163results about How to "Solve the low detection accuracy" patented technology

The invention provides a vehicle appearance damage identification method based on deep learning. The vehicle appearance damage identification method comprises the steps of obtaining an actual vehicleappearance damage image and marking a damage type and a position; Building a deep convolutional neural network; Carrying out model training to obtain a trained model; And vehicle appearance damage identification and model evaluation are carried out by using the trained model. According to the vehicle appearance damage identification method based on deep learning, the damage type and degree of thevehicle appearance part are identified in a complex environment based on the deep convolutional neural network model, and the algorithm operation speed is improved while the algorithm precision is ensured.

The present invention discloses a pedestrian detection method based on semantic segmentation information, and relates to the field of a pedestrian detection method based on a neural network. The pedestrian detection method based on semantic segmentation information comprises the steps of: 1: inputting original RGB images in training set samples into a backbone network, inputting corresponding semantic segmentation images into branch networks, and setting a loss function of the whole network to complete training; 2: inputting the original RGB images in THE training set samples into the backbonenetwork which completes training to perform convolutional feature extraction and generate a multi-layer feature map; 3: inputting the multi-layer feature map into an area generation network which completes training to perform pedestrian candidate frame extraction and generate a pedestrian candidate area; and 4: performing classification and location of the pedestrian candidate area by a classification regression network which completes training to output detection result images including a pedestrian position surrounding frame. The problem is solved that pedestrians and backgrounds are difficult to be distinguished in a low-resolution condition to cause low detection precision in the current pedestrian detection, and the precision of pedestrian detection is improved in the low-resolutioncondition.

The invention discloses a VAD dynamic parameter adjusting method and device, and the method comprises the steps: extracting an emotion feature vector of a voice signal of each sentence in a training corpus; enabling the emotion feature vector of the voice signal of each sentence to serve as the input feature of a neural network, enabling a pre-determined optimal VAD parameter sequence of the voice signal of each sentence to serve as the expected output of the neural network, employing a set neural network training algorithm, and carrying out the training of the built neural network; and carrying out the voice end point detection of a current sentence during voice processing through a VAD parameter which is outputted by the trained neural network through taking the emotion feature vector of a former sentence of the current sentence as an input feature. The method finds out the rule between the emotion information in voice and related parameters of a VAD model, obtains a VAD effective optimal parameter model, employs the optimal parameter model to carry out the dynamic pre-estimation of the VAD parameters during voice end point detection, and achieves an effect of optimizing the VAD in a special scene.

The invention provides a remote sensing target detection method based on boundary constraint CenterNet, which is used for solving the technical problems of relatively low detection precision and recall rate of dense small targets in the prior art. The method comprises the following implementation steps: obtaining a training sample set; the method comprises the following steps: constructing a boundary constraint CenterNet network; obtaining a prediction label and an embedded vector of the training sample set; calculating the loss of the boundary constraint CenterNet network; carrying out the training of a boundary constraint CenterNet network; and obtaining a target detection result based on the trained boundary constraint CenterNet network. Through performing maximum pooling in the constrained pooling area through the corner constraint pooling layer, the fine features around the target are extracted, the detection precision and recall rate of dense small targets are effectively improved, meanwhile, the boundary constraint label generated by the boundary constraint convolutional network is utilized to constrain the prediction box, a more accurate target prediction box is obtained, and the detection precision of the target is further improved.

The invention discloses a method for detecting and identifying traffic signal lamps in real time, and belongs to the field of traffic light detection and identification. The method is provided for solving the problem that the YOLOv4 algorithm is insensitive to small target detection, so that the traffic signal lamp detection precision is low. A shallow feature enhancement mechanism is provided, two shallow features in different stages in a feature extraction network are fused with high-level semantic features obtained after two times of up-sampling respectively, so that the scale of two detection layers is increased, and the positioning and color determining capability of the network for small targets are improved. A bounding box uncertainty prediction mechanism is introduced, output coordinates of a prediction bounding box are modeled, a Gaussian model is added to calculate the uncertainty of coordinate information, and the reliability of the prediction bounding box is improved. A LISA traffic signal lamp data set is used for carrying out detection and identification experiments, and the AUC value of an improved YOLOv4 algorithm in the detection experiments is 97.58% and is increased by 7.09% compared with VVA. The mean value of the average precision of the improved YOLOv4 algorithm in the recognition experiment is 82.15%, which is 2.86% higher than that of the original YOLOv4algorithm. The improved YOLOv4 algorithm improves the detection and identification precision of the traffic signal lamp.

The invention relates to a ceramic wall and floor tile surface defect detection device and method based on multi-feature information fusion. The method is characterized by adopting two brightness-adjustable LED white backlight sources to illuminate the ceramic tile surface in an illuminating mode of being inclined to the tile surface at a low angle to obtain a ceramic wall and floor tile with uniform light distribution; collecting image data of the ceramic wall and floor tile through a CCD camera; extracting a suspected defect area of the image data; adjusting the brightness, height and angleof the LED white backlight sources and controlling the height of the CCD camera; collecting image data of a clearer suspected defect area; and finishing multi-feature calculation and information fusion through a fuzzy classifier based on a fuzzy C-mean algorithm, and identifying the defect type corresponding to the suspected defect area. The method can fuse various characteristic quantities, distributed in a grayscale feature space and a morphological feature space, of the suspected defect area of the ceramic wall and floor tile, can accurately and effectively determine existence of the defectand the type of the defect, and is good in defect detection effect.

The invention discloses a video color bar detecting method and a video color bar detecting device. In order to solve the problem of low accuracy in color bar detection, the method disclosed by the invention comprises the following steps of: performing boundary search on a video frame to be detected so as to determine boundary lines of each area of the video frame to be detected; acquiring boundary points obtained by intersecting each boundary line with the scanning line by taking a straight line which intersects with each boundary line as a scanning line; and determining the video frame to be detected to be the color bar based on that an analysis result of the position information of boundary points on the scanning line is in accordance with predetermined color bar characteristics. Therefore, by determining the boundary line and determining the boundary point obtained by intersecting the boundary line with the scanning line by using a boundary search algorithm, and determining the video frame to be detected as the color bar based on that the analysis result of the boundary points on the scanning line is in accordance with the predetermined color bar characteristics, high accuracy of the detection is ensured.

The invention relates to an image change detecting method based on principle component general inverse transformation in the technical field of image processing. The method comprises the following steps of: carrying out transformation in two characteristic spaces after reorganizing data of an image to be detected; carrying out waveband updating differential treatment in the transformed characteristic spaces to obtain a changed component; and extracting a change area by an automatic threshold value confirming method to realize image change detection. The invention carries out differential detection on an image in the characteristic spaces obtained after principle component general inverse transformation, effectively inhibits noise, reduces the influence of image fuzzy distortion, and the like on the reduction of detecting precision and improves the detecting precision.

The invention discloses a road section average travelling time calculation method based on an electronic license plate. The method includes that an electronic license plate is installed on each vehicle, and an electronic license plate card reading device is installed at the position of an entrance/exit of a road. When vehicles pass through the card reading device, the card reading device reads the electronic license plate of each vehicle and transmits the read electronic license plate, the reading time, the reading position and other information to a center server, and the center server removes vehicle samples with the travelling time obviously difference from the average travelling time according to the read information of the vehicles, and comprehensively calculates the average traveling time of the road section in multiple directions. Compared with travelling time calculation based on an electronic license plate method, the method has the obvious advantages of low cost and high accuracy. Reading of the electronic license plates is not affected by weather and illumination, the problem of low detection accuracy caused by factors such as the weather and the illumination when a video mode is adopted to conduct license plate recognition is solved, and shortest travelling time calculation can be conducted accurately.

The invention provides a vehicle remaining oil quantity detection method and device, a vehicle and a storage medium. The method comprises the steps of: determining the current acceleration and the current angle of a vehicle according to current vehicle state parameters; obtaining an oil quantity voltage value output by the oil quantity sensor in a set time period according to a preset period so asto obtain a first preset number of oil quantity voltage values, and determining a current oil quantity voltage mean value based on the first preset number of oil quantity voltage values; according tothe current acceleration and the current angle, determining whether a current oil quantity voltage mean value is reserved or not; when it is determined that the current oil quantity voltage mean value is reserved, determining the current oil quantity resistance value according to the current oil quantity voltage mean value; determining a current oil quantity resistance mean value according to a second preset number of oil quantity resistance values and the current oil quantity resistance value which are sequentially determined and obtained from the current moment to the front; and based on the corresponding relation between the pre-stored residual oil quantity of the oil tank and the oil quantity resistance value, determining the current residual oil quantity of the vehicle according to the current oil quantity resistance mean value.

The invention provides a junk short message detection method, a terminal and a computer readable storage medium, and the junk short message detection method comprises the steps: carrying out the preprocessing of a received short message, and obtaining a digital code string; obtaining a target matrix according to the digital coding string; and determining whether the received short message is a junk short message or not according to the target matrix. The method comprises the following steps of: preprocessing a received short message to obtain a digital coding string; obtaining a target matrixaccording to the digital coding string; determining whether the received short message is a junk short message or not according to the target matrix; characteristics are automatically extracted, manual intervention is not needed, the detection precision is greatly improved, and the problem that in the prior art, the Chinese spam short message detection precision is low is well solved.

The invention discloses a fine granularity classification-based unmanned aerial vehicle identifying and locating method. Based on fine granularity classification after object coarse granularity detection, specific external structure information of an unmanned aerial vehicle is searched out according to an identified unmanned aerial vehicle type and unmanned aerial vehicle type library information;in combination with internal parameters of a camera, two-dimensional coordinates of the unmanned aerial vehicle are mapped into three-dimensional coordinates to determine the position, in a three-dimensional space, of the unmanned aerial vehicle; and through continuous three-dimensional coordinate information of frame pictures, trajectory information of the unmanned aerial vehicle can be obtainedin the three-dimensional space. The method solves the problem of inaccurate identifying and locating of the unmanned aerial vehicle in the prior art.

The invention provides an over-coverage area detection method and device, equipment and a storage medium. The method comprises the following steps: acquiring a target positioning point in an area to be detected, wherein the target positioning point is covered by signals of at least two cells; determining whether the target positioning point is over-covered or not according to the position relationship between the target positioning point and the at least two cells; and if the number of the target positioning points which are determined to be over-covered in the to-be-detected area meets a preset threshold condition, determining that the to-be-detected area is an over-covered area. Through the technical scheme of the invention, the accuracy of over-coverage detection can be improved.