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Why use convolution?
In traditional neural networks, such as Multilayer perceptron (MLP), whose input is usually a feature vector, requires manual design features, and then the values of these features to form a feature vector, in the past decades of experience, the characteristics of artificial found is not how to use, sometimes more, sometimes less, Sometimes the selected features do not work at all (the truly functional feature is inside the vast u
This note describes the third week of convolutional neural networks: Target detection (1) Basic object detection algorithmThe main contents are:1. Target positioning2. Feature Point detection3. Target detectionTarget positioningUse the algorithm to determine whether the image is the target object, if you want to also mark the picture of its position and use the border marked outAmong the problems we have st
that the 2D convolution is actually 3D (the dimensions of the convolution kernel should be kernel_height * kernel_height * input_channel), except that the third dimension is exactly equal to the number of input channels, So the volume after the third dimension on the lost, became a flat two-dimensional feature map, so called 2D convolution.Another way of understanding is that the shape of a convolution core is kernel_height * kernel_height, and there is a input_channel layer, the process of mak
The first part of the full-connected network weights updateconvolutional neural network using gradient-based learning methods to supervise training, in practice, the general use of random gradient descent (machine learning in several common gradient descent) version, for each training sample is updated once the weight, error function using the error square Sum fu
1.computer Vision
CV is an important direction of deep learning, CV generally includes: image recognition, target detection, neural style conversion
Traditional neural network problems exist: the image of the input dimension is larger, as shown, this causes the weight of the W dimension is larger, then he occupies a larger amount of memory, calculate W calculati
In the deep network, the learning speed of different layers varies greatly. For example: In the back layer of the network learning situation is very good, the front layer often in the training of the stagnation, basically do not study. In the opposite case, the front layer learns well and the back layer stops learning.This is because the gradient descent-based learning algorithm inherently has inherent inst
The structure of the classic convolutional neural network generally satisfies the following expressions:
Output layer, (convolutional layer +--pooling layer?) ) +-Full connection layer +
In the above formula, "+" means one or more, "? "represents one or 0, such as" convolutional
In this blog post we briefly analyze the class--layers of the last network structure in the TINY_CNN convolutional neural network model.First of all, layers can be called a layer structure of the vector, that is, the layer structure of the container. Because convolutional
Original articleReprint please register source HTTP://BLOG.CSDN.NET/TOSTQ the previous section we introduce the forward propagation process of convolutional neural networks, this section focuses on the reverse propagation process, which reflects the learning and training process of neural networks. Error back propagation method is the basis of
Turn from: The Heart of the machine
Introduction
Frankly speaking, I can't really understand deep learning for a while. I look at relevant research papers and articles and feel that deep learning is extremely complex. I try to understand neural networks and their variants, but still feel difficult.
Then one day, I decided to start with a step-by-step basis. I break down the steps of technical operations and manually perform these steps (and calcula
Study, the use of convolutional neural network has been a long time, the period has been based on the Caffe framework of the Jiayanqing great God to study other people's model, or in the boring time in the same way as the fortune-telling, eyes micro-closed, bobbing, the mouth occasionally leaking a few syllables, a long time DIY out of a think of a lot of models,
convolutional Neural Networks (convolution neural network, CNN) have achieved great success in the field of digital image processing, which has sparked a frenzy of deep learning in the field of natural language processing (Natural Language processing, NLP). Since 2015, papers on deep learning in the field of NLP have e
Kalchbrenner ' s PaperKal's article cited a high number of citations, he proposed a network model called DCNN (Dynamic convolutional neural Networks), in the previous (Kim's Paper) experimental results Section also verified the effectiveness of this model. The subtleties of this model lie in the way of pooling, using a method 动态Pooling called.Is the model of th
edge to 256 D to get B, and then in the center of B take 256*256 square picture to get C, and then randomly extract 224*224 on C as a training sample, and then in the combination of image level inverse increase the sample to achieve data gain. This gain method is 2048 times times the sample increase, allowing us to run a larger network.(2) Adjust the RGB valueThe specific idea is: To do PCA analysis of three channel, get the main component, make some
Transferred from: http://blog.csdn.net/u014380165/article/details/77284921
We know that convolutional neural Network (CNN) has been widely used in the field of image, in general, a CNN network mainly includes convolutional layer, pool layer (pooling), fully connected layer,
. Most likely exceptions in TestMnist.exe 0x00007ffaf3531f28: Microsoft C + + exception: Cryptopp::aes_phm_decryption::i at memory location 0x0b4e7d60 Nvalidciphertextorkey. 0x00007ffaf3531f28 most likely exception in TestMnist.exe: Microsoft C + + exception: Fl::filesystem::P athnotfound at memory location 0x0014e218. 0x00007ffaf3531f28 most likely exception in TestMnist.exe: Microsoft C + + exception: Xsd_binder::malformeddocumenterror at memory location 0X0014CF10.Off-topic, if you need to pu
Refer to:Https://towardsdatascience.com/the-fall-of-rnn-lstm-2d1594c74ce0(The fall of Rnn/lstm)"hierarchical neural attention encoder", shown in the figure below:Hierarchical neural Attention EncoderA better-to-look-into-the-past is-to-use attention modules-summarize all past encoded vectors into a context vector Ct.Notice There is a hierarchy of attention modules here, very similar to the hierarchy of
biased term, followed by a nonlinear function. If you use $h ^{k}$ to represent the feature map of the $k $ layer, the corresponding filter is determined by the $W ^{k}$ and bias $b _{k}$, then the feature map $h ^{k}$ can be computed from the next (using Tanh for nonlinear functions):$h _{ij}^{k}=tanh (w^{k}*x) _{ij}+b_{k}$In order to get a richer representation of the data, each hidden layer is usually composed of multiple feature graphs: $\{h^{\text{(k)}},k=0,... k\}$. The weight $W $ is rep
1. Target positioning
1.1 Introduction to classification, positioning and testing
-Image classificationImage classification, is to give you a picture, you determine the target category, such as cars, cats and so on.-Classification with localizationPositioning classification, not only to determine the target category, but also to output the position of the target object, such as the box up.-DetectionDetection, there may be multiple objects in the picture, you need to find them out. 1.2 Position
C ++ convolutional neural network example: tiny_cnn code explanation (10) -- layer_base and layer Class Structure Analysis
In the previous blog posts, we have analyzed most of the layer structure classes. In this blog post, we plan to address the last two layers, it is also the two basic classes layer_base and layer that are at the bottom of the hierarchy for a b
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