opencv学习(7)——图像平滑

来源：互联网发布：lazada销量数据分析编辑：程序博客网时间：2024/05/21 12:44

#include <iostream>#include <vector>#include "opencv2/imgproc/imgproc.hpp"#include "opencv2/imgcodecs.hpp"#include "opencv2/highgui/highgui.hpp"#include "opencv2/features2d/features2d.hpp"using namespace std;using namespace cv;/// Global Variablesint DELAY_CAPTION = 1500;int DELAY_BLUR = 100;int MAX_KERNEL_LENGTH = 31;Mat src; Mat dst;char window_name[] = "Smoothing Demo";/// Function headersint display_caption( const char* caption );int display_dst( int delay );/** * function main */int main( void ){  namedWindow( window_name, WINDOW_AUTOSIZE );  /// Load the source image src=imread("D:\\software_anz\\opencv\\opencv\\sources\\samples\\data\\fruits.jpg", 1 );  if( display_caption( "Original Image" ) != 0 ) { return 0; }  dst = src.clone();  if( display_dst( DELAY_CAPTION ) != 0 ) { return 0; }  /// Applying Homogeneous blur  if( display_caption( "Homogeneous Blur" ) != 0 ) { return 0; }  for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )      { blur( src, dst, Size( i, i ), Point(-1,-1) );        if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }  /// Applying Gaussian blur  if( display_caption( "Gaussian Blur" ) != 0 ) { return 0; }  for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )      { GaussianBlur( src, dst, Size( i, i ), 0, 0 );        if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }  /// Applying Median blur  if( display_caption( "Median Blur" ) != 0 ) { return 0; }  for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )      { medianBlur ( src, dst, i );        if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }  /// Applying Bilateral Filter  if( display_caption( "Bilateral Blur" ) != 0 ) { return 0; }  for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )      { bilateralFilter ( src, dst, i, i*2, i/2 );        if( display_dst( DELAY_BLUR ) != 0 ) { return 0; } }  /// Wait until user press a key  display_caption( "End: Press a key!" );  waitKey(0);  return 0;}/** * @function display_caption */int display_caption( const char* caption ){  dst = Mat::zeros( src.size(), src.type() );  putText( dst, caption,           Point( src.cols/4, src.rows/2),           FONT_HERSHEY_COMPLEX, 1, Scalar(255, 255, 255) );  imshow( window_name, dst );  int c = waitKey( DELAY_CAPTION );  if( c >= 0 ) { return -1; }  return 0;}/** * @function display_dst */int display_dst( int delay ){  imshow( window_name, dst );  int c = waitKey ( delay );  if( c >= 0 ) { return -1; }  return 0;}

1.putText()函数

C++: void putText(Mat& img, const string& text, Point org, int fontFace, double fontScale, Scalar color, int thickness=1, int lineType=8, bool bottomLeftOrigin=false )

Parameters:
img – 显示文字所在图像.
text – 待显示的文字.
org – 文字在图像中的左下角坐标.
font – 字体结构体.
fontFace – 字体类型，可选择字体：FONT_HERSHEY_SIMPLEX, FONT_HERSHEY_PLAIN,FONT_HERSHEY_DUPLEX,FONT_HERSHEY_COMPLEX,FONT_HERSHEY_TRIPLEX,FONT_HERSHEY_COMPLEX_SMALL,FONT_HERSHEY_SCRIPT_SIMPLEX,orFONT_HERSHEY_SCRIPT_COMPLEX,以上所有类型都可以配合 FONT_HERSHEY_ITALIC使用，产生斜体效果。
fontScale – 字体大小，该值和字体内置大小相乘得到字体大小
color – 文本颜色
thickness – 写字的线的粗细，类似于0.38的笔尖和0.5的笔尖
lineType – 线性.
bottomLeftOrigin – true, 图像数据原点在左下角. Otherwise, 图像数据原点在左上角.
2.blur(),GaussianBlur(),medianBlur(),bilateralFilter()
参考：http://blog.csdn.net/vblittleboy/article/details/9187447

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