OpenCV/opencv/doc/tutorials/imgproc/shapedescriptors/moments/moments.markdown

Image Moments {#tutorial_moments}

@tableofcontents

@prev_tutorial{tutorial_bounding_rotated_ellipses} @next_tutorial{tutorial_point_polygon_test}

| | | | -: | :- | | Original author | Ana Huamán | | Compatibility | OpenCV >= 3.0 |

Goal

In this tutorial you will learn how to:

• Use the OpenCV function @ref cv::moments
• Use the OpenCV function @ref cv::contourArea
• Use the OpenCV function @ref cv::arcLength

Theory

Code

@add_toggle_cpp This tutorial code's is shown lines below. You can also download it from here @include samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp @end_toggle

@add_toggle_java This tutorial code's is shown lines below. You can also download it from here @include samples/java/tutorial_code/ShapeDescriptors/moments/MomentsDemo.java @end_toggle

@add_toggle_python This tutorial code's is shown lines below. You can also download it from here @include samples/python/tutorial_code/ShapeDescriptors/moments/moments_demo.py @end_toggle

Explanation

Result

Here it is: