Revision history [back]

Hello,

I am trying to port matlab code to c++ with opencv. I could import most source code but I had serious problems with the imfilter function. I was trying to use the filter2d function for c++, but It doesn't get same results between among themselves. What is the difference? How I could get the same result? The source code is very simple.....

    //src_gray has one channel
    //C++ code
filter2D(src_gray, dst,-1, kernel);

    //Matlab code 
    dst = imfilter(src_gray,kernel)

Hello,

I am trying to port matlab code to c++ with opencv. I could import most source code but I had serious problems with the imfilter function. I was trying to use the filter2d function for c++, but It doesn't get same results between among themselves. What is the difference? How I could get the same result? The source code is very simple.....

    //src_gray has one channel
    //C++ code
filter2D(src_gray, dst,-1, kernel);

    //Matlab code 
    dst = imfilter(src_gray,kernel)

11    11    11    11    11
11    11    11    11    11

 2     2
 2     2

88    88    88    88    44
44    44    44    44    22

Hello,

I am trying to port matlab code to c++ with opencv. I could import most source code but I had serious problems with the imfilter function. I was trying to use the filter2d function for c++, but It doesn't get same results between among themselves. What is the difference? How I could get the same result? The source code is very simple.....

    //src_gray has one channel
    //C++ code
filter2D(src_gray, dst,-1, kernel);

    //Matlab code 
    dst = imfilter(src_gray,kernel)

Inputs: src_gray=

11    11    11    11    11
11    11    11    11    11

kernel =

 2     2
 2     2

output:

Matlab:

ans =

88    88    88    88    44
44    44    44    44    22

C++: [88 88 88 88 88; 88 88 88 88 88]

My c++ code:

/// Initialize arguments for the filter
 Point anchor( -1, -1 );
 double delta = 0;
 int ddepth = -1;
 Mat dst;
 
dst;
float data[2][5] = {{11,11,11,11,11},{11,11,11,11,11}};
 float kernel[2][2] = {{2,2},{2,2}};
 
{{2,2},{2,2}};
Mat src = Mat(2, 5, CV_32FC1, &data);
 Mat ker = Mat(2, 2, CV_32FC1, &kernel);
 
&kernel);
filter2D(src, dst, ddepth , ker,anchor);
 cout << dst << endl;
 
endl;
char c;
 scanf("%c",&c);scanf("%c",&c);

Hello,

I am trying to port matlab code to c++ with opencv. I could import most source code but I had serious problems with the imfilter function. I was trying to use the filter2d function for c++, but It doesn't get same results between among themselves. What is the difference? How I could get the same result? The source code is very simple.....

    //src_gray has one channel
    //C++ code
filter2D(src_gray, dst,-1, kernel);

    //Matlab code 
    dst = imfilter(src_gray,kernel)

Inputs: src_gray=

11    11    11    11    11
11    11    11    11    11

kernel =

 2     2
 2     2

output:

Matlab:

ans =

88    88    88    88    44
44    44    44    44    22

C++: [88 88 88 88 88; 88 88 88 88 88]

My c++ code:

/// Initialize arguments for the filter
Point anchor( -1, -1 );
double delta = 0;
int ddepth = -1;
Mat dst;

float data[2][5] = {{11,11,11,11,11},{11,11,11,11,11}};
float kernel[2][2] = {{2,2},{2,2}};

Mat src = Mat(2, 5, CV_32FC1, &data);
Mat ker = Mat(2, 2, CV_32FC1, &kernel);

filter2D(src, dst, ddepth , ker,anchor);
cout << dst << endl;

char c;
scanf("%c",&c);

Hello,

I am trying to port matlab code to c++ with opencv. I could import most source code but I had serious problems with the imfilter function. I was trying to use the filter2d function for c++, but It doesn't get same results between among themselves. What is the difference? How I could get the same result? The source code is very simple.....

    //src_gray has one channel
    //C++ code
filter2D(src_gray, dst,-1, kernel);

    //Matlab code 
    dst = imfilter(src_gray,kernel)

Inputs: src_gray=

11    11    11    11    11
11    11    11    11    11

kernel =

 2     2
 2     2

output:

Matlab:

ans =

88    88    88    88    44
44    44    44    44    22

C++: C++:

[88 88 88 88 88;
88 88 88 88 88]
88; 88 88 88 88 88]

My c++ code:

/// Initialize arguments for the filter
Point anchor( -1, -1 );
double delta = 0;
int ddepth = -1;
Mat dst;

float data[2][5] = {{11,11,11,11,11},{11,11,11,11,11}};
float kernel[2][2] = {{2,2},{2,2}};

Mat src = Mat(2, 5, CV_32FC1, &data);
Mat ker = Mat(2, 2, CV_32FC1, &kernel);

filter2D(src, dst, ddepth , ker,anchor);
cout << dst << endl;