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| 3 | PointedEar | 1 | /*------------------------------------------------------------------------------------------*\ |
| 2 | This file contains material supporting chapter 1 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 <iostream> |
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| 19 | #include <opencv2/core/core.hpp> |
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| 20 | #include <opencv2/highgui/highgui.hpp> |
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| 21 | |||
| 22 | // function that creates and returns an image |
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| 23 | cv::Mat function() { |
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| 24 | |||
| 25 | // create image |
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| 26 | cv::Mat ima(240,320,CV_8U,cv::Scalar(100)); |
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| 27 | // return it |
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| 28 | return ima; |
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| 29 | } |
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| 30 | |||
| 31 | int main() { |
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| 32 | |||
| 33 | // create image |
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| 34 | cv::Mat image; |
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| 35 | // print image size |
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| 36 | std::cout << "size: " << image.size().height << " , " |
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| 37 | << image.size().width << std::endl; |
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| 38 | // open image |
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| 5 | PointedEar | 39 | image= cv::imread("baboon1.jpg"); |
| 3 | PointedEar | 40 | // check if image has been successfully read |
| 41 | if (!image.data) { |
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| 5 | PointedEar | 42 | // no image has been created� |
| 3 | PointedEar | 43 | return 0; |
| 44 | } |
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| 45 | // print image size |
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| 46 | std::cout << "size (after reading): " << image.size().height << " , " |
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| 47 | << image.size().width << std::endl; |
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| 48 | |||
| 49 | // display image |
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| 50 | cv::namedWindow("Original Image"); // define the window |
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| 51 | cv::imshow("Original Image", image); // show the image |
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| 52 | |||
| 53 | // create another image |
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| 54 | cv::Mat result; |
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| 55 | // flip the image |
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| 56 | cv::flip(image,result,1); // positive for horizontal |
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| 57 | // 0 for vertical, |
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| 58 | // negative for both |
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| 59 | // display result |
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| 60 | cv::namedWindow("Output Image"); |
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| 61 | cv::imshow("Output Image", result); |
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| 62 | // wait for key pressed |
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| 63 | cv::waitKey(0); |
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| 64 | // write image on file |
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| 65 | cv::imwrite("output.bmp", result); |
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| 66 | |||
| 67 | // create two new images |
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| 68 | cv::Mat image2, image3; |
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| 69 | |||
| 70 | image2= result; // the two images refer to the same data |
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| 71 | result.copyTo(image3); // a new copy is created |
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| 72 | |||
| 73 | // flip vertically this time |
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| 74 | cv::flip(result,result,0); |
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| 75 | |||
| 76 | // display result |
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| 77 | cv::namedWindow("image 2"); |
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| 78 | cv::imshow("image 2", image2); |
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| 79 | cv::namedWindow("image 3"); |
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| 80 | cv::imshow("image 3", image3); |
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| 81 | |||
| 82 | // get a gray-level image |
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| 83 | cv::Mat gray= function(); |
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| 84 | // display result |
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| 85 | cv::namedWindow("Gray Image"); |
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| 86 | cv::imshow("Gray Image", gray); |
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| 87 | |||
| 88 | // wait for key pressed |
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| 89 | cv::waitKey(0); |
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| 90 | return 1; |
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| 91 | } |
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| 92 |