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The gradient is obtained from an existing image and modified for image editing purposes. Various operators, such as finite difference or Sobel, can be used to find the gradient of a given image. This gradient can then be manipulated directly to produce several different effects when the resulting image is solved for.
A matrix wipe is a patterned transition between two images. The matrix wipe can be various patterns such as a grid, stars, etc. A clock wipe is a wipe that sweeps a radius around the center point of the frame to reveal the subsequent shot, like the sweeping hands of an analog clock. Because of this similarity, it is often used to indicate that ...
Each pixel of a gradient image measures the change in intensity of that same point in the original image, in a given direction. To get the full range of direction, gradient images in the x and y directions are computed. One of the most common uses is in edge detection. After gradient images have been computed, pixels with large gradient values ...
The gradient of F is then normal to the hypersurface. Similarly, an affine algebraic hypersurface may be defined by an equation F(x 1, ..., x n) = 0, where F is a polynomial. The gradient of F is zero at a singular point of the hypersurface (this is the definition of a singular point). At a non-singular point, it is a nonzero normal vector.
A linear, or axial, color gradient. In color science, a color gradient (also known as a color ramp or a color progression) specifies a range of position-dependent colors, usually used to fill a region. In assigning colors to a set of values, a gradient is a continuous colormap, a type of color scheme.
This example describes a vertical line wipe, though this is but one type of wipe. Another common type of wipe uses objects in the scene, rather than an invisible vertical line. One interesting application of this creates the illusion of a camera passing through the ceiling of the bottom floor of a multi-story house to the ground of the floor above.
Supported wipe methods Reports BleachBit: Andrew Ziem and contributors GNU General Public License: Windows, Linux: Yes external [1] on screen, Copy and Paste-able CCleaner: Piriform: Trialware: Windows, OS X: Yes external [2]? Darik's Boot and Nuke (DBAN) Darik Horn GNU General Public License: OS independent, based on Linux: No external [3]? dd ...
Instead, the gradient echo uses magnetic gradients to manipulate the spins, allowing the spins to dephase and rephase when required. After an excitation pulse (usually less than 90 degrees), the spins are dephased after a period of time (due to free induction decay) and also by applying a reversed magnetic gradient to decay the spins. [2]