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| 3 | PointedEar | 1 | /*------------------------------------------------------------------------------------------*\ |
| 2 | This file contains material supporting chapter 2 of the cookbook: |
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| 3 | Computer Vision Programming using the OpenCV Library. |
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| 4 | by Robert Laganiere, Packt Publishing, 2011. |
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| 5 | |||
| 6 | This program is free software; permission is hereby granted to use, copy, modify, |
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| 7 | and distribute this source code, or portions thereof, for any purpose, without fee, |
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| 8 | subject to the restriction that the copyright notice may not be removed |
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| 9 | or altered from any source or altered source distribution. |
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| 10 | The software is released on an as-is basis and without any warranties of any kind. |
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| 11 | In particular, the software is not guaranteed to be fault-tolerant or free from failure. |
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| 12 | The author disclaims all warranties with regard to this software, any use, |
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| 13 | and any consequent failure, is purely the responsibility of the user. |
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| 14 | |||
| 15 | Copyright (C) 2010-2011 Robert Laganiere, www.laganiere.name |
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| 16 | \*------------------------------------------------------------------------------------------*/ |
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| 17 | |||
| 18 | #include <opencv2/core/core.hpp> |
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| 19 | #include <opencv2/highgui/highgui.hpp> |
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| 20 | |||
| 21 | void salt(cv::Mat &image, int n) { |
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| 22 | |||
| 23 | int i,j; |
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| 24 | for (int k=0; k<n; k++) { |
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| 25 | |||
| 26 | // rand() is the MFC random number generator |
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| 27 | i= rand()%image.cols; |
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| 28 | j= rand()%image.rows; |
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| 29 | |||
| 30 | |||
| 31 | if (image.channels() == 1) { // gray-level image |
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| 32 | |||
| 33 | image.at<uchar>(j,i)= 255; |
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| 34 | |||
| 35 | } else if (image.channels() == 3) { // color image |
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| 36 | |||
| 37 | image.at<cv::Vec3b>(j,i)[0]= 255; |
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| 38 | image.at<cv::Vec3b>(j,i)[1]= 255; |
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| 39 | image.at<cv::Vec3b>(j,i)[2]= 255; |
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| 40 | } |
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| 41 | } |
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| 42 | } |
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| 43 | |||
| 44 | int main() |
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| 45 | { |
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| 46 | srand(cv::getTickCount()); // init random number generator |
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| 47 | |||
| 48 | cv::Mat image= cv::imread("boldt.jpg",0); |
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| 49 | |||
| 50 | salt(image,3000); |
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| 51 | |||
| 52 | cv::namedWindow("Image"); |
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| 53 | cv::imshow("Image",image); |
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| 54 | |||
| 55 | cv::imwrite("salted.bmp",image); |
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| 56 | |||
| 57 | cv::waitKey(5000); |
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| 58 | |||
| 59 | return 0; |
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| 60 | } |
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| 61 | |||
| 62 |