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opencv mat.at<cv::Vec4b> convert to java

asked 2018-04-02 01:47:14 -0500

jhovarie gravatar image

updated 2018-04-02 01:48:00 -0500

Hello I have opencv code written on objective-c I dont know how to convert it on java..

The objective c code looks like this.

cv::Math image2 = .....

for(int x = image2.cols; x >= 0; --x){
  for(int y = 0; y < image2.rows; y++) {
     int red = image2.at<cv::Vec4b>(y,x)[0];
     int green = image2.at<cv::Vec4b>(y,x)[1];
     int blue = image2.at<cv::Vec4b>(y,x)[2];

    //to set the pixel
     //image2.at<cv::Vec4b>(y,x)[0] = 100;
     //image2.at<cv::Vec4b>(y,x)[1] = 0;
     //image2.at<cv::Vec4b>(y,x)[2] = 200;
  }
}

Any help? I need java version of this code.

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Comments

the c++ code is already broken (BGR vs. RGB, also is the type really RGBA or Vec4 ?)

and you should avoid any per pixel code, using openvc.

please learn the api, don't try to defeat it by writing your own loops.

berak gravatar imageberak ( 2018-07-07 10:26:54 -0500 )edit

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answered 2018-07-07 09:47:48 -0500

ali hakimiyan gravatar image

in java you can use get(i,j)

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Asked: 2018-04-02 01:47:14 -0500

Seen: 194 times

Last updated: Jul 07 '18