YOLO Team was established in May 2015, the company known as Beijing Excellent Times Technology Co., Ltd., located in Beijing three Li Tun Soho. The three founders have been a number of users of a certain amount of product operations director, the legendary vice president of the game and video live in the field of the technical male God, as well as from Sina, Tencent, Jinshan senior internet people. Yolo has
Yolo:you only look once:unified, real-time Object Detection
The content of this paper is not many, the core idea is relatively simple, the following is equivalent to the translation of the paper.
Yolo is a convolutional neural network that can predict multiple box positions and classes at once, enabling end-to-end detection and recognition of targets with the greatest advantage of being fast . In fact, the essence of target detection is regression, so
target detection is regression, so a CNN that implements regression does not need a complex design process. Yolo does not choose sliding window or extracting proposal way to train the network, but directly selects the whole graph training model. The advantage of this is that you can better distinguish between the target and the background area, in contrast, the FAST-R-CNN with proposal training methods often mistakenly detect the background area as a
The engineering application of general YOLO is directly detected, which originates from the pre-training model provided by the author, but what if I change the network training. The pre-training network does not do.
Not afraid, two methods can be solved.
The first: The more stupid way is to download imagenet data training Classification network.
The second kind: a layer of change network, each change layer, in the original pre-training conditions to t
Object detection has developed rapidly in the last two years, from RCNN, fast rcnn to towards real time faster rcnn, then real time YOLO, SSD, generation faster than a generation (fps), The generation is stronger than the generation (MAP), faster and stronger, but today is about the real better, faster, and stronger of the a state of the art system----YOLO9000 (and v2).
YOLO v1 A real-time target detection
YOLO official framework using C write, performance, YOLO algorithm, I do not introduce too much. Let me briefly explain how this framework is used. The default here is that YOLO2,YOLO1 is nearly obsolete.Environment recommended for Ubuntu or CentOSYolo is a near-real-time framework, in the 1-core CPU, the recognition of a picture in the 6s-12s, in fact, or in the absence of a cache environment, if it is in
Preface
On June 30, 2017, the source of YOLO on GitHub was updated, and the location of many files changed. This led me to a lot of trouble when I used YOLO v2 to train my own data (many of the solutions on the Web were not perfect). In this experience, I fully recognized the importance of understanding the source code for the successful training of their own data, so I decided to put the
Redmon, J., Divvala, S., Girshick, R., Farhadi, A.: You have look once:unified, real-time object detection. IN:CVPR. (2016)Yolo's all-in-one is a look Once, as the name implies is only seen once, the target area prediction and target category prediction, the author regards the target detection task as the target area prediction and category prediction regression problem. The method uses a single neural network to predict the object boundary and class probability directly, and realizes the end-to
First, the preface
This article mainly uses the YOLO V2 to train own license plate picture data, and can frame the license plate area which exists in the test picture, also is the license plate detection. This article refers to Bowen http://m.blog.csdn.net/qq_34484472/article/details/73135354 and http://blog.csdn.net/zhuiqiuk/article/details/72722227.
Ii. Preparatory work
First you need to download the properly configured darknet, use the./darknet det
installation Caffe Instruction BookEnvironment: Linux 64-bitVideo card for Intel + AMD, non-NVIDIA graphicsNo GPUI. Installation Preparation work1. log in as AdministratorIn the top left corner, click on the icon to search for terminal (that is, terminal) and log in as Super Administrator:Command: sudo suInput password can be2. Install BoostCommand: sudo apt-get install Libboost-all-dev3. Installing BLAS(Intel MKL)(1) Download Intel MKL Library and in
It's nice to have hundreds of people who have successfully used YOLO to process their datasets through my tutorials.
Recently, the CNN model has been used to do image two classification, but suffers from poor results, so the image classification problem as a target recognition problem. Do target recognition selected YOLO (you just look once), a recently introduced method, the outstanding advantage is speed
Prerequisite Description:
1, about YOLO and YOLO v2 detailed explanation please move to the following two links, or directly read the paper (I myself have to write YOLO tutorial, but after thinking the following two links in the article quality is very good _ (: З"∠) _)
Yolo:https://zhuanlan.zhihu.com/p/24916786?refer=xiaoleimlnote
1. YOLO v2 Many files and V1 are not the same, and many iterations, the online existing V2 tutorials in the src/yolo_kernels.cu is gone, this step changes do not control
2. Tutorial : http://blog.csdn.net/hysteric314/article/details/54097845 (remember to make the changes)
3. A tutorial on testing threshold changes, intermediate parameter visualization (which cannot be used directly because the intermediate parameter format has changed):
Http://blog.
Yolo algorithm in the field of object detection is a more interesting branch, the 2017 CVPR YOLO v2 to the original YOLO algorithm was upgraded, the paper itself contains more details of the algorithm, you can first reference blog: YOLO9000 algorithm detailed, Here the details of the YOLO V2 algorithm are detailed with
Yolo Principle: Https://zhuanlan.zhihu.com/p/24916786?refer=xiaoleimlnote for reference googlenet, there are 24 convolutional layers + 2 Fully connected layers: The convolution layer is responsible for feature extraction, and the fully connected layer is classified as regression.steps to detect: 1. The image is scaled to 448*448, the image is divided into 7*7 (s*s) cell 2. The image is extracted by convolution layer, and the target box of two (b) maxi
The target detection algorithm of the RCNN series previously studied was to extract the candidate regions, then use the classifier to identify the regions and position the candidate regions. The process of this kind of method is complex, there are some shortcomings such as slow speed and difficulty in training.
The YOLO algorithm considers the detection problem as a regression problem, uses a single neural network, uses the information of the whole im
Transferred from: http://lanbing510.info/2017/08/28/YOLO-SSD.html
Prior to the emergence of deep learning, the traditional target detection method is probably divided into regional selection (sliding window), feature extraction (SIFT, hog, etc.), classifier (SVM, adaboost, etc.) three parts, the main problems have two aspects: on the one hand, sliding window selection strategy is not targeted, time complexity, window redundancy On the other hand, the
Reference Link:http://blog.csdn.net/tangwei2014This is after rcnn,fast-rcnn and FASTER-RCNN, RBG (Ross girshick) Great God, another masterpiece, played a very entertaining name:YOLO.Although the current version has some mishap, but the current based on the DL detection of a big pain point, is the speed problem.Its enhanced version of the GPU can run 45fps, simplifying version 155fps.Paper Download: http://arxiv.org/abs/1506.02640Code Download: https://github.com/pjreddie/darknetThis blog post fo
YOLOAdvantages: Fast speed, end-to-end. The frame rate on the Titan GPU is 45fps, and the accelerated version of the frame rate can reach 155fps.Disadvantage: It is proved by practice that the algorithm has poor classification effect on small objects and close objects.Experimental resultsSsdsThe frame rate on Titan x reaches 58fps, (in the VOC2007 test, the 72.1%map at the faster r-cnn 7 fps, map 73.2%,yolo under 63.4% fps).For its principleSSD's Disa
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