基于改进BP神经网络的图像识别算法

Image Recognition Algorithm Based on Improved BP Neural Network

为提高图像识别的准确率和速度,结合遗传算法和BP神经网络设计了一种改进图像识别算法。由于传统BP神经网络本身存在结构参数不确定、收敛速率低、容易陷入局部最小值等问题。本文首先提取图像的颜色和纹理特征,利用BP神经网络实现特征的初步识别同时基于遗传算法在线优化BP神经网络结构参数。在此基础上,给出了图像识别流程。最后,根据证据理论实现图像识别结果融合以获得完整图像信息。仿真结果表明:所述算法具有较高的识别率和收敛速度;在少量训练样本条件下,改进BP神经网络依旧具有较好的泛化能力。

In order to improve the accuracy and speed of image recognition, an improved image recognition algorithm is designed based on genetic algorithm and BP neural network as results of the traditional BP neural network has problems such as structural parameter uncertainty,low convergence rate and local minimum value. Firstly,the color and texture feature of the image are extracted. BP neural network structure parameters are optimized by using BP neural network based on the genetic algorithm.The image recognition process is presented and the image recognition result is integrated according to the evidence theory to obtain the complete image information. The simulation results show that the algorithm has high recognition rate and convergence speed. Under the condition of a small number of training samples,BP neural network still has better generalization ability.