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Gradient images are created from the original image (generally by convolving with a filter, one of the simplest being the Sobel filter) for this purpose. 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 ...
Sunrise seen over the Atlantic Ocean through cirrus clouds on the Jersey Shore at Spring Lake, New Jersey, U.S. Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning, [1] at the start of the Sun path. The term can also refer to the entire process of the solar disk crossing the horizon.
The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper ...
The technique counts occurrences of gradient orientation in localized portions of an image. This method is similar to that of edge orientation histograms , scale-invariant feature transform descriptors, and shape contexts , but differs in that it is computed on a dense grid of uniformly spaced cells and uses overlapping local contrast ...
Two-dimensional slice through 3D Perlin noise at z = 0. Perlin noise is a type of gradient noise developed by Ken Perlin in 1983. It has many uses, including but not limited to: procedurally generating terrain, applying pseudo-random changes to a variable, and assisting in the creation of image textures.
If, within one TR, either one of the gradient moments of magnetic gradients along three logical directions, including slice selection direction (G ss), phase encoding (G pe) and readout (G ro), is not zero, then spins along such direction obtain different phases, making the signal intensity (SI) of a single voxel the vector sum of magnetizations therein.
Impression, Sunrise (French: Impression, soleil levant) is an 1872 painting by Claude Monet first shown at what would become known as the "Exhibition of the Impressionists" in Paris in April, 1874. The painting is credited with inspiring the name of the Impressionist movement .
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.