Aiming at the problems of small size and complex background of infrared targets detected at long distances in airborne aerial scenes, the average recognition rate is low, and the real-time performance of the airborne infrared target recognition algorithm is high. In this paper, an improved EfficientDet infrared small target recognition algorithm was proposed. First, an Unsharp Masking method suitable for small infrared target data enhancement is used to enhance the target edge and detail information; Secondly, GhostNet was used as the backbone network of the model, which greatly reduces the amount of parameters of the model and improved the inference speed of the model; Finally, the Coordinate Attention module was used. It was applied to the feature layer extracted by the feature extraction network, which increased the feature expression ability of the network and prompted the network to accurately capture the position information of the small infrared target. The experimental results show that the average accuracy of the optimized algorithm in pure background, complex background, small-scale target and multi-target application scenarios is improved by 2.24%, and the FPS reaches 46.56. Small target recognition provides the basis for edge computing.
There are deviations in the images of the same target at different angles, so the multi-angle infrared images contain additional classification and identification feature information. Therefore, the multi-angle image acquisition system can effectively solve the problems such as occlusion and small target size that cannot be recognized with high precision. Combined with the multi-angle acquisition system, a multi-angle infrared vehicle target recognition algorithm based on Light-Head R-CNN was proposed. Firstly, inputted the multi-angle infrared images of the same target into the ConvNeXt backbone network for feature extraction; Secondly, in order to reduce the amount of model parameters and realize the lightweight of the network, the traditional convolution in the backbone network was replaced with Ghost Module, which reduced the amount of FLOPs and parameters by about 50%; At the same time, according to the characteristics of infrared vehicle targets, the Light-Head R-CNN target recognition algorithm was improved, and an ultra-lightweight ECA module without dimensionality reduction local cross-channel interaction was added to improve the performance of the network for infrared vehicle target recognition; Finally, the Dempster synthesis rule was used to perform data fusion on the recognition accuracy of images from different angles predicted by the network to obtain the final recognition accuracy. It had been verified that compared with single-angle images, when the number of input angles was 2, the recognition accuracy of the algorithm in the constructed data set was improved by 3.8%; The recognition accuracy reached 90.1%, it was optimal, while the input infrared images were distributed at a certain angle and the number was 5, at the same time the speed achieved 44fps. The results fully demonstrated the feasibility of the proposed algorithm in improving the recognition accuracy, and provided a theoretical and experimental basis for enhancing the performance of the target recognition algorithm.
Due to the complex background and weak signal, infrared dim target tracking has become a challenging problem in the field of target tracking. With the increasing maturity of tracking algorithms, better real-time performance and more stable tracking effects have become the main goals pursued by researchers. In recent years, the algorithm of infrared dim target tracking has developed rapidly, and more and more new methods have emerged. This research summarizes the common methods and technical development of infrared dim target tracking, and introduces the latest principles and improvements of infrared dim target tracking. Their advantages and disadvantages are compared by experiments, and the difficulties and development trends of infrared dim target tracking are discussed.
Due to airborne infrared detection device under the limit of detection range will cause the target to be detected in the image of pixels smaller, less radiation, easy to drown in the background. Meanwhile high speed and dim target in complex scene change, however, traditional algorithm only by artificial convolution kernel parameters for object detection and segmentation threshold, will cause more false alarm. To solve this problem, a lightweight dim target detection method based on CNN neural network architecture is proposed in this paper, which effectively improves the detection rate of dim target and reduces the false alarm rate. Through simulation comparison and statistics, it is verified that the detection rate of this algorithm can reach 93%~98% in different scenes, and the average number of false alarms is 0.1~2.6 in a single frame, which realizes the low false alarm detection of targets.
Infrared target recognition is a hot direction in computer vision and digital image processing, which has high theoretical research value and market application prospects, and develops gradually with the development of deep learning, image processing, pattern recognition and other fields. In order to solve the problem of insufficient accuracy and recognition speed of infrared target recognition in practical application. An infrared target recognition method based on SSD-MobileNetv1 target detection model is constructed. In this paper, the self-made infrared data set is used, and the data set is enhanced and annotated, and the noise is suppressed. In the Windows system, the object detection API of TensorFlow is used to train the data set, and the trained SSD-MobileNetv1 model is used to classify the test images and obtain the recognition results. The experimental results show that: The SSD-MobileNetv1 model has good detection and recognition effects on infrared images; The model has the advantages of accurate target location, high recognition accuracy, and good stability for the recognition of images with background interference.
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