technology is leveraged to enhance computer vision applications’security,trustworthiness,and transparency.With the widespread use of mobile devices equipped with cameras,the ability to capture and recognize Chinese characters in natural scenes has become increasingly important.Blockchain can facilitate privacy-preserving mechanisms in applications where privacy is paramount,such as facial recognition or personal healthcare monitoring.Users can control their visual data and grant or revoke access as needed.Recognizing Chinese characters from images can provide convenience in various aspects of people’s lives.However,traditional Chinese character text recognition methods often need higher accuracy,leading to recognition failures or incorrect character identification.In contrast,computer vision technologies have significantly improved image recognition accuracy.This paper proposed a Secure end-to-end recognition system(SE2ERS)for Chinese characters in natural scenes based on convolutional neural networks(CNN)using 6G technology.The proposed SE2ERS model uses the Weighted Hyperbolic Curve Cryptograph(WHCC)of the secure data transmission in the 6G network with the blockchain model.The data transmission within the computer vision system,with a 6G gradient directional histogram(GDH),is employed for character estimation.With the deployment of WHCC and GDH in the constructed SE2ERS model,secure communication is achieved for the data transmission with the 6G network.The proposed SE2ERS compares the performance of traditional Chinese text recognition methods and data transmission environment with 6G communication.Experimental results demonstrate that SE2ERS achieves an average recognition accuracy of 88%for simple Chinese characters,compared to 81.2%with traditional methods.For complex Chinese characters,the average recognition accuracy improves to 84.4%with our system,compared to 72.8%with traditional methods.Additionally,deploying the WHCC model improves data security with the increased data encryption rate complexity of∼12&higher than the traditional techniques.
摘要针对设施葡萄园采收环节作业机械化程度低、现有葡萄采收机器人作业效率低的问题,本研究设计了一种基于机器视觉的设施葡萄自动采收机。提出了基于果穗位置信息的平均切割位置定位算法与采收执行系统控制算法;构建了基于YOLOv5的葡萄果穗识别模型,并通过田间试验确定了机器最佳作业参数,系统评估了其采收效能。结果表明:所构建的葡萄果穗识别模型F1分数达0.95,均值平均精度(mean Average Precision,mAP)为0.98,田间识别准确率Rr为95.35%;该机能够在底盘前进过程中完成采收执行系统定位与果穗收获作业。当前进速度为1 km/h时采收效果最优,采收成功率Rh达91.68%,采收损伤率Rb为3.99%,单穗采收效率Re为0.91 s。本研究为设施葡萄的智能化、高效低损采收提供了一套创新的技术方案,对推进设施葡萄生产机械化发展具有参考价值。
摘要为了防止工程机械作业时触碰架空输电线缆导致安全事故,该文研制了面向架空线缆安全预警的双目视觉测距系统,基于改进半全局立体匹配(semi global block matching,SGBM)算法提高了双目相机的图像立体匹配精度。该系统可同时测量电缆多点距离,并以测距最小值作为有效测距值,通过与安全阈值距离的比较判断是否预警。结果表明,改进的SGBM算法的图像处理时间为23.528ms,整体错误率和非遮挡错误率分别为2.89%和2.36%,能在兼顾运行效率的前提下提升图像立体匹配度、提升线缆成像质量。应用改进SGBM算法的线缆视觉测距系统有较好的测量精度和稳定性,其测距相对误差最大值不超过3%,能够满足实际环境下的性能要求。