發(fā)布時間：2018-05-20 19:33

  本文選題：深度學(xué)習 + 圖像分類��； 參考：《東華理工大學(xué)》2017年碩士論文

【摘要】：近幾年以來,隨著科學(xué)計算機網(wǎng)絡(luò)及人工智能領(lǐng)域的發(fā)展,圖形圖像數(shù)據(jù)量逐漸增多,于是,如何從大量的自然圖像中快速提取到視覺特征已經(jīng)成了機器智能學(xué)習中的熱點研究課題,進而對自然圖像的分類必然成為獲取自然圖像信息的研究重點。卷積神經(jīng)網(wǎng)絡(luò)是深度學(xué)習在圖像處理方面的一個重要應(yīng)用。它相比于其它機器學(xué)習算法如SVM等,其優(yōu)點是能夠直接對圖像像素進行卷積并提取特征,也能夠利用海量的圖像數(shù)據(jù)將網(wǎng)絡(luò)參數(shù)訓(xùn)練充分,以達到更好的分類效果。本文對基于深度學(xué)習的自然圖像分類方法展開研究,主要工作及創(chuàng)新點如下:1)基于tensorflow深度學(xué)習框架平臺設(shè)計一個用于識別圖像的淺層卷積神經(jīng)網(wǎng)絡(luò),并分別用單GPU和多GPU訓(xùn)練加速來對比該網(wǎng)絡(luò)性能,其中多GPU訓(xùn)練該網(wǎng)絡(luò)的所用的時間比單GPU縮短了25分鐘。該項工作的設(shè)計旨在建立一個較好的網(wǎng)絡(luò)結(jié)構(gòu)進行訓(xùn)練和評估,并為工作3中建立更加復(fù)雜的網(wǎng)絡(luò)模型做鋪墊。2)本文圍繞卷積神經(jīng)網(wǎng)絡(luò)的網(wǎng)絡(luò)結(jié)構(gòu)和多參數(shù)分別進行了改進和優(yōu)化。研究實驗表明,對batch值、dropout、momentum動量值、數(shù)據(jù)集擴增等的優(yōu)化,能夠有效地提高深層卷積神經(jīng)網(wǎng)絡(luò)模型的識別率。因此,合理的增加網(wǎng)絡(luò)層數(shù),優(yōu)化訓(xùn)練參數(shù)提高訓(xùn)練效率,以達到最佳的分類效果是圖像分類應(yīng)用研究中非常重要的目的。3)基于tensorflow深度學(xué)習框架平臺,并用GPU訓(xùn)練加速來進行卷積神經(jīng)網(wǎng)絡(luò)的網(wǎng)絡(luò)結(jié)構(gòu)改進設(shè)計和參數(shù)優(yōu)化。首先,設(shè)計一個具有9層結(jié)構(gòu)的深層卷積神經(jīng)網(wǎng)絡(luò)。其次,用該網(wǎng)絡(luò)結(jié)構(gòu)分別對cifar-10和cifar-100等復(fù)雜圖像數(shù)據(jù)庫進行訓(xùn)練、測試和優(yōu)化參數(shù)。結(jié)果表明,該網(wǎng)絡(luò)結(jié)構(gòu)相比之前研究者的網(wǎng)絡(luò)模型(Conv-KN)對這兩種復(fù)雜的圖像庫的分類準確率分別提高了9.26%和3.55%。tensorflow框架平臺下的深層卷積神經(jīng)網(wǎng)絡(luò)的分類效果要明顯好于其它平臺,并且tensorflow框架平臺下的訓(xùn)練時間上也得到了極大的提高。
[Abstract]:In recent years, with the development of scientific computer network and artificial intelligence, the amount of graphic and image data is increasing gradually. So how to quickly extract visual features from a large number of natural images has become a hot topic in machine intelligent learning, and then the classification of natural images will inevitably become the acquisition of natural image information. Research emphasis. Convolution neural network is an important application of deep learning in image processing. Compared with other machine learning algorithms, such as SVM, it has the advantage that it can convolution the image pixels directly and extract the features, and can also use massive image data to train the network parameters fully in order to achieve better classification results. This paper studies the classification method of natural image based on deep learning. The main work and innovation are as follows: 1) based on the tensorflow deep learning framework platform, a shallow convolution neural network for identifying images is designed, and the performance of the network is compared with single GPU and multiple GPU training respectively, in which the multi GPU is used to train the network. The time is 25 minutes shorter than the single GPU. The design of the work is designed to build a better network structure for training and evaluation, and to build a more complex network model for work 3. This paper improves and optimizes the network structure and multi parameters of the convolution neural network respectively. The research experiments show that the batch value, D The optimization of ropout, momentum momentum, and data set amplification can effectively improve the recognition rate of the deep convolution neural network model. Therefore, it is very important for the image classification application to increase the number of network layers, optimize the training parameters and improve the training efficiency, and to achieve the best classification effect in the study of the image classification application. Based on the depth of tensorflow, the.3 Study frame platform and accelerate the network structure improvement design and parameter optimization of convolution neural network with GPU training. First, a deep convolution neural network with 9 layers structure is designed. Secondly, the network structure is used to train, test and optimize the parameters of complex image databases such as cifar-10 and cifar-100, respectively. Compared with the previous researchers' network model (Conv-KN), the classification accuracy of the two complex image bases is improved by 9.26% and the deep convolution neural network under the 3.55%.tensorflow framework platform is better than the other platforms, and the training time under the tensorflow frame platform is also greatly improved. Improve.
【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP391.41;TP18

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本文編號：1915953