我怎么知道iplimage的高斯模糊系数？

Question

目前我正在使用iplimage的高斯模糊。像这样，

# include "stdio.h"
# include "highgui.h"
# include "cv.h"

int main( int argc, char** argv ) {
    IplImage* img = 0;
    IplImage* out = 0;

    if( argc < 2 ) {
        printf( "Usage: Accepts one image as argument\n" );
        exit( EXIT_SUCCESS );
    }

    img = cvLoadImage( argv[1] );

    if( !img ) {
        printf( "Error loading image file %s\n", argv[1]);
        exit( EXIT_SUCCESS );
    }

    out = cvCreateImage( cvGetSize(img), IPL_DEPTH_8U, 3 );


    cvSmooth( img, out, CV_GAUSSIAN, 3, 3 );

    cvReleaseImage( &img );
    cvReleaseImage( &out );
    cvDestroyWindow( "Example1" );
    cvDestroyWindow( "Output" );
    return EXIT_SUCCESS;
}

但是不知道iplimage的高斯模糊用的是什么系数

如何知道iplimage的高斯模糊系数？

Answer 1

IplImage 没有任何高斯模糊系数。 IplImage 是来自 Intel Processing Library 的一种数据结构，用于存储图像数据。

你如何找到你的过滤操作中使用的系数？那么你阅读手册并找出...

http://docs.opencv.org/3.0-beta/modules/imgproc/doc/filtering.html#smooth

由于您没有在函数调用中提供 sigma（或者假设在其他人的函数调用中，因为我怀疑您编写了该代码），它默认为 0。

cvSmooth( img, out, CV_GAUSSIAN, 3, 3 );

In the case of a Gaussian parameter this parameter may specify Gaussian sigma (standard deviation). If it is zero, it is calculated from the kernel size:

sigma = 0.3 (n/2 - 1) + 0.8

其中 n 是您的内核大小

Using standard sigma for small kernels ( 3 x 3 to 7 x 7 ) gives better speed. If sigma1 is not zero, while size1 and size2 are zeros, the kernel size is calculated from the sigma (to provide accurate enough operation).

我怎么知道iplimage的高斯模糊系数？

How can I know the Gaussian blur coefficients of iplimage?

image-processing

filter

gaussian

iplimage