June 2019
Intermediate to advanced
348 pages
8h 28m
English
Content preview from Qt 5 and OpenCV 4 Computer Vision Projects
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Affine transformation
In the previous section, we successfully rotated images using warpAffine. In this section, we will try to perform an affine transformation using the same function.
First, we will create a new editing plugin project and use AffinePlugin as the project name and the plugin class name, and then use Affine as the action name (that is, we will return this string in the name method).
This time, in the edit method, we will use another method to obtain the transformation matrix for the warpAffine function. First, we prepare two triangles—one is for the input image, and the other is for the output image. In our code, we use the triangles that are shown in the following diagram:
The left one is for the input, while the right one ...
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