Sentence examples for by thresholding the gradient from inspiring English sources

Most edge-based approaches use a differentiation filter to approximate the first-order image gradient or the image Laplacian to detect image edges and then, candidate edges are extracted by thresholding the gradient or Laplacian magnitude.

Locate the strong edges by thresholding the gradient magnitude image at a value t0.

By thresholding the gradient magnitudes of the optical thickness data, objects can be successfully masked, leaving only pixels associated with the background that can then be characterized with a low-order Zernike surface.

(2) Locate the strong edges by thresholding the gradient magnitude image at a value t 0. Pixels with gradient magnitude values less than t 0 are considered pixels belonging to background and their values are put to 0 and values of rest of pixels are kept unchanged.

In 2010, Morel proposed a new PDE-based Retinex method that computed the divergence by thresholding the components of the gradient prior instead of the scalar Laplacian operator [23].

In order to appraise the effectiveness of the adaptive gradient threshold, the gradient threshold k f curves for four noisy images (σ2 = 400) are depicted in Figure 9.

By producing the edge map of objects by curvelet thresholding instead of simple gradient methods, the proposed method shows great promises to recognize edges of multiple objects with weak edges and strong noises.

The edge map is obtained by taking the gradient of the input data and limiting it to an available threshold value.

Once a threshold is set, the gradient value can be compared to the threshold value and an edge is detected when the threshold is exceeded.

Then, a threshold gradient operation is applied to S, with the aim to obtain a gradient matrix G. Namely, the final objective is to obtain an image that includes all the edges selected by the gradient operation (i.e., Y i grad ).

The force between any two charges is determined by the gradient of the overlapping field densities between the charges.