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image_recognition's Introduction

image_recognition

此目录下一共包含四个模块:

  • func_tools 里面主要是包含一些在图像识别的学习过程中,运用到的一些实例,都是一些细化的模块,稍加改动就能在各个地方使用;
  • template-matching-ocr 对于opencv-ocr的运用,通过图片识别银行卡卡号;
  • ImageStich 对SITF的运用,实现图像的拼接(全景图);
  • LPR 一个小型的Flask程序,通过上传车辆照片,识别图片中的车牌信息

接下来我会对这里面的一些功能进行描述及展示。

滤波器常用的一般有低通滤波器、高斯低通滤波器和中值滤波器,其中效果最好的,主观认为是中值滤波器。
中值滤波器:邻域内像素先进行灰度排序,取中间值,在去除噪声的同时,比较好的保留边缘。
上面的链接是自己实现的中值滤波器,其实在opencv中已经集成的有相应模块,直接调用,
传入参数,就能实现中值滤波 median = cv2.medianBlur(img, k) 在"滤波器.py"文件中也有相应展示.

中值滤波器

PCA(Principal Component Analysis)是一种常用的数据分析方法。
PCA通过线性变换将原始数据变换为一组各维度线性无关的表示,可用于提取数据的主要特征分量,常用于高维数据的降维。

PCA的降维与还原

。。。。。。(待补充)

车牌识别1 车牌识别2

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