![]() ![]() In computer vision, translation of an image means shifting it by a specified number of pixels, along the x and y axes. Imwrite("rotated_im.jpg", rotated_image) Start by importing the OpenCV library and reading an image. Okay, now that you know the code and the functions, let’s take a concrete example and try doing it, using OpenCV. Note: You can learn more about OpenCV affine transformations here borderValue: the value to be used in case of a constant border, has a default value of 0.borderMode: the pixel extrapolation method.flags: combination of interpolation methods such as INTER_LINEAR or INTER_NEAREST.The following are the arguments of the function: The complete syntax for warpAffine() is given below: After applying affine transformation, all the parallel lines in the original image will remain parallel in the output image as well. The warpAffine() function applies an affine transformation to the image. The warpAffine() function in OpenCV does the job. Finally, apply the affine transformation to the image, using the rotation matrix you created in the previous step.OpenCV provides the getRotationMatrix2D() function that we discussed above. This typically is the center of the image you are trying to rotate. First, you need to get the center of rotation.If you want to rotate the image clockwise by the same amount, then the angle needs to be negative. If the angle is positive, the image gets rotated in the counter-clockwise direction. scale: an isotropic scale factor which scales the image up or down according to the value provided.angle: the angle of rotation in degrees.center: the center of rotation for the input image.The getRotationMatrix2D() function takes the following arguments: GetRotationMatrix2D(center, angle, scale) The following is the syntax for creating the 2D rotation matrix: OpenCV provides the getRotationMatrix2D() function to create the above transformation matrix. Where & are the coordinates along which the image is rotated. In that case, the transformation matrix gets modified. OpenCV provides the ability to define the center of rotation for the image and a scale factor to resize the image as well. You can rotate an image by a certain angle by defining a transformation matrix. If you need to install OpenCV, please visit the relevant link below. We assume you already have OpenCV in your system. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |