Image Processing (imgproc module)

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

  • Smoothing Images

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Eroding and Dilating

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Let’s change the shape of objects!

  • More Morphology Transformations

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Here we investigate different morphology operators

  • Hit-or-Miss

    Compatibility:> OpenCV 2.4

    Author: Lorena García

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

  • Extract horizontal and vertical lines by using morphological operations

    Compatibility:> OpenCV 2.0

    Author: Theodore Tsesmelis

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

  • Image Pyramids

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    What if I need a bigger/smaller image?

  • Basic Thresholding Operations

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Thresholding Operations using inRange

    Compatibility:> OpenCV 2.0

    Author: Rishiraj Surti

    Thresholding operations using inRange function.

  • Making your own linear filters!

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Adding borders to your images

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to pad our images

  • Sobel Derivatives

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Laplace Operator

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Canny Edge Detector

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn a sophisticated alternative to detect edges

  • Hough Line Transform

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to detect lines

  • Hough Circle Transform

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to detect circles

  • Remapping

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to manipulate pixels locations

  • Affine Transformations

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Histogram Equalization

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to improve the contrast in our images

  • Histogram Calculation

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to create and generate histograms

  • Histogram Comparison

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn to calculate metrics between histograms

  • Back Projection

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Template Matching

    Languages: C++, Java, Python

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to match templates in an image

  • Finding contours in your image

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Convex Hull

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn how to get hull contours and draw them

  • Creating Bounding boxes and circles for contours

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Creating Bounding rotated boxes and ellipses for contours

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Image Moments

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

    Where we learn to calculate the moments of an image

  • Point Polygon Test

    Compatibility:> OpenCV 2.0

    Author: Ana Huamán

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

  • Image Segmentation with Distance Transform and Watershed Algorithm

    Compatibility:> OpenCV 2.0

    Author: Theodore Tsesmelis

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

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