Photo-realistic single Image super-resolution Using a generative adversarial Network2016.10.23 Summary : contributions:Gans provides a powerful framework to produce high-quality plausible-looking natural images. This article provides a very deep ResNet architure, using the concept of Gans, to form a perceptual loss function to close human perception to do
photo-realistic Sisr.
The main contribution is:1. For image SR, we have ac
conclusion is not straightforward, as other articles simply stack more layers, but this article does a trade off to control a certain time cost.
when the network depth is over-increased, there is a degradation of the network, even if there is no trade off.This phenomenon is a foreshadowing of the innovation of He Keming ResNet.
The most direct effect is that the author only uses the complexity of AlexNet 40%, the GPU speed is 20% faster, and
Scheme 1Inspired by the "error correction" tree above, we can define the following gradient lifting methods:
Use a model to fit the data F1 (x) = y
Use another model to fit the residual of the previous model prediction H1 (x) = Y-F1 (x)
Creating a new model with residual model and original model F2 (x) = F1 (x) + h1 (x)
We can easily think of inserting more models to correct previous model errors (ResNet can be seen as an exampl
input feature map is a 1x1 convolution channel in the 28X28X192,3A module for the 64,3x3 convolution channel for the 128,5x5 convolution channel of 32, if it is a graph structure, then the convolution kernel parameter is 1x1x192x64+3x 3x192x128+5x5x192x32, and a 1x1 convolution layer of channel number 96 and 16 was added to the 3x3 and 5x5 convolution layers before the B figure, so that the convolution kernel parameter becomes 1x1x192x64+ (1x1x192x96+3x3x96x128) + (1x1x 192x16+5x5x16x32), the p
source code.Let's take a look at the effects of this model by experimenting.It can be concluded from table 4 that even if the complexity is reduced by half, the model can still achieve better experimental results than ResNet-200, and achieves the author's goal of "reducing the computational complexity while achieving the accuracy of the complex and compact depth model".Summarize:
The author requests that "Block" has the same topological stru
what kind of it is, so gave it a 0.5 probability.Use active learning to find the more difficult samples to learn with these 5 steps
First of all, the non-annotated image data in a large number of natural images of the network training, we know that there are many commonly used networks, from the initial lenet, AlexNet, Googlenet, Vgg, resnet such networks to test again, get the predicted value. And pick out the hardest, most informative samp
Command history# Cat/root/.bash_history//place where historical commands are stored# History//View the number of command histories# echo $HISTSIZE//View the number of bars that can be saved# Vim/etc/profile//Change the value of variable histsize "/histsize" to search# Source/etc/profile//This will make the value we just modified take effect# vim/etc/profile→ Add histtimeformat= "%y/%m/%d%h:%m:%s" in Histsize to change the format of the output history, for example: 923 2017/06/28 17:56:42 sourc
This course is a total of two parts, the first part of the neural network is a complete introduction, including neural network structure, forward propagation, reverse propagation, gradient descent and so on. The second part explains the basic structure of convolutional neural network, including convolution, pooling and full connection. In particular, it focuses on the details of convolution operation, including convolution core structure, convolution calculation, calculation of convolution kern
using a large filter, and has a smaller number of parameters. In fact, there is a drawback in the application that when performing the reverse propagation, more memory is needed to store the intermediate results of the convolutional layer.
Recent attempts .It is important to note that recent linear stacking models have frequently been challenged, including Google's Inception Architecture and Microsoft Research Asia's Residual neural network resnet
First, IntroductionVgg NET, a deep convolutional neural network developed by the Visual Geometry Group (Visual Geometry Group) of Oxford University and a researcher at Google DeepMind, achieved second place in ILSVRC 2014, dropping the Top-5 error rate to 7.3 %。 Its main contribution is to demonstrate that the depth of the network (depth) is a key part of the algorithm's excellent performance. At present, more and more network structures are mainly ResNet
Wang, Min, Baoyuan Liu, and Hassan Foroosh. "Factorized convolutional neural Networks." ArXiv preprint (2016).
This paper focuses on the optimization of the convolution layer in the deep network, which has three unique features:-Can be trained directly . You do not need to train the original model first, then use the sparse, compressed bits and so on to compress.-Maintain the original input and output of the convolution layer, it is easy to replace the already designed network.- simple to implem
using the same as the equivalent of the energy of PCA, the current layer of γ all add up, and then in order from large to small, select the larger part, usually choose about 70% (Specific situation analysis).
The effect of lambda selection on Γ is as shown in the figure:Lambda is 0, the target function does not punish γ, Lambda equals 1e-5, you can find that the γ=0.0+ has more than 450, the whole is to 0 near. When Λ=1e-4, there was a greater sparse constraint on γ, and it was possible to see
combined with an additional self-organizing layer to form a complete network. We use the term CNN microarchitecture to refer to the specific organization and size of each module. 2.3 CNN Macro Structure
Although the CNN micro architecture involves a single layer and module, we define the CNN macro architecture as a system-level organization of multiple modules to the End-to-end CNN architecture.
Perhaps the most widely studied CNN macro-Architecture topic in recent literature is the impact of d
, knowledge distillation can not be grouped into any category.
And the author of Structured simplification is divided into three categories:Tensor factorization:mobilenet as the representative, the authors suggest that this method cannot decompose 1*1 convolution, while 1*1 convolution is commonly used in googlenet, ResNet and Xception sparse Connection: Deep compression as the representative, this method disadvantage is that the pruning of the conne
Congratulations, you've become a member of the AI Engineer Group.
You can then collect some of your own data and train your own identification engine, or try to optimize the model, feel the pain of the so-called resnet, or simply try to inception these more advanced networks to brush CIFAR , or you can try to learn from NLP or strengthen your learning direction. In short, these things are far less difficult than they seem.
Of course, no matter the ro
artificial intelligence. A typical example is resnet-50[5], which has 50-tier convolution networks, more than 95MB of storage requirements, and the floating-point multiplication times needed to compute each picture. If you prune some of the redundant weights, it will probably save 75% of the parameters and 50% of the calculation time. It is important to use these methods to compress models for devices such as handsets and FPGA, which have only megaby
hierarchical Question-image co-attention for Visual Question answering Jiasen lu, jianwei yang, dhruv batra, Devi Parikh (Submitted on to (V1), last revised Jan (this version, V5)) A number of recent works has proposed attention models for Visual Question answering (VQA) that Generate spatial maps highlighting image regions relevant to answering the question. In this paper, we argue the in addition to modeling ' where to look ' or visual attention, it's equally important to model "What words-l
constraints are very limited, so the resulting results are more serious to ignore, as shown below, and Gan can avoid this problem. Although Psnr and Ssim are smaller (suggesting that the images we have recovered from Gan are not particularly accurate (as opposed to the actual image, the details of the supplement may be different from the actual details, such as the pattern on the head of the figure in the image below, and the collar on the neck, with a distinct texture structure, And the actual
recognition. ArXiv preprint arxiv:1409.1556 (vggnet) [PDF] szegedy, Christian, et al going deeper with convolutions. Proceedings of the IEEE Conference on computer Vision and Pattern recognition. 2015. (googlenet) [PDF] Szegedy C, Vanhoucke V, Ioffe S, et al rethinking the Inception Architecture for computer Vis ION[J]. Computer Science, 2015:2818-2826. (INCEPTION-V3) [PDF] He, Kaiming, et al. Deep residual learning for image recognition. ArXiv preprint arxiv:1512.03385. (
has alexnet[5], vgg-net[6], GOOGLENET[7], Inception v2-v4[8, 9], resnet[10] and so on. 2.2 An effective network training technique-fine tuning (fine-tune)
We do not need to start from scratch a parameter to the experiment to construct a deep network, because there are already a lot of published papers have helped us do these verification, we just need to stand on the shoulders of predecessors, to choose a suitable network structure just fine. And cho
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