Open Source Computer Vision Library https://opencv.org/
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Image Processing (imgproc module)

In this section you will learn about the image processing (manipulation) functions inside OpenCV.

  • @subpage tutorial_basic_geometric_drawing

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    We will learn how to draw simple geometry with OpenCV!

  • @subpage tutorial_random_generator_and_text

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    We will draw some fancy-looking stuff using OpenCV!

  • @subpage tutorial_gausian_median_blur_bilateral_filter

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Let's take a look at some basic linear filters!

  • @subpage tutorial_erosion_dilatation

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Let's change the shape of objects!

  • @subpage tutorial_opening_closing_hats

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Here we investigate different morphology operators

  • @subpage tutorial_hitOrMiss

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.4

    Author: Lorena García

    Learn how to find patterns in binary images using the Hit-or-Miss operation

  • @subpage tutorial_morph_lines_detection

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Theodore Tsesmelis

    Here we will show how we can use different morphological operators to extract horizontal and vertical lines

  • @subpage tutorial_pyramids

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    What if I need a bigger/smaller image?

  • @subpage tutorial_threshold

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    After so much processing, it is time to decide which pixels stay

  • @subpage tutorial_threshold_inRange

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Rishiraj Surti

    Thresholding operations using inRange function.

  • @subpage tutorial_filter_2d

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn to design our own filters by using OpenCV functions

  • @subpage tutorial_copyMakeBorder

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to pad our images

  • @subpage tutorial_sobel_derivatives

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to calculate gradients and use them to detect edges

  • @subpage tutorial_laplace_operator

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn about the Laplace operator and how to detect edges with it

  • @subpage tutorial_canny_detector

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn a sophisticated alternative to detect edges

  • @subpage tutorial_hough_lines

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to detect lines

  • @subpage tutorial_hough_circle

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to detect circles

  • @subpage tutorial_remap

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to manipulate pixels locations

  • @subpage tutorial_warp_affine

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to rotate, translate and scale our images

  • @subpage tutorial_histogram_equalization

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to improve the contrast in our images

  • @subpage tutorial_histogram_calculation

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to create and generate histograms

  • @subpage tutorial_histogram_comparison

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn to calculate metrics between histograms

  • @subpage tutorial_back_projection

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to use histograms to find similar objects in images

  • @subpage tutorial_template_matching

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to match templates in an image

  • @subpage tutorial_find_contours

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to find contours of objects in our image

  • @subpage tutorial_hull

*Languages:* C++, Java, Python

*Compatibility:* \> OpenCV 2.0

*Author:* Ana Huamán

Where we learn how to get hull contours and draw them
  • @subpage tutorial_bounding_rects_circles

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to obtain bounding boxes and circles for our contours

  • @subpage tutorial_bounding_rotated_ellipses

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to obtain rotated bounding boxes and ellipses for our contours

  • @subpage tutorial_moments

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn to calculate the moments of an image

  • @subpage tutorial_point_polygon_test

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to calculate distances from the image to contours

  • @subpage tutorial_distance_transform

    Languages: C++, Java, Python

    Compatibility: > OpenCV 2.0

    Author: Theodore Tsesmelis

    Where we learn to segment objects using Laplacian filtering, the Distance Transformation and the Watershed algorithm.

  • @subpage tutorial_out_of_focus_deblur_filter

    Languages: C++

    Compatibility: > OpenCV 2.0

    Author: Karpushin Vladislav

    You will learn how to recover an out-of-focus image by Wiener filter.

  • @subpage tutorial_motion_deblur_filter

    Languages: C++

    Compatibility: > OpenCV 2.0

    Author: Karpushin Vladislav

    You will learn how to recover an image with motion blur distortion using a Wiener filter.

  • @subpage tutorial_anisotropic_image_segmentation_by_a_gst

    Languages: C++

    Compatibility: > OpenCV 2.0

    Author: Karpushin Vladislav

    You will learn how to segment an anisotropic image with a single local orientation by a gradient structure tensor.