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How do one-stage and two-stage detectors compare?

Convolutional neural network

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One-stage and two-stage detectors are two different approaches to object detection. One-stage detectors, such as the YOLO series, use a single Convolutional Neural Network (CNN) to directly locate and classify objects. They are faster but less accurate compared to two-stage detectors. Two-stage detectors, like Faster-RCNN, use a complete CNN to extract features and then use those features to locate and classify objects. They are more accurate but slower than one-stage detectors. In terms of performance, the latest version of the YOLO series (YoloV7) achieves the best accuracy at high inference speed . However, apart from YoloV7, Faster-RCNN models remain the most robust in terms of exhibiting the least fluctuations in mean Average Precision (mAP) over different testing datasets .

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Open access•Proceedings Article•DOI Towards Discriminative and Transferable One-Stage Few-Shot Object Detectors 01 Jan 2023	The paper compares one-stage and two-stage detectors in terms of their performance in few-shot object detection.
Journal Article•DOI Detection of sperm cells by single-stage and two-stage deep object detectors Mecit Yüzkat, Hamza Osman Ilhan, Nizamettin Aydin - Show less +2 more 01 May 2023-Biomedical Signal Processing and Control	The paper does not provide a direct comparison between one-stage and two-stage detectors.
Posted Content•DOI Real-time construction demolition waste detection using state-of-the-art deep learning methods; single - Stage vs two-stage detectors. Demetris Demetriou, P. Mavromatidis, Ponsian M. Robert, Harris Papadopoulos, Michael F. Petrou, D. Nicolaides - Show less +5 more 01 Jun 2023-Waste Management	The paper compares the performance of one-stage (SSD, YOLO) and two-stage (Faster-RCNN) detectors for construction and demolition waste detection.
Open access•Journal Article•DOI Comparing one-stage and two-stage learning strategy in object detection Hanqing Bi, Zhenyu Xu - Show less +1 more 14 Jun 2023-Applied and Computational Engineering	The paper compares one-stage and two-stage object detection methods. The one-stage method is faster but less accurate, while the two-stage method is slower but more accurate.
Open access•Journal Article•DOI Real-time construction demolition waste detection using state-of-the-art deep learning methods; single–stage vs two-stage detectors Lawrence J. Brown 01 Jul 2023-Waste Management	The paper compares the performance of one-stage (SSD, YOLO) and two-stage (Faster-RCNN) detectors for construction and demolition waste detection.

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Which AI detector is the best?5 answersThe best AI detector is not explicitly mentioned in the abstracts provided. However, the abstracts discuss different AI language detectors and object detectors. The first two abstracts by Yusupov and Singh compare AI language detectors, focusing on their ability to detect text generated by AI language models and prevent misuse, such as plagiarism detection. The abstract by Shi, Li, and Zhang discusses an efficient one-stage object detector that outperforms the original SSD without sacrificing real-time processing speed. Therefore, based on the information provided, it is not possible to determine the best AI detector as the abstracts focus on different types of detectors for different purposes.

Is effiecentdet two-stage object detector?4 answersEfficientDet is not specifically mentioned in the provided abstracts. However, the abstracts discuss various two-stage object detection models such as R-CNN, SSD, and YOLO-v2. These models are compared based on their accuracy and efficiency. Some papers propose improvements to these models to achieve a better trade-off between accuracy and efficiency. One paper even proposes a two-stage object detection model called DEYO, which combines a classic target detection model with a DETR-like model to improve performance and efficiency. While EfficientDet is not directly mentioned, the abstracts provide insights into the characteristics and performance of two-stage object detection models.

Is Detecton2 two-stage object detector?5 answersDetectron2 is not explicitly mentioned in the provided abstracts. However, based on the information given, it can be inferred that Detectron2 is a two-stage object detector. Two-stage detectors are mentioned in multiple abstracts as having higher identification precision, while single-stage detectors have better inference times. The abstracts also mention the use of two-stage detectors such as Faster R-CNN and R-CNN models. Additionally, the abstracts discuss the improved detection accuracy and speed of You Only Look Once (YOLO) and its successors, which are examples of single-stage detectors. Therefore, it can be concluded that Detectron2, being a popular two-stage object detector, falls into the category of two-stage detectors.

Is yolov5 one-stage object detector?3 answersYes, YOLOv5 is a one-stage object detector.

What are the advantages and limitations of different detection methods and technologies?1 answersDifferent detection methods and technologies have their own advantages and limitations. Rapid detection methods, such as nucleic acid-based methods (PCR, NASBA, LAMP, microarray), biosensor-based methods (optical, electrochemical, mass-based biosensors), and immunological-based methods (ELISA, lateral flow immunoassay), are generally time-efficient, sensitive, specific, and labor-saving. These methods are vital in the prevention and treatment of foodborne diseases. On the other hand, virus detection methods like signature scanning, heuristic scanning, and integrity checking have their own strengths and weaknesses. Signature scanning is the most common method but cannot detect viruses without available signatures. Heuristic scanning can detect unknown or new viruses but can be complex. Integrity checking is limited to specific types of files that are not generally changed by user operations. Overall, the development of virus detection techniques and their application play an important role in health management, disease prevention, and control.

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